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NBC 9.25.1.2.: The on-going development of building code requirements to address low air and vapour permeance materials

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Conference10th Canadian Conference on Building Science and Technology "Building Science and the Integrated Design Process", May 12, 2005, Ottawa, Ontario, Canada
SubjectCodes & guides; air leakage; vapour diffusion; vapour permeance; hygrothermal modeling; mild climate indicator; relative humidity; building code
Abstract
Part 9 of the National Building Code (NBC) provides, in Article 9.25.1.2., requirements that identify where low air and vapour permeance materials can be located in building envelope assemblies depending on the position of the thermal insulation in the assembly and the climate at the building site. The provisions to be included in the 2005 NBC have evolved over many code development cycles as issues have become more clearly identified. This paper briefly outlines the development of the requirements up to those included in the 1995 NBC and discusses in more detail the basis for the changes to be included in the 2005 Code. Various questions still remain for investigation in the future; some of these are identified.
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  • 10th Canadian Conference on Building Science and Technology "Building Science and the Integrated Design Process" [Proceedings] (1 May 2005): 48–58.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 47656
NRC-IRC-17827
NPARC number20377496
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Record identifier1b3c3eda-1374-42bc-b20c-d031912b7d41
Record created2012-07-24
Record modified2020-04-07
Date modified: