In Plain Language

Sheathing membrane material must conform to the standard referenced in this article, ensuring it reliably blocks water while still allowing some vapour to pass through.

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.