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Composite roofing members having improved dimensional stability and related methods

  • US 6,044,604 A
  • Filed: 08/10/1998
  • Issued: 04/04/2000
  • Est. Priority Date: 09/23/1996
  • Status: Expired due to Term
First Claim
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1. A composite recovery board comprising:

  • a foam core selected from the group consisting of polyisocyanurate, polyurethane materials, and mixtures thereof;

    a facer applied to one major surface of said foam core and comprising a sheet selected from the group consisting of polymer materials selected from the group consisting of polypropylene, polyamides, polymer latexes, and mixtures thereof, reinforced polymer materials, cellulosic materials, paper, aluminum foil and trilaminates thereof, wherein said latter polymer materials and said cellulosic materials are reinforced with a material selected from the group consisting of glass strands, glass fibers, and mixtures thereof; and

    a gypsum board, applied to the opposite major surface of said foam core.

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