00000nam 2200000zi 4500 9.874122 CaOODSP 20240209130843 m o d f cr |n||||||||| 190601e199201##onca||||ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- NH17-248/1992E-PDF Drywall staining : final report / prepared by Institute for Research and Construction, National Research Council. [Ottawa] : [Canada Mortgage and Housing Corporation], January 1992. 1 online resource (vi, 39 pages) : illustrations text txt rdacontent computer c rdamedia online resource cr rdacarrier Title from cover. "This study was conducted for Canada Mortgage and Housing Corporation under Part IX of the National Housing Act"--Disclaimer, page i. Issued also in French under title: Décoloration des plaques de plâtre : rapport final. Digitized edition from print [produced by Canada Mortgage and Housing Corporation]. Includes bibliographical references (pages 38-39). "A problem of delayed and recurring localized discolouration (staining) of finished drywall surfaces has been investigated. Biological and physicochemical methods used in the investigation, showed that the stain was chemical in nature. Various factors involved in the staining were investigated including: UV radiation (from natural or artificial sources), humidity, temperature, airborne contaminants, life style of the occupants, as well as paint application techniques. Laboratory simulation experiments were carried out to investigate the stain causing mechanism. These experiments, in conjunction with a chemical analysis of the stain, have shown the direct cause of staining to be due to the interaction of labile constituents in the jointing compound with chemical constituents in the air."--Executive summary, page v. gccst Construction industry gccst Industrial research gccst Construction materials Institute for Research in Construction (Canada) Canada Mortgage and Housing Corporation. National Research Council Canada. Décoloration des plaques de plâtre : (CaOODSP)9.874133 PDF 2.28 MB https://publications.gc.ca/collections/collection_2019/schl-cmhc/NH17-248-1992-eng.pdf CR 6116