Yes — unlike ZMesh, Tuff Cable must always be embedded in a heatsink material. For floor heating, this is typically a mortar bed, concrete slab, or self-leveling cementitious compound. The heatsink stores and distributes the heat from the cable evenly across the floor surface. This requirement adds some installation complexity compared to mesh-based systems, but results in excellent, even heat distribution and long cable life due to the protection the embed provides.

Yes. Tuff Cable floor systems can be designed for both supplemental floor warming — where the primary heat source is a furnace or boiler — and total space heating, where the radiant floor system provides all the heat for the space. Total space heating applications require higher wattage and closer run spacing than floor warming. Heatizon’s design team determines the correct configuration based on room dimensions, insulation levels, heat loss calculations (provided by the project’s engineer), and climate data.

Tuff Cable is compatible with almost all floor coverings where a heatsink material is present in the floor assembly — including hardwood, carpet, tile, laminate, engineered wood, linoleum, and vinyl. The heatsink is typically concrete, a mortar bed, or a self-leveling compound into which the Tuff Cable is embedded before the floor covering is installed. Unlike ZMesh, Tuff Cable requires this heatsink layer — it cannot be installed directly under flooring without an embed.

Yes. Tuff Cable is listed by Intertek (ETL) — an OSHA-recognized Nationally Recognized Testing Laboratory — to UL and CSA standards for snow and ice melting on surfaces and roofs, and for interior floor heating applications. Together with ZMesh, Tuff Cable is one of only two products in the world authorized under UL Standard 1588 for snow and ice melting installed under roofing materials. All Heatizon systems are designed to ASHRAE standards for heating load calculation and energy efficiency.

Tuff Cable and ZMesh are both Heatizon low-voltage heating elements and both are ETL listed under UL Standard 1588 for under-roof snow melting — but they are designed for different installation methods. Tuff Cable is a round copper cable that must always be embedded in a heatsink material (concrete, asphalt, mortar, Invizimelt panel). ZMesh is a flat bronze mesh that lays directly beneath flooring or roofing without any embed. Tuff Cable is the right choice where a heatsink is present or required — driveways, metal roofs, floor overlays. ZMesh is the right choice where no embed is possible or desired — under non-metal shingles, hardwood floors, and carpet.

Tuff Cable carries an industry-leading 25-year manufacturer’s warranty — the longest available for any electric radiant heating cable in its category. The warranty reflects the cable’s construction: 10-gauge coated copper heating cable that gets embedded in a protective heatsink, with footage marks for verifiable installation, and a low-voltage design that reduces electrical stress on the insulation over time. Heatizon has documented installations from decades ago that remain fully operational.

Tuff Cable is a low-voltage system powered by a step-down transformer that reduces the supply voltage — typically 120V, 208V, 240V, or 277V AC — to 65 volts or less at the cable. This low operating voltage is one of Tuff Cable’s key safety advantages over line-voltage systems, and it also allows the cable to be cut and spliced in the field, and to be installed in surfaces where line-voltage systems are not permitted or practical.

Tuff Cable is a low-voltage electric radiant heating cable made from a specially-engineered copper heating wire (approximately 10-gauge), manufactured by Heatizon Systems. It is chemical and gasoline resistant, comes with footage marks printed along the cable for easy layout verification, and is designed to always be embedded in a heatsink material — such as concrete, asphalt, mortar, stone, pavers, or Heatizon’s Invizimelt Panel. Tuff Cable is a cut-to-length product, giving installers precise control over system sizing without material waste.

ZMesh is a cut-to-length product, unlike most UL-listed radiant heating cables which are fixed-length. This gives installers flexibility to size each run precisely to the space — eliminating the waste and design constraints of fixed-length systems. ZMesh is available in rolls from 50 to 400 feet and can be cut on site to the exact length required by the project layout.

Yes. ZMesh is one of the only radiant heating elements on the market that can be repaired in the field if cut or damaged. Repair requires a customized copper splice plate and solder — a straightforward process compared to the full element replacement required by most competing fixed-length heating cables. This repairability is a meaningful long-term advantage, particularly for installations that may be subject to renovation or remodeling work years after the original installation.

Yes — provided the nail, screw, or staple does not make contact with any other electrically conductive material. ZMesh can be nailed and stapled through freely during roofing and flooring installation, which is one of its key practical advantages over conventional heating cables. This eliminates the need to plan fastener locations around the heating element and allows standard roofing and flooring installation techniques to proceed unmodified.

Yes. ZMesh can be retrofitted between floor joists from an unfinished basement or crawlspace below, without disturbing the finished floor above. This makes it one of the only radiant heating elements that can be added to an existing home without any flooring removal — a significant advantage for renovation projects where disruption and cost need to be minimized.

Yes. ZMesh is well suited to hardwood floor heating. The 12-inch width is the standard recommendation for hardwood applications. Before installation, allow the hardwood to acclimate to the room’s humidity level for several weeks to minimize dimensional changes after heating begins. After laying and connecting ZMesh, test and then run the system for before nailing or stapling the hardwood to the subfloor — this allows the wood to adjust to its heated operating temperature. As with all radiant floor heating under hardwood, confirm with the flooring manufacturer that surface temperatures will not exceed 85°F.

No. Unlike most radiant heating cables that must be embedded in a mortar or self-leveling compound to transfer heat, ZMesh is installed directly beneath the floor covering without any mortar bed or heatsink embedment. Because ZMesh is only 1/16 inch thick, it adds virtually no height to the floor assembly — eliminating the cost of a cementitious mud bed, the structural upgrades needed to support its weight, and the installation complexity it introduces. This makes ZMesh one of the most practical radiant floor heating solutions for both new construction and retrofit projects.

ZMesh carries an industry-leading 25-year manufacturer’s warranty. The long warranty is backed by the product’s construction: because ZMesh is installed under roofing or flooring rather than exposed to the elements, it is protected from UV damage, physical impact, and weathering. Heatizon’s distributors have documented ZMesh installations from decades ago that remain fully operational and visually unchanged. In most installations, ZMesh will outlast the roofing or flooring material installed above it.

The width choice affects heat output, not coverage area. The 9-inch mesh allows more runs to be placed in a given space, resulting in higher watts per square foot — up to 13 watts per square foot — making it the recommended choice for roof deicing where aggressive snow and ice melting is needed. The 12-inch mesh produces a lower watt density, which is better suited for radiant floor heating where even, gentle warmth is the goal. Heatizon’s design team specifies the appropriate width for each project based on application and local climate.

ZMesh serves two distinct applications: under-shingle roof deicing and ice dam prevention, and radiant floor and space heating. For roof applications, ZMesh is installed beneath non-conductive shingles, membranes, and wood decking to melt snow and ice from eaves and valleys. For floor applications, ZMesh is installed beneath virtually any non-conductive floor covering — including hardwood, tile, stone, carpet, engineered wood, linoleum, and vinyl — to provide even, comfortable radiant warmth. Both applications use the same physical element; the installation method and wattage configuration differ by use case.

ZMesh is a woven bright bronze metal mesh heating element manufactured by Heatizon Systems. It resembles screen door material in appearance and is approximately 1/16 inch thick, available in 9-inch and 12-inch widths and in lengths from 50 to 400 feet. The bronze construction is highly durable, fully recyclable, and designed to outlast the roofing or flooring installed above it. ZMesh has been in continuous production and use since 1979.

ZMesh was first used over 28 years ago.  Since 1979 the 9” ZMesh systems have been sold worldwide and are still in operation.

ZMesh comes with an industry leading, 25-year manufacturer’s warranty.

Since 1979, Tuff Cable systems have been sold worldwide and are still in operation, worry free.

Tuff Cable comes with an industry leading, 25-year manufacturer’s warranty.
Tuff Cable is ETL Listed for snow and ice melting on surfaces and roofs and for interior floor heating applications.

All of our systems come with complete installation manuals and can be installed by any electrician, contractor, or experienced “do-it-yourselfer.”  An electrician is needed to supply the necessary power and to Control Unit location. We also offer installation DVD clips for an installation reference. Heatizon offers unlimited technical support to customers.

Yes they sure can, this would fall under our under roof deicing system, or in snow melting look under deck and using a Invizimelt system with Tuff Cable.

Yes you can resurface a retrofit. There are products that can resurface concrete using epoxies or polymers. It can be thin or thick depending on which product is chosen.

Line voltage products like Heatizon lines of MI Cables, Heatwave floor warming mats, and Self Regulating Cables are fed by a typical 120V, 208V, 240V, 277V, 480V and in some cases for MI Cables up to 600V AC power.  These products are either constant wattage single conductor or dual conductor or dual conductor self regulating.  High voltage products do not require a transformer and are an economical solution for many projects.  Typical high voltage products offer a lower warranty than low voltage products and more expensive circuit breaker components for outdoor applications than low voltage systems.  Low voltage products use a step down transformer to convert high voltage to low voltage. These systems are very easy to repair compared to high voltage products while using a safe low voltage power source.  Low voltage systems offer a higher warranty than their line voltage counterparts.  Heatizon offers such a wide range of product choices because each and every one has an application where they fit best offering our customers a choice for the best product to fit their budget and application.

To upgrade the standard programmable thermostat (M429) to a programmable touchscreen thermostat, visit http://tilewarming.com and purchase the $170.00 touchscreen thermostat (M429-TS). Once you receive your new thermostat, send back the thermostat you received with your original Amazon order to the following address (You are responsible for paying return shipping costs), and you will receive a credit of $125.00 on your earlier order of $170.00, making the total $45.

Send thermostats for credit to:

THERMOSTAT UPGRADE
Heatizon Systems
4137 South 500 West
Murray, UT 84123

NOTE: Please properly package thermostat to ensure that it does not get damaged in return shipping. Use a shipping method that allows for tracking of the unit to verify delivery. No express shipping is required.

We do have a WIFI enabled thermstat available for the Heatwave system, however we keep a limited supply on-hand due the higher price of the unit. Please contact us about the availablity of these units. 1.888.239.1232

In most cases it is possible to increase the square footage of the Heatwave system to accommodate larger spaces.  Please contact us for more information about this application. 1.888.239.1232

The complete user manual is available here: M429 User Manual

No.

In the event that an accident has occurred and the heating element needs to be repaired, please visit: http://www.radiantshop.com/repairkit to purchase a repair kit. NOTE: This will have enough materials to do ONE repair. DO NOT repair the system more than two (2) times.

The cable and connection points MUST be completely embedded so that you cannot see the red cable or connection points, there is no maximum depth of thinset/mortar.

