1. Scope
1.1 This test method determines the air permeance of building materials applied onto a substrate at various pressure differentials with the intent of determining an assigned air permeance rate of the material at the reference pressure difference (DP) of 75 Pa. 1.2 This test method is intended to assess air barrier materials applied onto a substrate using a 1- by 1-m specimen size. 1.3 The values stated in SI units are to be regarded as the standard. No other units of measurements are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Building materials used as air barriers in the construction industry may be adversly affected by the standard substrates they are applied onto in construction. Two examples are the porosity and surface roughness of CMU block and the joints between panels of exterior gypsum sheathing. Currently, there is not an ASTM standard to evaluate the performance of a material used as an air barrier when applied onto a substrate. This proposed standard would fill that need. Architects, manufacturers, engineers, and building owners could use this standard to evaluate the performance of a material used as an air barrier in the manner that it will be used in the actual building.
Keywords
air permeance; air leakage; air barrier
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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