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 | Standards for Application

9.13.2.3. Standards for application

(1) The method of application of all bituminous dampproofing materials shall conform to,

(a) CAN/cgsb-37.3-M, "application of Emulsified asphalts for Dampproofing or waterproofing",

(b) cgsb 37-GP-12Ma, "application of Unfilled Cutback asphalt for Dampproofing", or

(c) CAN/cgsb-37.22-M, "application of Unfilled, Cutback Tar foundation Coating for Dampproofing".

In Plain Language

Dampproofing must be applied following the standards set out in this article, ensuring correct thickness and coverage for the product to perform as intended.

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.