Install your WarmWire heating cables in a fast and easy method with the SunTouch HeatMatrix Uncoupling Mat. This 10 sq. ft. mat features waterproof underlay pads that work with the WarmWire heating cables to create an electric floor heating system under any type of tile. By minimizing stress caused from lateral, multi-directional movement within the substrate–a common cause of cracked tiles–this mat helps protect your tile investment. Suitable for below-grade installations.