Div. B › Part 9 › 9.23 › 9.23.15 — Roof Sheathing

9.23.15.3 — Direction of Installation

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(1) Plywood roof sheathing shall be installed with the surface grain at right angles to the roof framing.
(2) OSB roof sheathing conforming to CSA O325, “Construction Sheathing”, or to O-1 and O-2 grades as specified in CSA O437.0, “OSB and Waferboard”, shall be installed with the direction of face orientation at right angles to the roof framing members.
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