1、GA-222-09 Copyright Gypsum Association 2009. All rights reserved. Printed in U.S.A. REPAIRING SCREW OR NAIL POPS (GA-222-09) The protrusion of screw or nail heads above the gypsum panel surface is caused by one or more of the following: Lumber shrinkage occurring after gypsum panel product applicati
2、on, Loose attachment of the gypsum panel product to the framing, Improperly aligned, twisted, bent, warped, or bowed framing, Incorrect fastener length, or Improper fastening Fastener pops are largely caused by lumber shrinkage due to initially high moisture content lum-ber. Overly long fastener len
3、gth contributes to the problem and fastener penetration into wood fram-ing should not exceed 7/8 in. (22 mm) for nails, 5/8 in. (16 mm) for screws. For fire-resistance rated systems use fastener lengths specified in the listing. Fastener pops that appear either before or during decoration should be
4、repaired immediately. Those that appear one or more months into the heating season are usually a result of lumber shrink-age and should not be repaired until the end of the heating season. Fastener pops are repaired by reattaching the gypsum panel product to the framing by driving a new screw or nai
5、l of the proper length into the same framing member about 1-1/2 in. (40 mm) from the popped fastener. Apply sufficient pressure to the gypsum panel to bring the back surface into firm contact with the framing member to which it is being reattached. Remove the fastener or reseat the popped fastener s
6、o that it is just below the face of the gypsum panel. Remove any loose material before treating with joint compound and redecorating. GA-222-09 Copyright Gypsum Association 2009. All rights reserved. Printed in U.S.A. GYPSUM ASSOCIATION 6525 Belcrest Road, #480 Hyattsville, MD 20782 301-277-8686 Fax
7、 202-277-8747 www.gypsum.org MEMBER COMPANY LIST 2009 AMERICAN GYPSUM COMPANY LLC CERTAINTEED GYPSUM, INC. CERTAINTEED GYPSUM CANADA, INC. CGC INC. GEORGIA-PACIFIC GYPSUM LLC LAFARGE NORTH AMERICA INC. NATIONAL GYPSUM COMPANY PABCOGYPSUM a division of PABCObuilding products, LLC TEMPLE-INLAND UNITE
8、D STATES GYPSUM COMPANY This document may be revised or withdrawn from circulation at any time. The status of the document should be verified by the user prior to following any recommendations contained herein. To verify that you have the most current edition of the docu-ment, access the Gypsum Association website at: www.gypsum.org.
