Roof Sheathing Material Standards

(1)  Wood-based panels used for roof sheathing shall conform to the requirements of,

    (a)   CSA O121, “Douglas Fir Plywood”,

    (b)   CSA O151, “Canadian Softwood Plywood”,

    (c)   CSA O153, “Poplar Plywood”,

    (d)   CSA O325, “Construction Sheathing”, or

    (e)   CSA O437.0, “OSB and Waferboard”.

Article 9.23.15.2. Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.