Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.
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The Ontario Building Code | Foundation Walls Below Ground

9.15.6.1. foundation Walls Below Ground

(1) Concrete block foundation walls shall be parged on the exterior face below ground level as required in Section 9.13.

In Plain Language

The below-ground portion of a foundation wall must meet the requirements set out in this article, addressing the added soil pressure and moisture exposure at this level.

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.