Figure 1: Oriented Strand Board

OSB Frequently Asked Questions

Q How do I install OSB as wall sheathing?

A Select the correct thickness or span rating for the wall application as per the local building code requirements.

Ensure that wall framing is complete and ready to accept the sheathing. OSB wall sheathing panels may be installed either horizontally (across the supports) or vertically (parallel to the supports).

Leave 1/8" (3 mm) gaps between panels, and 1/8" (3 mm) gaps around openings for windows and doors. Fasten panels with 2" (50 mm) common (6d) or 1 3/4" (45 mm) deformed shank nails at 6" ( 150 mm) o.c. along the panel edges, and at 12" (300 mm) o.c. along the intermediate supports. Keep nails 3/8" (10 mm) away from panel edges.

Blocking or diagonal bracing is not required unless specified. (Special provisions apply for OSB sheathing used in shear walls. Please consult the manufacturer or the Structural Board Assocation).

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