CPC E04B 1/665 (2013.01) [B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 5/18 (2013.01); B32B 5/245 (2013.01); B32B 27/065 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 27/40 (2013.01); C09J 7/29 (2018.01); E02D 31/02 (2013.01); E04D 5/10 (2013.01); E04D 5/148 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2266/025 (2013.01); B32B 2266/08 (2013.01); B32B 2307/7265 (2013.01); B32B 2419/06 (2013.01); C09J 2301/122 (2020.08); C09J 2301/162 (2020.08); C09J 2301/302 (2020.08); C09J 2400/243 (2013.01); C09J 2400/263 (2013.01); C09J 2423/006 (2013.01); C09J 2475/006 (2013.01)] | 20 Claims |
1. A method for providing a waterproofing barrier upon a sloped roofing surface, comprising:
providing a rolled waterproofing laminate membrane with a removable release sheet, the membrane when unrolled and with release sheet removed having a total composite thickness in the range of 12 mils to 115 mils;
unrolling the waterproofing laminate membrane and positioning the membrane onto the building surface, and removing the release sheet during or after unrolling or positioning of the waterproofing laminate membrane on the building surface, the laminate membrane comprising:
a) a continuous outer layer comprising polyolefin or thermoplastic polyurethane and having a total average thickness in the range of 2 mils to 20 mils;
b) a pressure sensitive adhesive layer having total thickness in the range of 5 mils to 40 mils; and
c) a closed-cell foam layer having a total thickness in the range of 5 mils to 55 mils and being located intermediate between and attached to each of the outer continuous layer and the pressure sensitive adhesive layer, wherein the closed cell foam layer is made from a polymer which has a flexural modulus of less than 400,000 psi as measured in accordance with ASTM D 790; and
d) a removable release sheet for protecting the pressure sensitive adhesive layer on a face opposite the face to which it is attached to the closed-cell foam layer, the removable release sheet being removed from the laminate membrane during or after it is unrolled or positioned upon the building surface.
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