The Ontario Building Code | Chimney or Flue Pipe Walls
9.21.1.4. Chimney or Flue pipe walls
(1) The walls of any chimney or flue pipe shall be constructed to be smoke- and flame-tight.
9.21.2. Chimney Flues
In Plain Language
Chimney or flue pipe walls must meet the construction requirements set out in this article, ensuring they safely contain and vent combustion gases.
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.