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Use of fibrous mat-faced gypsum board in exterior finishing systems for buildings and shaft wall assemblies

  • US 5,371,989 A
  • Filed: 02/19/1992
  • Issued: 12/13/1994
  • Est. Priority Date: 02/27/1984
  • Status: Expired due to Term
First Claim
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1. A gypsum board comprising a set gypsum-containing core sandwiched between two sheets of porous glass mat, each of said mats consisting of randomly distributed glass fibers bonded by an adhesive material, said mats adhered to said set gypsum core by a portion of said set gypsum, at least a first of said mats having an outer surface which is substantially free of set gypsum.

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