There are a few methods to secure the cable to the floor until it is embedded:

1. Use a small amount of tape to hold the cable tot he floor. (do not cover ALL of the cable, just use small perpendicular strips to secure it)
2. Hot glue is acceptable, provided that the tip of the glue gun DOES NOT touch the heating element. Do a small drop on the floor and press the heating cable into the drop.
3. The mat comes with a tape on one side of the mat to aid in securing it to the floor.
4. Staples may be used on the mesh portion of the mat. (DO NOT STAPLE THE RED HEATING CABLE)

Should you wish to bypass the various scheduling options on the M429 thermostat, follow the following procedures:

1. Press the OK button twice to activate the main menu.
2. Use the UP or DOWN buttons to scroll to MODE, then press OK.
3. Use the UP or DOWN buttons to scroll to MAN. MODE, then press OK.
4. Set desired temperature and press the OK button.
5. Use the UP or DOWN buttons to scroll to EXIT, then press OK.
6. Your thermostat will now maintain the set temperature. (Note: power bumps/losses may reset the thermostat back to a pre-programed schedule.)

NOTE: Using the thermostat in this manner may cause excessive power usage, especially if the space is inadequately insulated and/or the desired temperature is very high.

This is a sensor problem, here are a few fixes:

1. Check to ensure the thermostat is firmly connected to the “C” and “D” ports behind the face plate of the thermostat.
2. If you did not install a floor sensor or it is damaged, set the thermostat to red ambient temperature:
   1. Press the OK button twice to bring up the main menu.
   2. Use the UP or DOWN buttons to scroll to SETTINGS, then press OK.
   3. Use the UP or DOWN buttons to scroll to APPLICATION, then press OK.
   4. Use the UP or DOWN buttons to select ROOM, then press OK.
   5. Set desired temperature (some model of thermostat)
   6. Use the UP or DOWN buttons to scroll to EXIT, then press OK. (do this twice)
   7. Your thermostat will now measure the temperature of the room and NOT the floor sensor. (TIP: You may have to adjust the thermostat temperature higher or lower than expected to achieve desired floor temperature.)
3. Test the floor sensor to measure resistance to check for resistance.
   1. Set your multimeter to the 200k Ohm (Ω) setting.
   2. touch a probe to each end of the sensor wire.
   3. A functioning floor sensor should get a reading between 9,000 and 25,000 ohms, if the sensor fails this test, please see #2 for how to switch to ambient air sensor.

NOTE: Whenever working on ANY wiring for the thermostat, please TURN OFF the breaker powering the thermostat and floor heating system.

The black connections points at the end of the heating cable and between the red heating cable and the black cold lead are engineered connection points and WILL heat up and it is crucial that BOTH of these connection points get fully embedded in thinset and/or mortar.

Since these connection points are thicker than the heating element, best advice is to chisel out a small groove for the connection point to sit in, in order to lower it’s profile.

DO NOT DAMAGE OR REMOVE EITHER OF THESE CONNECTION POINTS. THEY CANNOT BE REPAIRED.

The floor sensor is located inside the box containing the thermostat. It is a separate thin-gauge cable from the heating mat/cable.

The black cable that attaches to the red heating cable is called the COLD LEAD (as it does NOT heat up). It is designed to be able to be cut and or shortened in order to better accommodate reaching the Thermostat location.

There are a few things to do to mitigate excess cable/mat:

1. The best advice is if you still can return the mat/cable to Amazon especially if you have a large amount of excess cable and get the next size system down.
2. Tighten spacing between cable spacing (keep at least 2 inches of space between heating cable) and DO NOT overlap ANY heating cables or heating cable over any other cable.
3. Remove cable from the mat and run it into areas where the mat does not fit. (Use a small amount of tape or glue to keep the heating cable in place.)

Reminder, DO NOT, UNDER ANY CIRCUMSTANCES, CUT (OR ATTEMPT TO SHORTEN) THE READ HEATING CABLE. The heating cable is specifically engineered to be the length it is.

All Hott-Wire systems are custom-designed to ASHRAE standards — the American Society of Heating, Refrigeration and Air-Conditioning Engineers’ snow melting data provides region-specific watt-per-square-foot targets that account for local snowfall rates, ambient temperatures, and wind exposure. Cable spacing is calculated to meet the required watt density for the installation region. The MI variant must be ordered to exact length once the design is finalised; the self-regulating variant can be cut to length on site. Contact a Heatizon distributor to begin the design process for your project.

Hott-Wire snow melting systems are activated by a relay panel or contactor panel, which allows a single activation device to control multiple heating circuits simultaneously — essential for larger commercial installations covering thousands of square feet. Smaller systems can connect the activation device directly to the heating element without a separate relay panel. Automatic snow and ice detection sensors are the recommended activation method, triggering the system when temperature drops below 38°F and moisture is detected — eliminating the need for manual switching. More advanced activation methods, WIFI, weather-predicting, and BAS/BMS integration is also available.

Yes. Hott-Wire can be retrofitted into existing concrete and asphalt surfaces using a saw-cut method — channels are cut into the existing surface, the cable is laid into the channels, and the surface is patched with a compatible overlay material. This approach delivers performance comparable to a new-pour installation without the cost and disruption of full surface removal and replacement.

Like Tuff Cable, Hott-Wire systems use jumpers — steel and aluminum brackets covering the Hott-Wire cable — to protect the cable where it passes through concrete crack control joints and expansion joints. The jumper encases the cable so slab movement cannot apply mechanical stress to the heating element at the joint location. Proper jumper installation at every joint is essential for long-term system reliability in concrete applications.

Hott-Wire can be installed in new-pour concrete, hot-pour asphalt, sand or stone dust beds under pavers, and retrofit into existing concrete or asphalt surfaces via saw cut. Its MI construction withstands the temperatures and pressures of hot-pour asphalt installation — a capability shared with Tuff Cable but not available in most competing line-voltage heating cables. Hott-Wire is suitable for driveways, walkways, parking areas, loading docks, ramps, stairs, and any other paved exterior surface requiring snow melting.

Choose MI Hott-Wire for large commercial and industrial surfaces, projects with high snow load requirements, installations in severe northern climates, and any application where maximum watt output and long-term performance are the priority. MI cable delivers consistent, precise output regardless of temperature and is the more durable long-term option. Choose self-regulating Hott-Wire for smaller or irregularly shaped areas, retrofit projects where the exact layout isn’t finalised before ordering, or applications in milder climates where the lower maximum output of self-regulating cable is sufficient. Contact a Heatizon distributor to determine the right variant for your specific project.

Self-regulating cable automatically adjusts its heat output based on the surrounding temperature — producing more heat when conditions are colder and less when they are warmer. This means the cable never overheats and cannot be damaged by overlapping or bundling, making installation more forgiving than fixed-output MI cable. Unlike the MI variant, self-regulating Hott-Wire is cut to length in the field — no pre-ordering to exact specifications required. The tradeoff is that self-regulating cable has lower maximum output than MI cable and is typically chosen for applications where the installation layout is less predictable or where the moderate output of a self-regulating system is sufficient for the climate and surface area.

Yes. The mineral-insulated Hott-Wire cable is a fixed-length product — it is manufactured to the exact length required for the project and cannot be shortened or extended in the field. This requires the system to be designed and sized before the cable is ordered. Watt output per lineal foot is determined by project requirements — spacing between runs is calculated to meet the ASHRAE snow melting watt-per-square-foot target for the installation region. The self-regulating variant of Hott-Wire, by contrast, is cut to length in the field.

Cold leads are the non-heating cable sections that connect the heating element to the electrical panel. On standard MI cables, cold leads must be spliced onto the heating element on-site during installation — a process that requires special tools, adds labor time, and introduces a potential failure point at the splice. Hott-Wire’s MI cable comes with cold leads pre-connected at the factory, eliminating field splicing entirely. The installer simply routes the cold leads from the heating zone to the panel and terminates them — a straightforward connection with no specialized splicing equipment required.

Most MI cables use magnesium oxide (MgO) as the mineral insulation — but MgO is hygroscopic, meaning it absorbs moisture from the environment over time. Moisture absorption degrades the insulation and can eventually cause cable failure. Hott-Wire uses inert fiberglass insulation instead, which does not absorb moisture. This makes Hott-Wire more resistant to the humidity and freeze-thaw cycles encountered in outdoor snow melting installations, and contributes directly to its 10-year warranty longevity. This is a specific engineering improvement over standard MgO MI cable construction.

A mineral-insulated (MI) heating cable consists of a central metal conductor surrounded by a compressed mineral insulation — in Hott-Wire’s case, inert fiberglass — encased in a copper outer tube and coated with an HDPE jacket. MI cable technology was first patented in 1896 and has been used in critical applications including nuclear reactors, fire alarm systems, military equipment, and emergency infrastructure precisely because of its extraordinary durability and resistance to mechanical damage, high temperatures, and moisture. Heatizon’s Hott-Wire brings this industrial-grade construction to snow melting applications, engineered specifically for radiant heating performance.

Yes. Hott-Wire is ETL listed for snow and ice melting applications — certified by Intertek, an OSHA-recognized Nationally Recognized Testing Laboratory carrying equal legal standing to UL and CSA listings in the United States. All Heatizon systems are designed to ASHRAE standards for snow melting load calculations by region.

Hott-Wire carries a 10-year manufacturer’s warranty — the longest available in the line-voltage mineral-insulated heating cable category. The warranty is backed by the cable’s MI construction: a copper conductor in fiberglass insulation inside a copper tube, which provides exceptional resistance to moisture, mechanical damage, and the temperature extremes encountered in outdoor snow melting applications.

Hott-Wire operates at line voltage — 208V, 240V, or 277V AC supplied directly from the building’s electrical panel. Hott-wire MI can also accommodate 480V and 600V (Canada). Smaller systems typically use a 208V, 240V, or 277V supply with a 30-amp breaker; larger area installations use a double-pole 40-amp breaker. Unlike Heatizon’s Tuff Cable, Hott-Wire does not require a step-down transformer — the cable connects directly to the line voltage supply through a relay or contactor panel.

The primary difference is voltage. Tuff Cable is a low-voltage system — it operates at 65 volts or less via a step-down transformer, making it well suited to mid-size residential and commercial projects and roof deicing applications. Hott-Wire is a line-voltage system running at 208V, 240V, or 277V directly from the supply — no transformer required — making it more practical for large commercial and industrial snow melting surfaces where higher wattage output and simpler electrical integration are priorities. Both cables can be installed in concrete, asphalt, pavers, and retrofit saw cuts, and both are rated for hot-pour asphalt. Tuff Cable also carries a UL 1588 listing for under-roof applications; Hott-Wire does not.

Hott-Wire is Heatizon’s line-voltage electric snow melting and radiant heating cable — available in two configurations. The first is a mineral-insulated (MI) fixed-length cable: a central copper conductor surrounded by fiberglass insulation compressed inside a copper tube with an HDPE jacket, factory-terminated with pre-connected cold leads. The second is a self-regulating cut-to-length cable that automatically adjusts its heat output based on ambient temperature. Both variants run at line voltage — 208V, 240V, or 277V (480 and 600 volts for the MI version) — without a step-down transformer, and both are custom-designed to ASHRAE standards for each project.

