Patent ID: 6647565
Filing Date: 2003-11-18
Classification: A47K,E04F

Abstract:
A method of constructing a drainage surface for a drainage area having a defined drainage point, the method including:(a) defining the drainage area; (b) defining the drainage point within the drainage area; (c) taking a plurality of uniform support members, each support member comprising a planar unit and including one substantially flat surface and an opposite drainage surface forming a slope from an outer region at which the unit is thicker to an inner corner at which the unit is thinner, the plurality of support members capable of forming a substantially continuous drainage surface when the inner corners adjoin the drainage point, and wherein the support members are formed from rigid polyurethane foam; (d) if required, cutting or shaping outer regions of the support members to fit the defined drainage area; (e) positioning the support members in the defined drainage area to form a substantially continuous drainage surface; and (f) forming a seal over the support members.