A Test Method to Determine Air Flow Resistance of Exterior Membranes and Sheathings

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TypeArticle
Journal titleBuilding Research Note
ISSN0701-5232
Volume227
Pages14
Subjectair flow; air barriers; vapour barriers; Air and vapour barriers; Air flow/Wind pressure
AbstractThis note describes a test method for determination of air flow resistance of exterior membranes and sheathings. The test specimen is placed between two chambers with different air pressures and the volumetric air flow rate through it at a steady state is determined. The relevant experimental quantities can presently be measured with precision better than 0.5% and with an accuracy of 2 to 3%, using commercial instruments. However, the instrumental precision does not mean much, due to the uncertainty introduced by material variability normally occurring in commerical products. This aspect of the test method is studied and a practical test procedure is suggested.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierBRN-227
NRC number3531
NPARC number20375701
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Record identifiere9aafda0-ca3d-4f47-adaf-5c7e2a19abb3
Record created2012-07-23
Record modified2016-05-09
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