For non-conductive roofing materials — asphalt shingles, wood shake, tile, and most membranes — ZMesh is the recommended alternative. ZMesh lays directly under the shingles without any panel system, is approximately 1/16 inch thick, can be nailed and stapled through, and carries the same UL 1588 listing and 25-year warranty as the Tuff Cable in Invizimelt. Invizimelt with Tuff Cable is the correct choice for metal roofing, valley metal, flashing, and conductive surfaces where ZMesh cannot be used.

The Tuff Cable heating element within every Invizimelt system carries Heatizon’s industry-leading 25-year manufacturer warranty — 2.5 times the length of the standard 10-year warranty offered by competing heating cable products. The Invizimelt aluminum panels are a solid-state component with no wear parts and no expected service life limitation under normal installation conditions. Heatizon provides full technical support after commissioning with no time limit.

Yes. The Invizimelt system, using Tuff Cable as the heating element, is ETL listed to UL Standard 1588 and CSA standards — making it the only listed system available for under-roof snow and ice melting in the United States and Canada. This listing makes the Invizimelt system the only under-roof deicing product fully compliant with NEC Article 426 for enclosed panel heating applications. For permitted construction projects requiring a code-compliant under-roof deicing system, Invizimelt with Tuff Cable is the only listed option on the market.

Yes. The Invizimelt system — panels, Tuff Cable heating element, and control unit — contains no moving parts. The only mechanical action in the system is the automatic activator, which has no moving parts either, detecting snow and ice conditions electronically. A solid-state system with no moving parts has no wear components that require scheduled maintenance or replacement over the life of the installation.

Once Tuff Cable is snapped into the Invizimelt panel channels, aluminum tape is applied over the cable and panel surface. Aluminum’s high thermal conductivity means heat from the cable spreads rapidly and evenly across the full panel face, with no heat lost downward into the sub-roof below. The result is that essentially 100% of the electrical energy consumed by the Tuff Cable is converted to useful heat at the panel surface — making Invizimelt one of the most energy-efficient under-roof heating configurations available.

Invizimelt panels have a finished installed height of ¼ inch. This low profile means metal roofing panels, membrane, and other roof coverings lay completely flat over the Invizimelt system with no visible ridges or bumps in the finished roof. The ¼ inch height also provides ample surface for nailing and screwing metal roof panels — installers do not need to work around fastener locations when installing the roofing material over the panels.

Yes. The Invizimelt panel system is modular — panels come in different sizes and configurations that can be assembled to cover eaves, valleys, crickets, dormers, and other non-standard roof features. The modular format allows the system to be customized to any roof pitch or layout without cutting or fabricating custom components on site.

A complete Invizimelt system includes the aluminum panels in the sizes required for the project, Tuff Cable low-voltage heating element cut to length, aluminum tape for panel coverage, a control unit with monitoring functions, automatic snow and ice detection activator, and project specifications. Custom installation layout drawings from Heatizon’s design team are also available for some projects. The step-down transformer is sized and specified as part of the system design. Heatizon provides full project design assistance and technical support as part of every system.

The Invizimelt system is designed to heat from the drip edge up to the point where interior building heat is already warming the roof from below — the zone where snow naturally melts on its own. This design eliminates cold spots between the heated eave zone and the warm upper roof, preventing meltwater from refreezing mid-roof before it can drain. Unlike cable-on-roof systems that only heat a narrow strip at the eave, Invizimelt provides continuous coverage across the full ice dam risk zone. Heatizon’s design team specifies the exact panel coverage area based on roof geometry, insulation values, and local snowfall data.

Yes. Invizimelt can be retrofitted to existing roofs in two ways: panels can be installed over the roof edge shingle, sitting on top of the existing roofing at the eave line, or they can be installed under the roof edge shingle by lifting and relaying the lower courses of roofing material. The over-shingle retrofit method requires no shingle removal and is the faster installation — the panels are visible at the eave but concealed once any fascia or trim is in place. Both methods result in a fully functional, listed deicing system without a full re-roof.

On new construction, Invizimelt panels are attached to the roof deck along eaves, valleys, crickets, dormers, and other ice dam-prone areas. Tuff Cable is snapped into the panel channels and covered with aluminum tape, which directs 100% of the heat upward through the panel. Ice/Water shield is applied over the Invizimelt system, the Tuff Cable is marked, to ensure it is not punctured. Finally, the roofing material — metal, membrane, or other covering — is then installed directly over the panels. At ¼ inch finished height, the panels create no visible ridges or bumps in the finished roof surface, and provide ample nailing and fastening surface for the roofing contractor.

Yes. Invizimelt panels can be installed under deck surfaces as well as roofing materials — particularly where a solid subfloor is being used and the deck surface is stone, or some other continuous material needing a snow/ice melting system.
For snow melting systems for decks that installs on joists, please see our Deck Pan Heating System.

Invizimelt is compatible with all roofing materials — including standing seam metal roofing, corrugated metal, membrane roofing, slate, asphalt shingles, and composite shingles. It is the only listed system approved for installation under metal roofing surfaces. For non-metal shingle applications such as asphalt or wood shake where no panel system is needed, ZMesh is the recommended alternative — it lays directly under shingles without any panel or heatsink.

Aluminum transfers heat significantly faster than cementitious materials such as concrete or mortar. When Tuff Cable is covered with aluminum tape inside the Invizimelt panel, 100% of the cable’s heat output is directed upward into the panel surface — none is lost downward into the substrate below. A cementitious heatsink absorbs and stores heat more slowly and loses some of it downward into the sub-roof. Invizimelt’s aluminum construction means the system reaches operating temperature faster, responds more quickly to changing weather conditions, and uses energy more efficiently.

Invizimelt is Heatizon’s patented aluminum panel system for under-roof and under-deck deicing. Tuff Cable low-voltage heating cable snaps directly into the aluminum panels, which are then installed beneath the roofing or decking material — completely concealed from view. The aluminum panels act as a heatsink, rapidly distributing heat from the cable across the full panel surface and up through the roofing material above, melting snow and ice from the eaves, valleys, and roof edge before ice dams can form. Invizimelt is for exclusive use with Heatizon’s Tuff Cable.

Tuff Cable installed in Invizimelt Panels is compatible with all roofing materials — including metal roofing, non-metal shingles (asphalt, composite, wood shake, tile), membranes, valley metal, flashing, and metal drip edges. This makes Tuff Cable the more versatile of Heatizon’s two under-roof heating elements: where ZMesh is limited to non-conductive materials, Tuff Cable embedded in a heatsink works under any roof covering.

Invizimelt is Heatizon’s patented aluminum panel system designed for under-roof deicing. Tuff Cable snaps into the Invizimelt Panel channels, which then act as a heatsink — distributing heat evenly across the panel surface and up through the roofing material above. The aluminum construction provides rapid, efficient heat transfer compared to cementitious heatsink materials. Invizimelt Panels are modular, available in different sizes to fit varying roof pitches and valleys, and can be installed on new construction or retrofitted over the roof edge on existing roofs.

Yes. Tuff Cable, installed in Heatizon’s Invizimelt Panel, is the only listed system for snow and ice melting under metal roofing, valley metal, flashing, and metal drip edges. This under-metal-roof listing is covered under UL Standard 1588 and ETL certified — the same standard that makes Heatizon’s products the only under-roof systems compliant with NEC Article 426. Tuff Cable must always be fully embedded in the Invizimelt Panel for metal roof applications — it cannot be laid directly against metal roofing surfaces without a heatsink material.

Yes. Tuff Cable is the only low-voltage heating cable designed to withstand hot-pour asphalt installation. Its 10-gauge coated copper construction and chemical resistance allow it to survive the temperatures and chemical composition of freshly poured asphalt — making it the only practical low-voltage option for new asphalt driveway and roadway snow melting applications. In a two-pour asphalt installation, Tuff Cable is laid on the binder or base coat layer, and the final asphalt surface layer is poured directly over it.

Yes. Tuff Cable is listed by Intertek (ETL) — an OSHA-recognized Nationally Recognized Testing Laboratory — to UL and CSA standards for snow and ice melting on surfaces and roofs, and for interior floor heating applications. Together with ZMesh, Tuff Cable is one of only two products in the world authorized under UL Standard 1588 for snow and ice melting installed under roofing materials. All Heatizon systems are designed to ASHRAE standards for heating load calculation and energy efficiency.

Tuff Cable and ZMesh are both Heatizon low-voltage heating elements and both are ETL listed under UL Standard 1588 for under-roof snow melting — but they are designed for different installation methods. Tuff Cable is a round copper cable that must always be embedded in a heatsink material (concrete, asphalt, mortar, Invizimelt panel). ZMesh is a flat bronze mesh that lays directly beneath flooring or roofing without any embed. Tuff Cable is the right choice where a heatsink is present or required — driveways, metal roofs, floor overlays. ZMesh is the right choice where no embed is possible or desired — under non-metal shingles, hardwood floors, and carpet.

Tuff Cable carries an industry-leading 25-year manufacturer’s warranty — the longest available for any electric radiant heating cable in its category. The warranty reflects the cable’s construction: 10-gauge coated copper heating cable that gets embedded in a protective heatsink, with footage marks for verifiable installation, and a low-voltage design that reduces electrical stress on the insulation over time. Heatizon has documented installations from decades ago that remain fully operational.

Tuff Cable is a low-voltage system powered by a step-down transformer that reduces the supply voltage — typically 120V, 208V, 240V, or 277V AC — to 65 volts or less at the cable. This low operating voltage is one of Tuff Cable’s key safety advantages over line-voltage systems, and it also allows the cable to be cut and spliced in the field, and to be installed in surfaces where line-voltage systems are not permitted or practical.

Yes. For complete winter weather protection on a rooftop or elevated deck, the pedestal paver system integrates naturally with other Heatizon products. Invizimelt and ZMesh can protect surrounding roof membrane and low-slope areas, while GutterMelt addresses gutters and downspouts. Using these systems together eliminates all potential drainage blockage points in a single, coordinated installation.

Snow and ice accumulation on rooftop pedestal paver installations can block drainage pathways, leading to standing water, ice dams, and structural loading concerns. Heatizon’s system melts snow and ice at the paver surface, allowing meltwater to flow freely through the gaps between pavers and into the roof’s drainage system. For complete drainage protection, the pedestal paver system can be combined with Heatizon’s Invizimelt, ZMesh, or GutterMelt products to address drains, gutters, and surrounding surfaces.

Yes. Heatizon offers full project design assistance and ongoing project support for pedestal paver snow melting installations. This includes reviewing project drawings, calculating heating loads, confirming paver and pedestal compatibility, and providing installation layouts. This service is included with the system package and is designed to ensure correct performance from installation through operation.

The Heatizon pedestal paver snow melting system is sold as a complete, patented package. Each package includes: the insulated heating pans, the Hott-Wire line-voltage mineral-insulated heating cable, GFEP-protected relay panel(s), an automatic snow/ice detection activator, installation layout drawings, and select accessories. Note that pedestals themselves are not included, as these are typically sourced separately based on project specifications.

