above eaves). This can be reduced to 1/300 if a vapor barrier is on warm side of attic insulation. Under-floor crawl space should have a net free vent area of 1 SF for each 150 SF of crawl space (or 1 ...

Crawl-space vents were designed to allow airflow under the house, in theory releasing hot and humid air to keep mold at bay ...

Many homes and additions are built over a crawl space to save time and money. Unlike traditional basements, crawl spaces are ...