What functions must an air barrier perform? It may be more than the obvious. Learn about the types, functions, performance, difficulties, and details for air barriers to be effective. Air barriers must be carefully selected to provide the correct expected performance. Carefully crafted details and specifications are required to ensure expectations are met by the installed assembly.
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Great article David. In addition to what Standards you referenced, ASHRAE 189, that was published this past January, requires a continuous air barrier in section 7.4.2.10. The Henry Company provides both fluid appied and sheet applied membranes that are permanently UV stable. We are involved with many pressure equalized rain screen projects with open gaps. As you referenced, detailing is critical and that is why it is important to specify a manufacturer that provides all the components of the assembly and ASTM E2357.