Heatizon’s snow melting system is compatible with leading pedestal systems used in commercial and residential construction. The system ships with project-specific layout drawings to ensure correct fit. Contact Heatizon’s design team for confirmation of compatibility with a specific pedestal brand or profile.

The Heatizon pedestal paver system accommodates several common paver sizes. Because the heating pan is engineered to fit beneath the paver rather than being embedded in it, variations in paver dimensions are not an obstacle. Heatizon’s design team provides system layouts specific to each project, confirming compatibility with the pavers and pedestal system in use before installation begins.

Yes. Heatizon’s pedestal paver heating system is designed to be retrofitted into existing pedestal paver installations. The heating pans are sized to accommodate a range of common paver dimensions, so in most cases the pavers can be lifted, the pans installed beneath them, and the pavers relaid — without requiring full demolition or replacement of the pedestal substructure.

Heatizon’s pedestal paver snow melting system supports 208V, 240V, 277V, and 480V supply voltages. This range of compatibility ensures the system can be integrated into most commercial and residential electrical configurations without requiring a dedicated transformer or voltage conversion.

The Heatizon pedestal paver system uses an custom engineered aluminum insulated pan that sits directly beneath each paver. The Hott-Wire heating cable runs inside the pan, and because the pan is insulated on the underside, heat is directed upward into the paver rather than lost downward. This focused transfer makes the system more energy-efficient than systems without directional insulation, and allows the paver surface itself to act as the melting surface.

A pedestal paver snow melting system is an electric radiant heating solution designed for elevated, open-air spaces where pavers sit on adjustable pedestals — such as rooftop terraces, decks, and plaza surfaces. Heatizon’s patented system fits an insulated heating pan beneath each paver, containing a Hott-Wire mineral-insulated heating cable. When activated, the cable heats the pan, which transfers warmth directly up through the paver surface to melt accumulated snow and ice, keeping drainage pathways clear and the space safe to use year-round.

For non-conductive roofing materials — asphalt shingles, wood shake, tile, and most membranes — ZMesh is the recommended alternative. ZMesh lays directly under the shingles without any panel system, is approximately 1/16 inch thick, can be nailed and stapled through, and carries the same UL 1588 listing and 25-year warranty as the Tuff Cable in Invizimelt. Invizimelt with Tuff Cable is the correct choice for metal roofing, valley metal, flashing, and conductive surfaces where ZMesh cannot be used.

The Tuff Cable heating element within every Invizimelt system carries Heatizon’s industry-leading 25-year manufacturer warranty — 2.5 times the length of the standard 10-year warranty offered by competing heating cable products. The Invizimelt aluminum panels are a solid-state component with no wear parts and no expected service life limitation under normal installation conditions. Heatizon provides full technical support after commissioning with no time limit.

Yes. The Invizimelt system, using Tuff Cable as the heating element, is ETL listed to UL Standard 1588 and CSA standards — making it the only listed system available for under-roof snow and ice melting in the United States and Canada. This listing makes the Invizimelt system the only under-roof deicing product fully compliant with NEC Article 426 for enclosed panel heating applications. For permitted construction projects requiring a code-compliant under-roof deicing system, Invizimelt with Tuff Cable is the only listed option on the market.

Yes. The Invizimelt system — panels, Tuff Cable heating element, and control unit — contains no moving parts. The only mechanical action in the system is the automatic activator, which has no moving parts either, detecting snow and ice conditions electronically. A solid-state system with no moving parts has no wear components that require scheduled maintenance or replacement over the life of the installation.

Once Tuff Cable is snapped into the Invizimelt panel channels, aluminum tape is applied over the cable and panel surface. Aluminum’s high thermal conductivity means heat from the cable spreads rapidly and evenly across the full panel face, with no heat lost downward into the sub-roof below. The result is that essentially 100% of the electrical energy consumed by the Tuff Cable is converted to useful heat at the panel surface — making Invizimelt one of the most energy-efficient under-roof heating configurations available.

Invizimelt panels have a finished installed height of ¼ inch. This low profile means metal roofing panels, membrane, and other roof coverings lay completely flat over the Invizimelt system with no visible ridges or bumps in the finished roof. The ¼ inch height also provides ample surface for nailing and screwing metal roof panels — installers do not need to work around fastener locations when installing the roofing material over the panels.

Yes. The Invizimelt panel system is modular — panels come in different sizes and configurations that can be assembled to cover eaves, valleys, crickets, dormers, and other non-standard roof features. The modular format allows the system to be customized to any roof pitch or layout without cutting or fabricating custom components on site.

A complete Invizimelt system includes the aluminum panels in the sizes required for the project, Tuff Cable low-voltage heating element cut to length, aluminum tape for panel coverage, a control unit with monitoring functions, automatic snow and ice detection activator, and project specifications. Custom installation layout drawings from Heatizon’s design team are also available for some projects. The step-down transformer is sized and specified as part of the system design. Heatizon provides full project design assistance and technical support as part of every system.

The Invizimelt system is designed to heat from the drip edge up to the point where interior building heat is already warming the roof from below — the zone where snow naturally melts on its own. This design eliminates cold spots between the heated eave zone and the warm upper roof, preventing meltwater from refreezing mid-roof before it can drain. Unlike cable-on-roof systems that only heat a narrow strip at the eave, Invizimelt provides continuous coverage across the full ice dam risk zone. Heatizon’s design team specifies the exact panel coverage area based on roof geometry, insulation values, and local snowfall data.

Yes. Invizimelt can be retrofitted to existing roofs in two ways: panels can be installed over the roof edge shingle, sitting on top of the existing roofing at the eave line, or they can be installed under the roof edge shingle by lifting and relaying the lower courses of roofing material. The over-shingle retrofit method requires no shingle removal and is the faster installation — the panels are visible at the eave but concealed once any fascia or trim is in place. Both methods result in a fully functional, listed deicing system without a full re-roof.

On new construction, Invizimelt panels are attached to the roof deck along eaves, valleys, crickets, dormers, and other ice dam-prone areas. Tuff Cable is snapped into the panel channels and covered with aluminum tape, which directs 100% of the heat upward through the panel. Ice/Water shield is applied over the Invizimelt system, the Tuff Cable is marked, to ensure it is not punctured. Finally, the roofing material — metal, membrane, or other covering — is then installed directly over the panels. At ¼ inch finished height, the panels create no visible ridges or bumps in the finished roof surface, and provide ample nailing and fastening surface for the roofing contractor.

Yes. Invizimelt panels can be installed under deck surfaces as well as roofing materials — particularly where a solid subfloor is being used and the deck surface is stone, or some other continuous material needing a snow/ice melting system.
For snow melting systems for decks that installs on joists, please see our Deck Pan Heating System.

Invizimelt is compatible with all roofing materials — including standing seam metal roofing, corrugated metal, membrane roofing, slate, asphalt shingles, and composite shingles. It is the only listed system approved for installation under metal roofing surfaces. For non-metal shingle applications such as asphalt or wood shake where no panel system is needed, ZMesh is the recommended alternative — it lays directly under shingles without any panel or heatsink.

Aluminum transfers heat significantly faster than cementitious materials such as concrete or mortar. When Tuff Cable is covered with aluminum tape inside the Invizimelt panel, 100% of the cable’s heat output is directed upward into the panel surface — none is lost downward into the substrate below. A cementitious heatsink absorbs and stores heat more slowly and loses some of it downward into the sub-roof. Invizimelt’s aluminum construction means the system reaches operating temperature faster, responds more quickly to changing weather conditions, and uses energy more efficiently.

Invizimelt is Heatizon’s patented aluminum panel system for under-roof and under-deck deicing. Tuff Cable low-voltage heating cable snaps directly into the aluminum panels, which are then installed beneath the roofing or decking material — completely concealed from view. The aluminum panels act as a heatsink, rapidly distributing heat from the cable across the full panel surface and up through the roofing material above, melting snow and ice from the eaves, valleys, and roof edge before ice dams can form. Invizimelt is for exclusive use with Heatizon’s Tuff Cable.

Tuff Cable installed in Invizimelt Panels is compatible with all roofing materials — including metal roofing, non-metal shingles (asphalt, composite, wood shake, tile), membranes, valley metal, flashing, and metal drip edges. This makes Tuff Cable the more versatile of Heatizon’s two under-roof heating elements: where ZMesh is limited to non-conductive materials, Tuff Cable embedded in a heatsink works under any roof covering.

Invizimelt is Heatizon’s patented aluminum panel system designed for under-roof deicing. Tuff Cable snaps into the Invizimelt Panel channels, which then act as a heatsink — distributing heat evenly across the panel surface and up through the roofing material above. The aluminum construction provides rapid, efficient heat transfer compared to cementitious heatsink materials. Invizimelt Panels are modular, available in different sizes to fit varying roof pitches and valleys, and can be installed on new construction or retrofitted over the roof edge on existing roofs.

Yes. Tuff Cable, installed in Heatizon’s Invizimelt Panel, is the only listed system for snow and ice melting under metal roofing, valley metal, flashing, and metal drip edges. This under-metal-roof listing is covered under UL Standard 1588 and ETL certified — the same standard that makes Heatizon’s products the only under-roof systems compliant with NEC Article 426. Tuff Cable must always be fully embedded in the Invizimelt Panel for metal roof applications — it cannot be laid directly against metal roofing surfaces without a heatsink material.

Yes. Tuff Cable is the only low-voltage heating cable designed to withstand hot-pour asphalt installation. Its 10-gauge coated copper construction and chemical resistance allow it to survive the temperatures and chemical composition of freshly poured asphalt — making it the only practical low-voltage option for new asphalt driveway and roadway snow melting applications. In a two-pour asphalt installation, Tuff Cable is laid on the binder or base coat layer, and the final asphalt surface layer is poured directly over it.

Yes. Tuff Cable is listed by Intertek (ETL) — an OSHA-recognized Nationally Recognized Testing Laboratory — to UL and CSA standards for snow and ice melting on surfaces and roofs, and for interior floor heating applications. Together with ZMesh, Tuff Cable is one of only two products in the world authorized under UL Standard 1588 for snow and ice melting installed under roofing materials. All Heatizon systems are designed to ASHRAE standards for heating load calculation and energy efficiency.

Tuff Cable and ZMesh are both Heatizon low-voltage heating elements and both are ETL listed under UL Standard 1588 for under-roof snow melting — but they are designed for different installation methods. Tuff Cable is a round copper cable that must always be embedded in a heatsink material (concrete, asphalt, mortar, Invizimelt panel). ZMesh is a flat bronze mesh that lays directly beneath flooring or roofing without any embed. Tuff Cable is the right choice where a heatsink is present or required — driveways, metal roofs, floor overlays. ZMesh is the right choice where no embed is possible or desired — under non-metal shingles, hardwood floors, and carpet.

