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.