The Ontario Building Code | Installation of Chimney Liners
9.21.3.7. installation of Chimney liners
(1) Chimney liners shall be installed when the surrounding masonry or concrete is placed.
In Plain Language
Chimney liners must be installed as set out in this article, covering placement and support within the surrounding chimney structure.
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.