Schluter®-KERDI-SHOWER-T/-TS/-TT are prefabricated sloped shower trays with integrated KERDI waterproofing that eliminate the need for a mortar bed. The trays are made of lightweight, expanded polystyrene (PS40) for constructing mortar-free shower bases. Each of these sloped, prefabricated shower trays are designed to integrate with the Schluter®-KERDI-DRAIN.