Ken Nelson (Dupont) explains that air leakage is important because it can transport heat, moisture, and contaminants through the building enclosure and can impact building energy performance, envelope durability, and occupants’ comfort. A continuous air barrier is critical for air leakage control. Air barrier performance requirements, which include air infiltration resistance, continuity, structural integrity, and durability, will be reviewed. Energy codes which regulate air barrier requirements will be highlighted along with the three compliance options: air barrier materials, assemblies, and whole building airtightness. Register here.