Use of fibrous mat-faced gypsum board in exterior finishing systems for buildings and shaft wall assemblies
First Claim
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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Accused Products
Abstract
An exterior finishing system for a building, including particularly an exterior insulation system, which includes a fibrous mat-faced gypsum board, preferably a board in which the set gypsum core thereof is water resistant, and preferably one in which the set gypsum core is sandwiched between two sheets of porous glass mat, with the outer surface of at least one of said mats being substantially free of set gypsum, and means for preparing the board, including control of the viscosity of the aqueous gypsum slurry from which the set gypsum core of the board is formed. Also, the use of fibrous mat-faced gypsum board as the shaft liner panel in a shaft wall assembly.
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Citations
25 Claims
- 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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16. A gypsum board comprising a set gypsum-containing core sandwiched between two sheets of porous glass mat, each of said mats consisting of randomly oriented glass fibers bonded by an adhesive, said mats having an outer surface and an inner surface and having substantially uniform density between said outer and inner surfaces, said outer surface of a first of said mats being substantially free of set gypsum and said inner surface of each of said mats adhered to said gypsum core by a portion of said set gypsum.
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17. A gypsum board comprising a set gypsum core having at least one porous, non-woven glass mat thereon, said mat consisting of randomly distributed glass fibers bonded by an adhesive material, said mat adhered to said gypsum core by mechanical interlocking means formed from a portion of said randomly distributed glass fibers bonded to said set gypsum, whereby an outer surface of said mat is substantially free of set gypsum.
- 18. A gypsum board comprising a set gypsum core having a sheet of substantially uniformly porous non-woven glass mat consisting of randomly oriented glass fibers bonded by an adhesive, said mat adhered to said gypsum core by a portion of said set gypsum during the fabrication of said core, wherein a gypsum slurry, having a viscosity sufficient to prevent full saturation by said mat, is disposed onto said mat, said mat having an outer surface which is substantially free of set gypsum.
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22. A gypsum board comprising a set gypsum core having disposed thereon a porous glass mat adhered substantially continuously to said core by a portion of said set gypsum, said mat consisting of a substantially uniform density of randomly distributed, chopped glass fibers bonded by an adhesive material, said mat having an outer facing surface which is substantially free of set gypsum.
- 23. A gypsum board comprising a set gypsum core having disposed thereon a substantially uniformly porous glass mat consisting of randomly distributed glass fibers bonded by an adhesive material, an inner surface of said mat adhered to said gypsum core by said set gypsum during the forming of said board whereby the viscosity of a gypsum slurry precursor of said set gypsum is controlled to penetrate only part-way into the thickness of said mat whereby an outer surface of said mat becomes substantially free of set gypsum.
Specification