Tuff Cable carries an industry-leading 25-year manufacturer’s warranty — the longest available for any electric radiant heating cable in its category. The warranty reflects the cable’s construction: 10-gauge coated copper heating cable that gets embedded in a protective heatsink, with footage marks for verifiable installation, and a low-voltage design that reduces electrical stress on the insulation over time. Heatizon has documented installations from decades ago that remain fully operational.

Tuff Cable is a low-voltage system powered by a step-down transformer that reduces the supply voltage — typically 120V, 208V, 240V, or 277V AC — to 65 volts or less at the cable. This low operating voltage is one of Tuff Cable’s key safety advantages over line-voltage systems, and it also allows the cable to be cut and spliced in the field, and to be installed in surfaces where line-voltage systems are not permitted or practical.

ZMesh is a cut-to-length product, unlike most UL-listed radiant heating cables which are fixed-length. This gives installers flexibility to size each run precisely to the space — eliminating the waste and design constraints of fixed-length systems. ZMesh is available in rolls from 50 to 400 feet and can be cut on site to the exact length required by the project layout.

Yes. ZMesh is one of the only radiant heating elements on the market that can be repaired in the field if cut or damaged. Repair requires a customized copper splice plate and solder — a straightforward process compared to the full element replacement required by most competing fixed-length heating cables. This repairability is a meaningful long-term advantage, particularly for installations that may be subject to renovation or remodeling work years after the original installation.

Yes — provided the nail, screw, or staple does not make contact with any other electrically conductive material. ZMesh can be nailed and stapled through freely during roofing and flooring installation, which is one of its key practical advantages over conventional heating cables. This eliminates the need to plan fastener locations around the heating element and allows standard roofing and flooring installation techniques to proceed unmodified.

ZMesh roof deicing systems can be activated automatically using an aerial-mounted snow and moisture sensor that triggers the system when the temperature drops below 38°F and moisture is detected. Additional activation options include a gutter-mounted switch, a temperature-only sensor, a 12-hour manual timer, WIFI-controlled, and weather-predicting activation (coming soon). Automatic activation is strongly recommended — it ensures the system activates before ice begins to form, which is more effective and energy-efficient than reactive manual operation.

Yes, with roofing contractor involvement. Installing ZMesh in an existing roof requires removing shingles along the eaves and up valleys where ice dams typically form, laying ZMesh on the sub-roof with a layer of ice-and-water shield over the top, then relaying the shingles. While this involves labor, it is less disruptive than a full re-roof and results in a permanent, invisible system. ZMesh is particularly well suited to installation during planned re-roofing projects, eliminating the need for future disruption.

ZMesh is compatible with all non-conductive roofing materials, including asphalt shingles, composite shingles, wood shake, fiberglass shingles, slate, tile, and membrane roof coverings. Before specifying ZMesh under a membrane, confirm that neither the membrane material nor its adhesive will be adversely affected by the bronze alloy — Heatizon’s design team can advise on compatibility for specific membrane products.

No. ZMesh is a bronze mesh element and must not be installed under or over metal roofing materials, valley metal, metal flashing, or other electrically conductive surfaces, as contact with metal can cause a short circuit. For metal roof deicing applications, Heatizon recommends Tuff Cable installed in Heatizon’s patented Invizimelt panel system — which are specifically engineered and listed for under-metal-roof deicing.

ZMesh carries an industry-leading 25-year manufacturer’s warranty. The long warranty is backed by the product’s construction: because ZMesh is installed under roofing or flooring rather than exposed to the elements, it is protected from UV damage, physical impact, and weathering. Heatizon’s distributors have documented ZMesh installations from decades ago that remain fully operational and visually unchanged. In most installations, ZMesh will outlast the roofing or flooring material installed above it.

Yes. ZMesh (along with Heatizon’s Tuff Cable) is the only product authorized under UL Standard 1588 and ETL listed in the United States and Canada for snow and ice melting installed under roofing materials. This makes Heatizon’s under-roof systems the only products compliant with NEC Article 426 for under-roof and enclosed panel heating applications. No other manufacturer’s under-shingle heating product holds this listing.

The width choice affects heat output, not coverage area. The 9-inch mesh allows more runs to be placed in a given space, resulting in higher watts per square foot — up to 13 watts per square foot — making it the recommended choice for roof deicing where aggressive snow and ice melting is needed. The 12-inch mesh produces a lower watt density, which is better suited for radiant floor heating where even, gentle warmth is the goal. Heatizon’s design team specifies the appropriate width for each project based on application and local climate.

ZMesh serves two distinct applications: under-shingle roof deicing and ice dam prevention, and radiant floor and space heating. For roof applications, ZMesh is installed beneath non-conductive shingles, membranes, and wood decking to melt snow and ice from eaves and valleys. For floor applications, ZMesh is installed beneath virtually any non-conductive floor covering — including hardwood, tile, stone, carpet, engineered wood, linoleum, and vinyl — to provide even, comfortable radiant warmth. Both applications use the same physical element; the installation method and wattage configuration differ by use case.

ZMesh is a woven bright bronze metal mesh heating element manufactured by Heatizon Systems. It resembles screen door material in appearance and is approximately 1/16 inch thick, available in 9-inch and 12-inch widths and in lengths from 50 to 400 feet. The bronze construction is highly durable, fully recyclable, and designed to outlast the roofing or flooring installed above it. ZMesh has been in continuous production and use since 1979.

GutterMelt SR Cables are self regulating and do not over heat.  The heat output of these cables increase as the surrounding temperature decreases and output decreases as surrounding temperatures increase.  GutterMelt is perfectly fine to use with plastic downspouts due to these self regulating heating characteristics.

Our gutter heating cables (GutterMelt) are the ideal solutions for preventing dangerous and damaging snow and ice forming.  It is recommended that gutter melting cables be used in conjunction with our roof systems.  Our cable systems are also activated by automatic sensors that sit in the gutter.  And conserve energy by only turning on when necessary.

The Tuff Cable Invizimelt/Heat Sink kits for roof deicing are designed to be installed under metal roof, valley metal and flashing.  Tuff Cable must always be embedded completely in an Invizimelt/Heat Sink system regardless of which roof covering is going over it.

Tuff Cable is a resistance heating wire that is very durable, 10 gauge coated copper cable that is chemical resistant and comes with footage marks on the wire.  The Tuff Cable has been engineered to work as a low-voltage system.

ZMesh was first used over 28 years ago.  Since 1979 the 9” ZMesh systems have been sold worldwide and are still in operation.

ZMesh is ETL listed for the United States and Canada and conforms to UL Standard 1588.  Heatizon Systems Roof Snow and Ice Melt products are the only products available today that are listed for under-roof applications.

ZMesh comes with an industry leading, 25-year manufacturer’s warranty.

It is not recommended that you use ZMesh underneath a metal roof. We recommended that Tuff Cable in Invizimelt/Heat Sink be used instead.

Roof deicing systems can be activated with an aerial-mounted moisture and temperature sensor, temperature sensor, gutter –mounted switch, or 12 hour manual timer.  With the aerial-mounted moisture and temperature sensor with automatically turn on when the temperature is below 38 degrees and there is moisture on the sensor.

The largest 9” ZMesh system (zone) will cover approximately 425 square feet.  Multiple zones are sometimes required for larger projects.

9” ZMesh is sandwiched in between two layers of ice and water shield and stapled to the roof decking.  Shingles are then secured with nails directly on top.  Nails can pierce the ZMesh as long as the nails do not come in contact with any other metal objects.  The ZMesh comes in 9” wide rolls and is rolled out over the area to be heated.  Heating at least 6” above the roof eaves is recommended.

No, because it is “paper thin” no roof buildup or construction alteration is required.  ZMesh is 1/32” thick and 1/6” on the fold back.  This is not the case with other types of radiant heat systems.

ZMesh is a 9” or 12” wide durable bronze heating element that resembles screen door material.  It is used to melt ice and snow off roofs and is listed to be installed under shingles to UL standard 1588.

ZMesh is installed under shingles for several reasons.  Heatizon offers a long term solution to winter roof problems and we believe in do the project once and do it right.  ZMesh is protected when it is installed under the shingles and in most cases will outlast the roofing above. Thinking long term we offer an invisible solution as well as the longevity of a system that will perform for the long term so the customer will never have to worry again about winter roof problems. To install ZMesh existing shingles will need to be removed by a roofing contractor so it can be installed on the sub-roof with a layer of ice and water shield over the top of the system before shingles are installed back over it.

Yes, ZMesh can be installed over any membrane and covered with an additional membrane.

Since 1979, Tuff Cable systems have been sold worldwide and are still in operation, worry free.

Tuff Cable comes with an industry leading, 25-year manufacturer’s warranty.
Tuff Cable is ETL Listed for snow and ice melting on surfaces and roofs and for interior floor heating applications.

Tuff Cable is ETL Listed for the United States and Canada and conforms to UL Standard 1588 Heatizon Systems Roof Snow and Ice Melt products are the only products available today that are listed for under-roof applications.

All Hott-Wire systems are custom-designed to ASHRAE standards — the American Society of Heating, Refrigeration and Air-Conditioning Engineers’ snow melting data provides region-specific watt-per-square-foot targets that account for local snowfall rates, ambient temperatures, and wind exposure. Cable spacing is calculated to meet the required watt density for the installation region. The MI variant must be ordered to exact length once the design is finalised; the self-regulating variant can be cut to length on site. Contact a Heatizon distributor to begin the design process for your project.

Hott-Wire snow melting systems are activated by a relay panel or contactor panel, which allows a single activation device to control multiple heating circuits simultaneously — essential for larger commercial installations covering thousands of square feet. Smaller systems can connect the activation device directly to the heating element without a separate relay panel. Automatic snow and ice detection sensors are the recommended activation method, triggering the system when temperature drops below 38°F and moisture is detected — eliminating the need for manual switching. More advanced activation methods, WIFI, weather-predicting, and BAS/BMS integration is also available.

Yes. Hott-Wire can be retrofitted into existing concrete and asphalt surfaces using a saw-cut method — channels are cut into the existing surface, the cable is laid into the channels, and the surface is patched with a compatible overlay material. This approach delivers performance comparable to a new-pour installation without the cost and disruption of full surface removal and replacement.

Like Tuff Cable, Hott-Wire systems use jumpers — steel and aluminum brackets covering the Hott-Wire cable — to protect the cable where it passes through concrete crack control joints and expansion joints. The jumper encases the cable so slab movement cannot apply mechanical stress to the heating element at the joint location. Proper jumper installation at every joint is essential for long-term system reliability in concrete applications.

Hott-Wire can be installed in new-pour concrete, hot-pour asphalt, sand or stone dust beds under pavers, and retrofit into existing concrete or asphalt surfaces via saw cut. Its MI construction withstands the temperatures and pressures of hot-pour asphalt installation — a capability shared with Tuff Cable but not available in most competing line-voltage heating cables. Hott-Wire is suitable for driveways, walkways, parking areas, loading docks, ramps, stairs, and any other paved exterior surface requiring snow melting.

