Patent ID: 8918926

Claim:
An improved one-piece shower pan assembly, comprising: a. a section of extruded foam having a generally flat bottom surface and a floor surface having a central drain hole; b. a recessed area formed in the floor surface around the drain hole for positioning a height adjustable drain assembly; c. an adjustable flat insert, for covering with tile members similar to tile members of a shower floor, positioned above the drain assembly within the recessed area so that the upper surface of the flat insert is flush with the floor surface; d. a plurality of drain channels on an upper surface of the adjustable flat insert for allowing water to flow from the upper surface of the adjustable flat insert through the drain channels, into a central opening in the insert, and into the drain assembly; e. an outermost layer of polyurethane sprayed over the section of extruded foam and the adjustable flat insert to define a waterproof membrane over these elements as a whole; f. a layer of flooring comprised of flooring tiles having edges in alignment with the edges of the insert, wherein the layer of flooring is placed on the entire floor surface including on the adjustable flat insert, so to provide the visual effect of no drainage opening in the floor of the shower; and g. flow openings in the flooring tiles defined by having no grout between the edges of some of the tiles covering the adjustable flat insert and the edges of tile surrounding the adjustable flat insert so that water on the floor surface can flow through the flow openings and into the drain channels and into the drain assembly.