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Should Weyerhaeuser OSB sheathing be installed with the edges tight together?

No, all OSB sheathing should be be spaced approximately 1/8” during installation.

The tongue and groove joints of Weyerhaeuser floor panels (including Edge™ and Edge Gold™) are designed to simply be slid together without using significant force. The tongue of the panels is slightly longer than the depth of the groove to allow for a slight gap along the panel edges.

All floor, roof and wall panel edges that do not have a tongue and groove should be spaced approximately 1/8” during installation—this is noted on the panel grade stamp with the words “sized for spacing”.  The 1/8" gap allows for the expansion that occurs when the panels are exposed to moisture.  See our Floor, Roof and Wall Panel Installation Technical Resource Sheet for more information. Video-Installing OSB correctly

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