Slip resistant roof underlayment

  • US 8,765,251 B2
  • Filed: 07/21/2006
  • Issued: 07/01/2014
  • Est. Priority Date: 07/21/2006
  • Status: Active Grant
First Claim
Patent Images

1. A roofing underlayment, comprising:

  • a scrim formed from a woven polypropylene fabric;

    a top layer made from a non-woven spun-bond polypropylene fabric; and

    a polypropylene coating consisting of polypropylene, the polypropylene coating applied in liquid form to bond the scrim to the top layer and to saturate the woven fabric of the scrim to form a waterproof bottom structural layer,wherein the top layer is pressed into the polypropylene coating of the bottom structural layer to form a micro-textured surface.

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