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Title
Plywood or OSB?
Date
4/2021
Author(s)
Mark Graham
Page(s)
24-27
Source
Professional Roofing / National Roofing Contractors Assn
Keyword(s)
plywood; OSB; panel; roof; decks
Abstract
NRCA’s technical services staff continues to hear from roofing contractors experiencing moisture-related dimensional stability problems with plywood and oriented strand board structural panel sheathing used with steep-slope roof systems. Following is a brief discussion of moisture mechanics, linear expansion and thickness swell testing, and NRCA’s recommendations for plywood and OSB structural panel sheathing roof decks.
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