In Plain Language

Roof felts used in built-up roofing must conform to the standards referenced in this article, ensuring consistent quality for this layered roofing system.

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.