Low-permeance materials in building envelopes

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DOIResolve DOI: http://doi.org/10.4224/20326842
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Series titleConstruction Technology Update; no. 41
Physical description6 p.
SubjectAir and vapour barriers; Building envelope
AbstractThe 1990 National Building Code (NBC) included limitations on the location of materials with low water vapour permeance used as air barriers that many people in the construction industry found to be overly restrictive. As a result of research at IRC, the 1995 NBC includes revised provisions that are more general (i.e. that apply to low-permeance materials used for any function) but less restrictive. This CTU reviews the general issue of the possible harmful effects of inappropriately placed low-permeance materials, gives results of the research on which the revised provisions are based and summarizes the provisions.
Publication date
PublisherInstitute for Research in Construction. National Research Council Canada
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
NoteAussi disponible en français: Matériaux de faible perméance dans les enveloppes de bâtiment
Peer reviewedNo
NRC numberNRC-IRC-10211
NPARC number20326842
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Record identifier5592f67e-c3e2-49f9-881b-ed7f4a1a0a23
Record created2012-07-18
Record modified2017-06-22
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