WonderFall Trench 48 in. x 48 in. Single Threshold Shower Base with Right Drain and Tileable Trench Grate Roof panels accessories 1 heating elements 1 heating elements Kerdi is a pliable sheet applied polyethylene waterproofing membrane and vapor retarder for use with tile Eliminates water damage which can lead to mold and mildew Features an anchoring fleece on both sides to anchor the membrane in unmodified thin set mortar Ideal for waterproofing in conjunction with tiled surfaces on walls Emits zero VOCs and can contribute towards achieving green building credits Guarantees uniform thickness Listed by cUPC and evaluated by ICC ES Measures 3 ft 3 in x 16 ft 5 in = 54 sq ft tileable shower base with an integrated linear trench drain that offers a slot drain right against the shower wall