IRC2021R702.3.7

Water-resistant gypsum backing board.

Original source

Plain-English Explanation

Section R702.3.7 addresses water-resistant gypsum backing board.. This ensures exterior wall coverings are properly installed to protect your home from moisture, wind, and weather damage.

For the Contractor

Per IRC R702.3.7 (Water-resistant gypsum backing board.): install WRB per manufacturer specs, verify flashing at all transitions, and document installation before covering.