PART 5 — ENVIRONMENTAL SEPARATIONUpdated for the 2024 Ontario Building Code
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5.7.3.4.Where Dampproofing is Permitted
(1) Vertical building assemblies that separate interior space from the ground are permitted to be dampproofed where,
(a) such assemblies are not subjected to hydrostatic pressure,
(b) the substrate is cast-in-place concrete, and
(c) a drainage layer is installed between the building assembly and the soil.
(See Note A-5.7.3.4.(1))
(2) Joints, junctions and penetrations shall be designed and constructed to maintain the continuity of the dampproofing.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.