The Ontario Building Code | Brick or Steel Liners
9.22.2.1. brick or Steel liners
(1) Except where a fireplace is equipped with a steel liner, every fireplace shall have a firebrick liner.
In Plain Language
Brick or steel liners for a fireplace's firebox 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.