PART 5 — ENVIRONMENTAL SEPARATIONUpdated for the 2024 Ontario Building Code
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5.6.2.1.Sealing and Drainage (See Note A-5.6.2.1.)
(1) Except as provided in Sentence (2), materials, components, assemblies, joints in materials, junctions between
components and junctions between assemblies exposed to precipitation shall be
(a) sealed to prevent ingress of precipitation, or
(b) drained to direct precipitation to the exterior.
(2) Sealing or drainage are not required where it can be shown that the omission of sealing and drainage will not
adversely affect any of,
(a) the health or safety of building users,
(b) the intended use of the building, or
(c) the operation of building services.
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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.