Uncoupling membranes are specifically designed for ceramic and stone tile installations. Membranes provide uncoupling to prevent cracked tile and grout. Made of polyethylene, serve as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. We carry membranes from Profilitec, Wedi, Kiesel, and Blanke.