AC497 Under-floor Space Continuous Perimeter Vents—Approved October 2018 (PDF Download)

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AC497 10-2018
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AC497 establishes guidelines for evaluation of vents of composite material (calcium carbonate, plastic, and polyolefin resin) for the purpose of providing ventilation to the under-floor space, placed between the sill plate and the concrete or masonry foundation stem wall below, enclosing the under-floor space.

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