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.