Patent ID: 8230535

Claim:
A shower base assembly comprising: a drain apparatus with upper and lower clamping members; a honeycomb structure with a synthetic material bonded to its lower surface and having a contoured upper surface defining a drain opening; a formed thermoplastic waterproof membrane supported on the honeycomb surface and having a shape matching the contoured upper surface, the waterproof membrane having an exposed surface constructed to allow tile and stone to be directly bonded to the exposed surface, the waterproof membrane including a sloped main portion and a cascading portion forming a recess in the main portion that causes water to flow to the drain opening; a polymeric molded structural ring matingly engaging and supporting the cascading portion; and the honeycomb structure including a matching sloped portion that combines with the polymeric molded structural ring to structurally support the sloped main portion with the upper and lower clamping members clamped onto marginal material of the waterproof membrane around the drain opening.