What must a system achieve to conform to air barrier requirements?

To conform to air barrier requirements, a system must meet specified air leakage rates. This is crucial because air barrier systems are designed to control air movement between the interior and exterior of a building, thereby enhancing energy efficiency and indoor air quality. The specified air leakage rates are generally established by industry standards and regulations, such as the ASTM E283 or the ASHRAE 90.1 standards, which mandate performance criteria for energy conservation.

Meeting these rates is essential for minimizing unwanted air infiltration and exfiltration, which can lead to energy losses, discomfort, and potential moisture problems within the building envelope. A system designed to meet these leakage rates ensures that the building will not only be energy efficient but also comfortable and durable over time.

While aesthetic criteria, exceeding environmental standards, and using local materials may be important considerations in the overall building design and construction process, they do not directly impact the primary function of the air barrier system, which is to limit air leakage to specified levels.