Patent ID: 8104245
Filing Date: 2012-01-31
Classification: B29C,B29K,B29L,B32B,C09J,E04D,Y10T

Abstract:
1. A method for waterproofing a structural surface, the method comprising the steps of: providing a waterproof composite membrane for adhesive application to an outer surface of the structural surface to substantially cover the surface, the composite membrane comprising; an outer surface layer of a selected one of thermoplastic and elastomeric waterproof material of about 60 mils thickness or greater; a backing layer of homogeneous non-absorptive closed-cell foam material of about 60 mils thickness or greater and constant cross-section bonded in continuous contact with an inner surface of said layer of thermoplastic or elastomeric material; the layer of foam material and the outer surface layer being bound to each other surface-to-surface so as to be devoid of a medium for lateral migration of water therethrough; a pressure sensitive adhesive contiguous with and bound to a side of said foam material remote from the outer surface layer; the layer of foam material being adapted to conform around irregularities in the structural surface; a release liner removably mounted on the pressure sensitive adhesive remote from the layer of foam material; and a 2-4 inch selvedge structure for overlapping and bonding of said waterproof material to an adjoining membrane; removing the release liner to expose the pressure sensitive adhesive; pressing the pressure sensitive adhesive against the structural surface; and overlapping the selvedge structure unto an adjoining membrane to conform the layer of foam material to the structural surface and bond the waterproof membrane to the structural surface; wherein the composite membrane provides waterproofing and moisture protection.