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Composite panel

  • US 4,073,997 A
  • Filed: 09/17/1976
  • Issued: 02/14/1978
  • Est. Priority Date: 12/06/1974
  • Status: Expired due to Term
First Claim
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1. A roof insulating system comprising a roof deck;

  • an adhesive layer on said roof deck;

    roof insulation on said layer, said roof insulation comprising a slab of expanded organic polymeric material having two major, substantially planar, substantially parallel surfaces and a peripheral edge of predetermined shape, said slab having a thickness from about one-half inch to about four inches, a thin mat of substantially randomly-disposed glass fibers on the upper major surface of said slab with the mat disposed substantially uniformly over said entire major surface, said fibers being held together by a binder, the polymeric material at the upper edge of said slab at least partially penetrating interstices among the fibers of said mat in a manner to be functionally integral therewith, and a layer of glass fibers affixed to the lower major surface of said slab, the polymeric material at the lower surface of said slab at least partially penetrating interstices among the fibers of the latter layer in a manner to be functionally integral therewith;

    a second adhesive layer on the upper surface of said mat; and

    a mat of fibers impregnated with asphalt on top of said second layer.

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