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Waterproofing of openings.

Municipal Code of Chicago § 18-29-305.7
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18-29-305.7 Waterproofing of openings. Joints at the roof around vent pipes shall be made water tight by the use of lead, copper, galvanized steel, or other approved flashing material compatible with the pipe material and roof system. Exterior wall openings shall be made water tight.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2690806Fetched: 10/24/2026

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