IRC2018R702.2.1
Gypsum plaster.
Original sourcePlain-English Explanation
Section R702.2.1 addresses gypsum plaster.. This ensures exterior wall coverings are properly installed to protect your home from moisture, wind, and weather damage.
For the Contractor
Per IRC R702.2.1 (Gypsum plaster.): install WRB per manufacturer specs, verify flashing at all transitions, and document installation before covering.