SunTouch’s HeatMatrix uncoupling membrane offers a fast, easy method of installing WarmWire electric heating cables. Polypropylene construction provides a barrier against surface water while deep grooved channels allow evaporation of moisture from below the membrane. One-ply, non-woven fleece on the membrane’s underside minimizes the stress caused by lateral, multi- directional movement within the substrate. Its flexibility makes it easy to adjust the layout so that the wire fits any space perfectly. The height of the membrane measures 0.24 inch (6 mm). Rolls are available in two sizes: 161 square feet and 40 square feet.