Luxurious Warmth Under Cold Floors. This product has been designed to gently warm flooring materials such as marble, ceramic, glass and porcelain tile; slate; granite and poured or dimensional stone, in addition to laminate and engineered hardwood products. Warm Tiles greatly enhances the comfort level of these beautiful flooring materials. Warm Tiles improves comfort throughout your home with a reliable, efficient and soothing floor warming system. Installation is simple and easy for a skilled do-it-yourselfer with the floor warming cable placed in the mortar underneath the tiles or engineered wood flooring. Warm Tiles can be placed directly over plywood, concrete or cement backerboard substrates.Warm Tiles floor warming systems utilize state-of-the-art heating cables, hardware and electrical controls for an economical and long lasting floor warming system. Warm Tiles systems are designed for use inside residential and commercial buildings of standard North American construction.