Influence of material properties on the moisture response of an ideal stucco wall : results from hygrothermal simulation

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Conference6th Symposium on Building Physics in the Nordic Countries: 17 June 2002, Trondheim, Norway
Pages611618; # of pages: 8
Subjectbuilding materials, moisture response, hygrothermal properties, stucco wall; Hygrothermal properties; Heat performance; Moisture performance; Air and vapour barriers
AbstractIn a composite wall, each constituent component plays a specific role in effective moisture management. The moisture movement to and from the wall assembly, subjected to climatic forces, such as relative humidity (RH), temperature, rainfall and solar radiation, is influenced by the basic hygrothermal properties of the component materials. Studies conducted at the National Research Council (NRC) Canada, over the years, show that the hygrothermal properties of materials vary over a wide range. Quite naturally, such variation may influence the overall moisture response of the wall. This paper investigates the extent to which each component of the wall can influence the overall drying and wetting characteristics of an ideal (i.e., without any deficiency) wood-frame stucco wall when it is exposed to weather conditions typical of coastal Western Canada. The component materials selected include stucco, sheathing board, a sheathing membrane and a vapour barrier. Hygrothermal material properties compiled in the laboratory at the NRC and the hygrothermal modelling tool, hygIRC, developed by the NRC, are used for this purpose. The findings of this study indicate that, with further work and analysis, practical guidance could be developed to assist designers and engineers to identify the critical components and properties of the stucco wall assembly to achieve a desirable moisture management strategy for the building envelope.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number45228
NPARC number20378579
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Record identifier698d6870-a250-49e3-9588-b4cd15665996
Record created2012-07-24
Record modified2016-05-09
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