Crawlspace Access Openings
(1) An access opening of not less than 500 mm by 700 mm shall be provided to each crawl space where the crawl space serves a house or an individual dwelling unit in a house, and not less than 550 mm by 900 mm for other crawl spaces.
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(2) Access openings shall be fitted with a door or hatch, except when the crawl space is heated and the access opening into the crawl space is from the adjacent heated space.
Article 9.18.2.1 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.
