Envelope Air Sealing 2013 California Energy Efficiency Building Standards - Fact Sheet

 What is envelope air sealing? Envelope air sealing is the process of limiting infiltration and exfiltration of air through the building envelope, the interface between the interior of the building and the outdoor environment. This process includes caulking, gasketing, weather- stripping, or otherwise sealing all joints, penetrations and other openings to limit air leakage. When is envelope air sealing required? Envelope air sealing is required when constructing, adding to, or altering residential and nonresidential buildings.