Choose MI Hott-Wire for large commercial and industrial surfaces, projects with high snow load requirements, installations in severe northern climates, and any application where maximum watt output and long-term performance are the priority. MI cable delivers consistent, precise output regardless of temperature and is the more durable long-term option. Choose self-regulating Hott-Wire for smaller or irregularly shaped areas, retrofit projects where the exact layout isn’t finalised before ordering, or applications in milder climates where the lower maximum output of self-regulating cable is sufficient. Contact a Heatizon distributor to determine the right variant for your specific project.

Self-regulating cable automatically adjusts its heat output based on the surrounding temperature — producing more heat when conditions are colder and less when they are warmer. This means the cable never overheats and cannot be damaged by overlapping or bundling, making installation more forgiving than fixed-output MI cable. Unlike the MI variant, self-regulating Hott-Wire is cut to length in the field — no pre-ordering to exact specifications required. The tradeoff is that self-regulating cable has lower maximum output than MI cable and is typically chosen for applications where the installation layout is less predictable or where the moderate output of a self-regulating system is sufficient for the climate and surface area.

Yes. The mineral-insulated Hott-Wire cable is a fixed-length product — it is manufactured to the exact length required for the project and cannot be shortened or extended in the field. This requires the system to be designed and sized before the cable is ordered. Watt output per lineal foot is determined by project requirements — spacing between runs is calculated to meet the ASHRAE snow melting watt-per-square-foot target for the installation region. The self-regulating variant of Hott-Wire, by contrast, is cut to length in the field.

Cold leads are the non-heating cable sections that connect the heating element to the electrical panel. On standard MI cables, cold leads must be spliced onto the heating element on-site during installation — a process that requires special tools, adds labor time, and introduces a potential failure point at the splice. Hott-Wire’s MI cable comes with cold leads pre-connected at the factory, eliminating field splicing entirely. The installer simply routes the cold leads from the heating zone to the panel and terminates them — a straightforward connection with no specialized splicing equipment required.

Most MI cables use magnesium oxide (MgO) as the mineral insulation — but MgO is hygroscopic, meaning it absorbs moisture from the environment over time. Moisture absorption degrades the insulation and can eventually cause cable failure. Hott-Wire uses inert fiberglass insulation instead, which does not absorb moisture. This makes Hott-Wire more resistant to the humidity and freeze-thaw cycles encountered in outdoor snow melting installations, and contributes directly to its 10-year warranty longevity. This is a specific engineering improvement over standard MgO MI cable construction.

A mineral-insulated (MI) heating cable consists of a central metal conductor surrounded by a compressed mineral insulation — in Hott-Wire’s case, inert fiberglass — encased in a copper outer tube and coated with an HDPE jacket. MI cable technology was first patented in 1896 and has been used in critical applications including nuclear reactors, fire alarm systems, military equipment, and emergency infrastructure precisely because of its extraordinary durability and resistance to mechanical damage, high temperatures, and moisture. Heatizon’s Hott-Wire brings this industrial-grade construction to snow melting applications, engineered specifically for radiant heating performance.

Yes. Hott-Wire is ETL listed for snow and ice melting applications — certified by Intertek, an OSHA-recognized Nationally Recognized Testing Laboratory carrying equal legal standing to UL and CSA listings in the United States. All Heatizon systems are designed to ASHRAE standards for snow melting load calculations by region.

Hott-Wire carries a 10-year manufacturer’s warranty — the longest available in the line-voltage mineral-insulated heating cable category. The warranty is backed by the cable’s MI construction: a copper conductor in fiberglass insulation inside a copper tube, which provides exceptional resistance to moisture, mechanical damage, and the temperature extremes encountered in outdoor snow melting applications.

Hott-Wire operates at line voltage — 208V, 240V, or 277V AC supplied directly from the building’s electrical panel. Hott-wire MI can also accommodate 480V and 600V (Canada). Smaller systems typically use a 208V, 240V, or 277V supply with a 30-amp breaker; larger area installations use a double-pole 40-amp breaker. Unlike Heatizon’s Tuff Cable, Hott-Wire does not require a step-down transformer — the cable connects directly to the line voltage supply through a relay or contactor panel.

The primary difference is voltage. Tuff Cable is a low-voltage system — it operates at 65 volts or less via a step-down transformer, making it well suited to mid-size residential and commercial projects and roof deicing applications. Hott-Wire is a line-voltage system running at 208V, 240V, or 277V directly from the supply — no transformer required — making it more practical for large commercial and industrial snow melting surfaces where higher wattage output and simpler electrical integration are priorities. Both cables can be installed in concrete, asphalt, pavers, and retrofit saw cuts, and both are rated for hot-pour asphalt. Tuff Cable also carries a UL 1588 listing for under-roof applications; Hott-Wire does not.

Hott-Wire is Heatizon’s line-voltage electric snow melting and radiant heating cable — available in two configurations. The first is a mineral-insulated (MI) fixed-length cable: a central copper conductor surrounded by fiberglass insulation compressed inside a copper tube with an HDPE jacket, factory-terminated with pre-connected cold leads. The second is a self-regulating cut-to-length cable that automatically adjusts its heat output based on ambient temperature. Both variants run at line voltage — 208V, 240V, or 277V (480 and 600 volts for the MI version) — without a step-down transformer, and both are custom-designed to ASHRAE standards for each project.

All Tuff Cable snow melting systems are custom-designed to ASHRAE standards, taking into account the project’s geographic location, local snowfall data, surface area, and slab type. Heatizon’s design team calculates the required wattage, run spacing, and transformer sizing for each project. This design service is included with every Tuff Cable system and is provided before materials are ordered. Layout drawings can be provided for special circumstances and/or large/specified projects.

Tuff Cable is suitable for snow melting in concrete, asphalt, mortar beds under pavers or stone, and overlay systems over existing surfaces. It is used for driveways, walkways, entryways, parking areas, loading docks, stairs, and ramps — both residential and commercial. It can also be installed under pavers in a sand or mortar bed, and can be retrofitted into existing concrete or asphalt via saw cut.

Yes. Tuff Cable can be retrofit into existing concrete and asphalt surfaces using a saw-cut method. Channels are cut into the existing surface, Tuff Cable is laid into the channels, covered with a backer rod, and the surface is patched with a compatible overlay material and/or a sealant. This retrofit approach delivers performance equivalent to a new-pour installation at a fraction of the cost and disruption of full removal and replacement. Heatizon’s design team provides retrofit layouts and specifications as part of the standard project design service.

The Joint Jumper Kit is a Tuff Cable-exclusive accessory that allows the heating element to safely bypass expansion joints and control joints in concrete installations. Without it, running a heating cable directly through a concrete joint creates a stress point where cracking or movement in the slab can damage or sever the cable. The Joint Jumper Kit connects the Tuff Cable to a cold lead that passes under the joint, then reconnects to the Tuff Cable on the other side — allowing the concrete to move and shift without putting mechanical stress on the heating element. This makes Tuff Cable the only snow melting cable that can be reliably installed across multi-section concrete slabs, stairways, and driveways with multiple expansion joints.

Yes. Tuff Cable is the only low-voltage heating cable designed to withstand hot-pour asphalt installation. Its 10-gauge coated copper construction and chemical resistance allow it to survive the temperatures and chemical composition of freshly poured asphalt — making it the only practical low-voltage option for new asphalt driveway and roadway snow melting applications. In a two-pour asphalt installation, Tuff Cable is laid on the binder or base coat layer, and the final asphalt surface layer is poured directly over it.

Yes. Tuff Cable is listed by Intertek (ETL) — an OSHA-recognized Nationally Recognized Testing Laboratory — to UL and CSA standards for snow and ice melting on surfaces and roofs, and for interior floor heating applications. Together with ZMesh, Tuff Cable is one of only two products in the world authorized under UL Standard 1588 for snow and ice melting installed under roofing materials. All Heatizon systems are designed to ASHRAE standards for heating load calculation and energy efficiency.

Tuff Cable and ZMesh are both Heatizon low-voltage heating elements and both are ETL listed under UL Standard 1588 for under-roof snow melting — but they are designed for different installation methods. Tuff Cable is a round copper cable that must always be embedded in a heatsink material (concrete, asphalt, mortar, Invizimelt panel). ZMesh is a flat bronze mesh that lays directly beneath flooring or roofing without any embed. Tuff Cable is the right choice where a heatsink is present or required — driveways, metal roofs, floor overlays. ZMesh is the right choice where no embed is possible or desired — under non-metal shingles, hardwood floors, and carpet.

Tuff Cable carries an industry-leading 25-year manufacturer’s warranty — the longest available for any electric radiant heating cable in its category. The warranty reflects the cable’s construction: 10-gauge coated copper heating cable that gets embedded in a protective heatsink, with footage marks for verifiable installation, and a low-voltage design that reduces electrical stress on the insulation over time. Heatizon has documented installations from decades ago that remain fully operational.

Tuff Cable is a low-voltage system powered by a step-down transformer that reduces the supply voltage — typically 120V, 208V, 240V, or 277V AC — to 65 volts or less at the cable. This low operating voltage is one of Tuff Cable’s key safety advantages over line-voltage systems, and it also allows the cable to be cut and spliced in the field, and to be installed in surfaces where line-voltage systems are not permitted or practical.

Tuff Cable is a low-voltage electric radiant heating cable made from a specially-engineered copper heating wire (approximately 10-gauge), manufactured by Heatizon Systems. It is chemical and gasoline resistant, comes with footage marks printed along the cable for easy layout verification, and is designed to always be embedded in a heatsink material — such as concrete, asphalt, mortar, stone, pavers, or Heatizon’s Invizimelt Panel. Tuff Cable is a cut-to-length product, giving installers precise control over system sizing without material waste.

Yes. For complete winter weather protection on a rooftop or elevated deck, the pedestal paver system integrates naturally with other Heatizon products. Invizimelt and ZMesh can protect surrounding roof membrane and low-slope areas, while GutterMelt addresses gutters and downspouts. Using these systems together eliminates all potential drainage blockage points in a single, coordinated installation.

Snow and ice accumulation on rooftop pedestal paver installations can block drainage pathways, leading to standing water, ice dams, and structural loading concerns. Heatizon’s system melts snow and ice at the paver surface, allowing meltwater to flow freely through the gaps between pavers and into the roof’s drainage system. For complete drainage protection, the pedestal paver system can be combined with Heatizon’s Invizimelt, ZMesh, or GutterMelt products to address drains, gutters, and surrounding surfaces.

Yes. Heatizon offers full project design assistance and ongoing project support for pedestal paver snow melting installations. This includes reviewing project drawings, calculating heating loads, confirming paver and pedestal compatibility, and providing installation layouts. This service is included with the system package and is designed to ensure correct performance from installation through operation.

