Abstract: A waterproof shower module comprising a pre-fabricated, integrally molded unit which forms a unitary base having side walls and a pitched floor defining an opening within which is incorporated a vertically adjustable drain. Each side wall includes an upper lip forming a horizontal surface upon which wall board may be supported and flushly aligned with the side walls of the module such that a substantially continuous and uniform surface is formed which provides a suitable mounting surface for receiving shower tiles. The module floor includes a top surface and a bottom surface and defines a plurality of molded feet depending from the bottom surface, which feet function to support the module floor on the underlying subfloor. The module floor is uniformly pitched from each side wall to the drain opening. One of the side walls further defines a curb and includes inner and outer curb surfaces and a horizontal and curb surface. Tile installed on the module's surfaces and on the surrounding wall board.