The Ontario Building Code | Lumber Roof Sheathing
9.23.15.5. Lumber Roof Sheathing
(1) Lumber roof sheathing shall not be more than 286 mm wide and shall be applied so that all ends are supported with end joints staggered.
In Plain Language
Lumber roof sheathing, an alternative to panel-type sheathing, must meet the requirements set out in this article.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.