The Heatizon pedestal paver snow melting system is sold as a complete, patented package. Each package includes: the insulated heating pans, the Hott-Wire line-voltage mineral-insulated heating cable, GFEP-protected relay panel(s), an automatic snow/ice detection activator, installation layout drawings, and select accessories. Note that pedestals themselves are not included, as these are typically sourced separately based on project specifications.

Heatizon’s snow melting system is compatible with leading pedestal systems used in commercial and residential construction. The system ships with project-specific layout drawings to ensure correct fit. Contact Heatizon’s design team for confirmation of compatibility with a specific pedestal brand or profile.

The Heatizon pedestal paver system accommodates several common paver sizes. Because the heating pan is engineered to fit beneath the paver rather than being embedded in it, variations in paver dimensions are not an obstacle. Heatizon’s design team provides system layouts specific to each project, confirming compatibility with the pavers and pedestal system in use before installation begins.

Yes. Heatizon’s pedestal paver heating system is designed to be retrofitted into existing pedestal paver installations. The heating pans are sized to accommodate a range of common paver dimensions, so in most cases the pavers can be lifted, the pans installed beneath them, and the pavers relaid — without requiring full demolition or replacement of the pedestal substructure.

Heatizon’s pedestal paver snow melting system supports 208V, 240V, 277V, and 480V supply voltages. This range of compatibility ensures the system can be integrated into most commercial and residential electrical configurations without requiring a dedicated transformer or voltage conversion.

The Heatizon pedestal paver system uses an custom engineered aluminum insulated pan that sits directly beneath each paver. The Hott-Wire heating cable runs inside the pan, and because the pan is insulated on the underside, heat is directed upward into the paver rather than lost downward. This focused transfer makes the system more energy-efficient than systems without directional insulation, and allows the paver surface itself to act as the melting surface.

A pedestal paver snow melting system is an electric radiant heating solution designed for elevated, open-air spaces where pavers sit on adjustable pedestals — such as rooftop terraces, decks, and plaza surfaces. Heatizon’s patented system fits an insulated heating pan beneath each paver, containing a Hott-Wire mineral-insulated heating cable. When activated, the cable heats the pan, which transfers warmth directly up through the paver surface to melt accumulated snow and ice, keeping drainage pathways clear and the space safe to use year-round.

MI Cables were first invented in 1896 and have been in use since the early 1900’s.  These durable cables are a reliable system and Hott-Wire has been specially engineered for radiant heating being resistant to water absorption. The inert fiberglass reduces cable breakdown unlike Magnesium Oxide MI Cables. Hott-Wire has been sold worldwide.

The average operational cost for a snow melting system is approximately $0.18 per 100 square feet per hour.  This figure is based on a system producing 22 watts/sq. ft. or 73.7 BTU’s/sq. ft. with a kwh rate of $0.08 per hour (the national average kwh is $0.08/hour).  If you know the square feet of the area you wish to heat and your kwh rate, you can calculate the operational costs with this formula: heatable sq. ft. times watts/sq. ft., divided by 1000, times your kwh rate.

Hott-Wire systems can be activated with an aerial mounted moisture and temperature sensor, temperature sensor, pavement-mounted snow sensor, or 12 hour timer. The aerial and pavement mounted sensor will automatically turn on when the temperature is below 38 degrees and there is moisture on the sensor. Heatizon has its own engineered relay panel (M330) offering 30Amp or 50Amp relay switches for single activation of multiple circuits.

Hott-Wire heating cable is the perfect choice for snow melting in driveways, sidewalks and stairs. Hott-Wire systems can be installed in new pour concrete or asphalt, under tile or pavers in a sand bed, and can be retrofitted into existing concrete or asphalt.

Hott-Wire comes with an industry leading, 10-year manufacturer’s warranty. Hott-Wire is ETL Listed for snow and ice melting applications.

The power requirements vary from system to system.  Generally Hott-Wire heating systems require a 208, 240, or 277 volt supply 30 Amp breaker for smaller areas. For larger areas a double pole 40 Amp breaker is used. Systems are designed to ASHRAE standards and vary in size and load depending on region and application

Hott-Wire is a resistance Mineral Insulated heating cable that is very durable. Hott-Wire is a fixed length line voltage element consisting of a central single or dual conductor surrounded by fiberglass inert insulation compressed in a Copper tube, which is coated with an HDPE Jacket.  Hott-Wire has been engineered to work as a line voltage system.

Since 1979, Tuff Cable systems have been sold worldwide and are still in operation, worry free.

Tuff Cable comes with an industry leading, 25-year manufacturer’s warranty.
Tuff Cable is ETL Listed for snow and ice melting on surfaces and roofs and for interior floor heating applications.

Tuff Cable systems can be activated with an aerial mounted moisture and temperature sensor, temperature sensor, pavement-mounted snow sensor, or 12 hour timer.  The aerial and pavement mounted sensor will automatically turn on when the temperature is below 38 degrees and there is moisture on the sensor.

Tuff Cable heating element is the perfect choice for snow melting in driveways, sidewalks and stairs. Tuff Cable systems can be installed in new pour concrete, under tile or pavers in a sand bed, and can be retrofitted into existing concrete or asphalt.

Tuff Cable is a resistance heating wire that is very durable, 10 gauge coated copper cable that is chemical resistant and comes with footage marks on the wire.  The Tuff Cable has been engineered to work as a low-voltage system.

Tuff Cable can be retrofit in any asphalt, concrete, or cementitious base.

Yes — unlike ZMesh, Tuff Cable must always be embedded in a heatsink material. For floor heating, this is typically a mortar bed, concrete slab, or self-leveling cementitious compound. The heatsink stores and distributes the heat from the cable evenly across the floor surface. This requirement adds some installation complexity compared to mesh-based systems, but results in excellent, even heat distribution and long cable life due to the protection the embed provides.

Yes. Tuff Cable floor systems can be designed for both supplemental floor warming — where the primary heat source is a furnace or boiler — and total space heating, where the radiant floor system provides all the heat for the space. Total space heating applications require higher wattage and closer run spacing than floor warming. Heatizon’s design team determines the correct configuration based on room dimensions, insulation levels, heat loss calculations (provided by the project’s engineer), and climate data.

Tuff Cable is compatible with almost all floor coverings where a heatsink material is present in the floor assembly — including hardwood, carpet, tile, laminate, engineered wood, linoleum, and vinyl. The heatsink is typically concrete, a mortar bed, or a self-leveling compound into which the Tuff Cable is embedded before the floor covering is installed. Unlike ZMesh, Tuff Cable requires this heatsink layer — it cannot be installed directly under flooring without an embed.

Yes. Tuff Cable is listed by Intertek (ETL) — an OSHA-recognized Nationally Recognized Testing Laboratory — to UL and CSA standards for snow and ice melting on surfaces and roofs, and for interior floor heating applications. Together with ZMesh, Tuff Cable is one of only two products in the world authorized under UL Standard 1588 for snow and ice melting installed under roofing materials. All Heatizon systems are designed to ASHRAE standards for heating load calculation and energy efficiency.

Tuff Cable and ZMesh are both Heatizon low-voltage heating elements and both are ETL listed under UL Standard 1588 for under-roof snow melting — but they are designed for different installation methods. Tuff Cable is a round copper cable that must always be embedded in a heatsink material (concrete, asphalt, mortar, Invizimelt panel). ZMesh is a flat bronze mesh that lays directly beneath flooring or roofing without any embed. Tuff Cable is the right choice where a heatsink is present or required — driveways, metal roofs, floor overlays. ZMesh is the right choice where no embed is possible or desired — under non-metal shingles, hardwood floors, and carpet.

Tuff Cable carries an industry-leading 25-year manufacturer’s warranty — the longest available for any electric radiant heating cable in its category. The warranty reflects the cable’s construction: 10-gauge coated copper heating cable that gets embedded in a protective heatsink, with footage marks for verifiable installation, and a low-voltage design that reduces electrical stress on the insulation over time. Heatizon has documented installations from decades ago that remain fully operational.

Tuff Cable is a low-voltage system powered by a step-down transformer that reduces the supply voltage — typically 120V, 208V, 240V, or 277V AC — to 65 volts or less at the cable. This low operating voltage is one of Tuff Cable’s key safety advantages over line-voltage systems, and it also allows the cable to be cut and spliced in the field, and to be installed in surfaces where line-voltage systems are not permitted or practical.

Tuff Cable is a low-voltage electric radiant heating cable made from a specially-engineered copper heating wire (approximately 10-gauge), manufactured by Heatizon Systems. It is chemical and gasoline resistant, comes with footage marks printed along the cable for easy layout verification, and is designed to always be embedded in a heatsink material — such as concrete, asphalt, mortar, stone, pavers, or Heatizon’s Invizimelt Panel. Tuff Cable is a cut-to-length product, giving installers precise control over system sizing without material waste.

All Tuff Cable snow melting systems are custom-designed to ASHRAE standards, taking into account the project’s geographic location, local snowfall data, surface area, and slab type. Heatizon’s design team calculates the required wattage, run spacing, and transformer sizing for each project. This design service is included with every Tuff Cable system and is provided before materials are ordered. Layout drawings can be provided for special circumstances and/or large/specified projects.

Tuff Cable is suitable for snow melting in concrete, asphalt, mortar beds under pavers or stone, and overlay systems over existing surfaces. It is used for driveways, walkways, entryways, parking areas, loading docks, stairs, and ramps — both residential and commercial. It can also be installed under pavers in a sand or mortar bed, and can be retrofitted into existing concrete or asphalt via saw cut.

Yes. Tuff Cable can be retrofit into existing concrete and asphalt surfaces using a saw-cut method. Channels are cut into the existing surface, Tuff Cable is laid into the channels, covered with a backer rod, and the surface is patched with a compatible overlay material and/or a sealant. This retrofit approach delivers performance equivalent to a new-pour installation at a fraction of the cost and disruption of full removal and replacement. Heatizon’s design team provides retrofit layouts and specifications as part of the standard project design service.

The Joint Jumper Kit is a Tuff Cable-exclusive accessory that allows the heating element to safely bypass expansion joints and control joints in concrete installations. Without it, running a heating cable directly through a concrete joint creates a stress point where cracking or movement in the slab can damage or sever the cable. The Joint Jumper Kit connects the Tuff Cable to a cold lead that passes under the joint, then reconnects to the Tuff Cable on the other side — allowing the concrete to move and shift without putting mechanical stress on the heating element. This makes Tuff Cable the only snow melting cable that can be reliably installed across multi-section concrete slabs, stairways, and driveways with multiple expansion joints.

Yes. Tuff Cable is the only low-voltage heating cable designed to withstand hot-pour asphalt installation. Its 10-gauge coated copper construction and chemical resistance allow it to survive the temperatures and chemical composition of freshly poured asphalt — making it the only practical low-voltage option for new asphalt driveway and roadway snow melting applications. In a two-pour asphalt installation, Tuff Cable is laid on the binder or base coat layer, and the final asphalt surface layer is poured directly over it.

