scope:

Abstract:

Norbord treated oriented strand board (OSB) is made with strands of various species and strand classifications in accordance with the in-plant manufacturing standard approved by APA. The OSB is treated with Borogard® ZB (registered trademark of U.S. Borax; an EPA registered zinc borate preservative) for decay and insect resistance to a retention level equivalent to that specified in American Wood Protection Association (AWPA) Standard T1 and to that specified as Hazard Class H2 in the Australia - New Zealand Standard AS/NZS 1604.2:2012. The efficacy of the preservative treatment is outside the scope of this report and the APA certification program. Norbord treated OSB meets the requirements of PS 2 and is edge sealed and available in Performance Categories from 3/8 to 1-1/8