The Ontario Building Code | Wood Column Termite Protection
9.17.4.4. wood Column Termite Protection
(1) Where termites are known to exist, exterior wood columns, such as porch supports, shall be,
(a) pressure-treated with a chemical that is toxic to such termites, in accordance with Article 9.3.2.9., or
(b) supported on non-cellulosic material extending not less than 150 mm above the finished ground and shall be located not less than 50 mm from the exterior wall of an adjacent building.
9.17.5. Unit masonry Columns
In Plain Language
Wood columns need termite protection under the conditions set out in this article, addressing this pest risk in applicable regions or situations.
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.