Yes. Tuff Cable is listed by Intertek (ETL) — an OSHA-recognized Nationally Recognized Testing Laboratory — to UL and CSA standards for snow and ice melting on surfaces and roofs, and for interior floor heating applications. Together with ZMesh, Tuff Cable is one of only two products in the world authorized under UL Standard 1588 for snow and ice melting installed under roofing materials. All Heatizon systems are designed to ASHRAE standards for heating load calculation and energy efficiency.

Tuff Cable and ZMesh are both Heatizon low-voltage heating elements and both are ETL listed under UL Standard 1588 for under-roof snow melting — but they are designed for different installation methods. Tuff Cable is a round copper cable that must always be embedded in a heatsink material (concrete, asphalt, mortar, Invizimelt panel). ZMesh is a flat bronze mesh that lays directly beneath flooring or roofing without any embed. Tuff Cable is the right choice where a heatsink is present or required — driveways, metal roofs, floor overlays. ZMesh is the right choice where no embed is possible or desired — under non-metal shingles, hardwood floors, and carpet.

Tuff Cable carries an industry-leading 25-year manufacturer’s warranty — the longest available for any electric radiant heating cable in its category. The warranty reflects the cable’s construction: 10-gauge coated copper heating cable that gets embedded in a protective heatsink, with footage marks for verifiable installation, and a low-voltage design that reduces electrical stress on the insulation over time. Heatizon has documented installations from decades ago that remain fully operational.

Tuff Cable is a low-voltage system powered by a step-down transformer that reduces the supply voltage — typically 120V, 208V, 240V, or 277V AC — to 65 volts or less at the cable. This low operating voltage is one of Tuff Cable’s key safety advantages over line-voltage systems, and it also allows the cable to be cut and spliced in the field, and to be installed in surfaces where line-voltage systems are not permitted or practical.

Tuff Cable is a low-voltage electric radiant heating cable made from a specially-engineered copper heating wire (approximately 10-gauge), manufactured by Heatizon Systems. It is chemical and gasoline resistant, comes with footage marks printed along the cable for easy layout verification, and is designed to always be embedded in a heatsink material — such as concrete, asphalt, mortar, stone, pavers, or Heatizon’s Invizimelt Panel. Tuff Cable is a cut-to-length product, giving installers precise control over system sizing without material waste.

ZMesh is a cut-to-length product, unlike most UL-listed radiant heating cables which are fixed-length. This gives installers flexibility to size each run precisely to the space — eliminating the waste and design constraints of fixed-length systems. ZMesh is available in rolls from 50 to 400 feet and can be cut on site to the exact length required by the project layout.

Yes. ZMesh is one of the only radiant heating elements on the market that can be repaired in the field if cut or damaged. Repair requires a customized copper splice plate and solder — a straightforward process compared to the full element replacement required by most competing fixed-length heating cables. This repairability is a meaningful long-term advantage, particularly for installations that may be subject to renovation or remodeling work years after the original installation.

Yes — provided the nail, screw, or staple does not make contact with any other electrically conductive material. ZMesh can be nailed and stapled through freely during roofing and flooring installation, which is one of its key practical advantages over conventional heating cables. This eliminates the need to plan fastener locations around the heating element and allows standard roofing and flooring installation techniques to proceed unmodified.

Yes. ZMesh can be retrofitted between floor joists from an unfinished basement or crawlspace below, without disturbing the finished floor above. This makes it one of the only radiant heating elements that can be added to an existing home without any flooring removal — a significant advantage for renovation projects where disruption and cost need to be minimized.

Yes. ZMesh is well suited to hardwood floor heating. The 12-inch width is the standard recommendation for hardwood applications. Before installation, allow the hardwood to acclimate to the room’s humidity level for several weeks to minimize dimensional changes after heating begins. After laying and connecting ZMesh, test and then run the system for before nailing or stapling the hardwood to the subfloor — this allows the wood to adjust to its heated operating temperature. As with all radiant floor heating under hardwood, confirm with the flooring manufacturer that surface temperatures will not exceed 85°F.

No. Unlike most radiant heating cables that must be embedded in a mortar or self-leveling compound to transfer heat, ZMesh is installed directly beneath the floor covering without any mortar bed or heatsink embedment. Because ZMesh is only 1/16 inch thick, it adds virtually no height to the floor assembly — eliminating the cost of a cementitious mud bed, the structural upgrades needed to support its weight, and the installation complexity it introduces. This makes ZMesh one of the most practical radiant floor heating solutions for both new construction and retrofit projects.

ZMesh carries an industry-leading 25-year manufacturer’s warranty. The long warranty is backed by the product’s construction: because ZMesh is installed under roofing or flooring rather than exposed to the elements, it is protected from UV damage, physical impact, and weathering. Heatizon’s distributors have documented ZMesh installations from decades ago that remain fully operational and visually unchanged. In most installations, ZMesh will outlast the roofing or flooring material installed above it.

The width choice affects heat output, not coverage area. The 9-inch mesh allows more runs to be placed in a given space, resulting in higher watts per square foot — up to 13 watts per square foot — making it the recommended choice for roof deicing where aggressive snow and ice melting is needed. The 12-inch mesh produces a lower watt density, which is better suited for radiant floor heating where even, gentle warmth is the goal. Heatizon’s design team specifies the appropriate width for each project based on application and local climate.

ZMesh serves two distinct applications: under-shingle roof deicing and ice dam prevention, and radiant floor and space heating. For roof applications, ZMesh is installed beneath non-conductive shingles, membranes, and wood decking to melt snow and ice from eaves and valleys. For floor applications, ZMesh is installed beneath virtually any non-conductive floor covering — including hardwood, tile, stone, carpet, engineered wood, linoleum, and vinyl — to provide even, comfortable radiant warmth. Both applications use the same physical element; the installation method and wattage configuration differ by use case.

ZMesh is a woven bright bronze metal mesh heating element manufactured by Heatizon Systems. It resembles screen door material in appearance and is approximately 1/16 inch thick, available in 9-inch and 12-inch widths and in lengths from 50 to 400 feet. The bronze construction is highly durable, fully recyclable, and designed to outlast the roofing or flooring installed above it. ZMesh has been in continuous production and use since 1979.

ZMesh is a cut-to-length product, unlike most UL-listed radiant heating cables which are fixed-length. This gives installers flexibility to size each run precisely to the space — eliminating the waste and design constraints of fixed-length systems. ZMesh is available in rolls from 50 to 400 feet and can be cut on site to the exact length required by the project layout.

Yes. ZMesh is one of the only radiant heating elements on the market that can be repaired in the field if cut or damaged. Repair requires a customized copper splice plate and solder — a straightforward process compared to the full element replacement required by most competing fixed-length heating cables. This repairability is a meaningful long-term advantage, particularly for installations that may be subject to renovation or remodeling work years after the original installation.

Yes — provided the nail, screw, or staple does not make contact with any other electrically conductive material. ZMesh can be nailed and stapled through freely during roofing and flooring installation, which is one of its key practical advantages over conventional heating cables. This eliminates the need to plan fastener locations around the heating element and allows standard roofing and flooring installation techniques to proceed unmodified.

ZMesh roof deicing systems can be activated automatically using an aerial-mounted snow and moisture sensor that triggers the system when the temperature drops below 38°F and moisture is detected. Additional activation options include a gutter-mounted switch, a temperature-only sensor, a 12-hour manual timer, WIFI-controlled, and weather-predicting activation (coming soon). Automatic activation is strongly recommended — it ensures the system activates before ice begins to form, which is more effective and energy-efficient than reactive manual operation.

Yes, with roofing contractor involvement. Installing ZMesh in an existing roof requires removing shingles along the eaves and up valleys where ice dams typically form, laying ZMesh on the sub-roof with a layer of ice-and-water shield over the top, then relaying the shingles. While this involves labor, it is less disruptive than a full re-roof and results in a permanent, invisible system. ZMesh is particularly well suited to installation during planned re-roofing projects, eliminating the need for future disruption.

ZMesh is compatible with all non-conductive roofing materials, including asphalt shingles, composite shingles, wood shake, fiberglass shingles, slate, tile, and membrane roof coverings. Before specifying ZMesh under a membrane, confirm that neither the membrane material nor its adhesive will be adversely affected by the bronze alloy — Heatizon’s design team can advise on compatibility for specific membrane products.

No. ZMesh is a bronze mesh element and must not be installed under or over metal roofing materials, valley metal, metal flashing, or other electrically conductive surfaces, as contact with metal can cause a short circuit. For metal roof deicing applications, Heatizon recommends Tuff Cable installed in Heatizon’s patented Invizimelt panel system — which are specifically engineered and listed for under-metal-roof deicing.

ZMesh carries an industry-leading 25-year manufacturer’s warranty. The long warranty is backed by the product’s construction: because ZMesh is installed under roofing or flooring rather than exposed to the elements, it is protected from UV damage, physical impact, and weathering. Heatizon’s distributors have documented ZMesh installations from decades ago that remain fully operational and visually unchanged. In most installations, ZMesh will outlast the roofing or flooring material installed above it.

Yes. ZMesh (along with Heatizon’s Tuff Cable) is the only product authorized under UL Standard 1588 and ETL listed in the United States and Canada for snow and ice melting installed under roofing materials. This makes Heatizon’s under-roof systems the only products compliant with NEC Article 426 for under-roof and enclosed panel heating applications. No other manufacturer’s under-shingle heating product holds this listing.

The width choice affects heat output, not coverage area. The 9-inch mesh allows more runs to be placed in a given space, resulting in higher watts per square foot — up to 13 watts per square foot — making it the recommended choice for roof deicing where aggressive snow and ice melting is needed. The 12-inch mesh produces a lower watt density, which is better suited for radiant floor heating where even, gentle warmth is the goal. Heatizon’s design team specifies the appropriate width for each project based on application and local climate.

ZMesh serves two distinct applications: under-shingle roof deicing and ice dam prevention, and radiant floor and space heating. For roof applications, ZMesh is installed beneath non-conductive shingles, membranes, and wood decking to melt snow and ice from eaves and valleys. For floor applications, ZMesh is installed beneath virtually any non-conductive floor covering — including hardwood, tile, stone, carpet, engineered wood, linoleum, and vinyl — to provide even, comfortable radiant warmth. Both applications use the same physical element; the installation method and wattage configuration differ by use case.

ZMesh is a woven bright bronze metal mesh heating element manufactured by Heatizon Systems. It resembles screen door material in appearance and is approximately 1/16 inch thick, available in 9-inch and 12-inch widths and in lengths from 50 to 400 feet. The bronze construction is highly durable, fully recyclable, and designed to outlast the roofing or flooring installed above it. ZMesh has been in continuous production and use since 1979.