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Wallboard joint system

a joint system and wallboard technology, applied in the field of wallboard joint system, can solve the problems of potential compromise of advantage and cracks over finished join

Inactive Publication Date: 2009-07-16
GEORGIA PACIFIC GYPSUM LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To date the newly commercialized fiberglass faced gypsum wallboard product has been finished using the generally less expensive paper joint tape since the adhesive back of the woven glass fiber tape does not adhere well to the fiberglass facer material.
Thus, it has not been considered advisable to dispense with the initial bedding layer for the joint or other defect during the finishing operation, which eliminates one of the main advantages recommending the use of the generally higher priced fiberglass drywall tape.
Otherwise, normal structural movement in the wall or ceiling assembly can result in the development of cracks over the finished joint.
When paper tape is used for finishing the joints and other openings with this fiberglass-faced product, however, that advantage is potentially compromised, as the paper at the seams, inside corners and other locations can potentially provide a suitable surface for supporting mold and mildew growth.

Method used

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Embodiment Construction

[0019]In accordance with the present invention, an improved system and method for finishing seams and other openings in a wall construction which uses a coated non-woven fiberglass mat-faced gypsum wallboard is provided.

[0020]The system and method comprises applying a layer of joint compound to the seam, inside corner or other defect in a coated, non-woven fiberglass mat-faced gypsum wallboard assembly and then affixing thereto a coated, non-woven glass fiber mat-based joint tape or drywall tape. The coated, non-woven glass fiber mat drywall tape or joint tape is applied to wet joint compound in the seam, inside corner or other defect in a coated, fiberglass-faced gypsum wallboard assembly using the non-coated side of the drywall tape.

[0021]The coating on what ultimately becomes the free surface of the coated non-woven glass fiber mat joint tape or drywall tape in the finished seam or repair region comprises a cured (e.g., dried), highly filled film-forming, e.g., latex, binder simi...

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PUM

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Abstract

The present invention relates to a drywall tape or joint tape comprising a non-woven web of fibers having a coating of a filled, film-forming polymer on one side and being non-coated on an opposite side for covering seams or for repairs generally in connection with fiber mat-faced gypsum wallboard, and more particularly pertains to a method for finishing joint seams and making other repairs in connection with a coated fiber mat-faced gypsum wallboard.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a drywall tape or joint tape for covering seams or for repairs generally in connection with fiberglass faced gypsum wallboard constructions, and more particularly pertains to a method for finishing joint seams and making other repairs in connection with a coated fiberglass faced gypsum wallboard.BACKGROUND OF THE INVENTION[0002]Recently, a gypsum wallboard product has become commercially available that has the conventional multi-ply paper facer replaced with a coated, non-woven mat of glass fibers. Aspects of this wallboard construction are described in U.S. Patent Publications 2005 / 0266225 and 2006 / 0240236, the disclosures of which are incorporated herein by reference.[0003]This new wallboard product is installed and finished in a very similar fashion to conventional paper-faced wallboard or drywall by affixing the boards to studs or joints and filling and coating the joints with a specially prepared adhesive called “join...

Claims

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Application Information

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IPC IPC(8): E04B2/02
CPCE04F13/042E04C2/043
Inventor FRANCIS, HUBERT C.
Owner GEORGIA PACIFIC GYPSUM LLC