Which test method determines air leakage by permeance through air barrier materials?

The test method that determines air leakage by permeance through air barrier materials is ASTM E2178. This standard specifically addresses the measurement of air permeability of air barrier materials when subjected to a controlled pressure differential. It is crucial for assessing the effectiveness of air barrier systems in minimizing air leakage in building envelopes, contributing to energy efficiency and indoor air quality.

ASTM E2178 is focused on evaluating the air leakage characteristics of the materials themselves, rather than complete systems or assembly testing, making it unique in its application. It captures how much air can pass through the material, thus allowing professionals to determine if the barrier meets specified performance criteria for building applications.

The other test methods listed serve different purposes. ASTM E283 is focused on measuring air leakage of building facades, while ASTM E2357 evaluates the air leakage of entire wall systems. ASTM E1105 tests for water penetration. Each of these methods plays an important role in ensuring the overall performance of building materials but does not specifically measure the permeance of air barrier materials like ASTM E2178 does.