Radiant Heat with Tuff Cable Tuff Cable is a durable 10 guage coated copper heating element that is chemical and gasoline resistant. Tuff Cable is designed to always be embeded into a heatsink. Examples of heatsinks are asphalt, concrete, mortar, pavers, stone, Heatizon Systems Heatsink Kit and Invizimelt Panel. The heat density of Tuff Cable heating element is dependent on the spacing between adjacent runs and length of element. Systems are custom designed to heat loss and ASHRAE standards. Tuff Cable is used for interior floor and space heating, exterior roof and deck deicing, ice dam prevention, and snow melting on concrete, asphalt or under pavers. Features: 25 Year Warranty 5 to 12 watts per lineal foot 100% efficient Thermostatically and Sensor Controlled Recyclable Materials Made in the United States Promotes Indoor Air Quality Interior Radiant Floor Heating with Tuff Cable: Interior radiant heat applications include floor and space heating for almost all floor coverings where heatsink capability is present. Exterior Tuff Cable : Exterior radiant heat applications that include snow melting for driveways, walks and other surfaces, ice dam prevention and roof and deck deicing under conductive shingles. Tuff Cable is used to melt snow under metal roofs to prevent ice dams and icicles, melt snow on concrete for walking surfaces, under pavers, and retrofit applications for existing surfaces.