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An ASHRAE Research Project (RP-1018) that has been concluded at the Institute for Research in Construction, the National Research Council of Canada, has resulted in a unique database on many hygrothermal properties of many common building and insulation materials that are currently used in North America. The properties that are determined include thermal(More)
Review of the state-of-the-art on fungal damage of wood materials showed that a combination of period of cumulative time when moisture and thermal regimes are above specified minimum is needed for fungal activities to cause biological decay in wood. The long-term performance of a typical wall assembly was evaluated using an existing computer model of heat,(More)
  • Maref, W. Lacasse, +5 authors Michael C. Swinton
  • 2002
Recent research in the field of assessment of hygrothermal response has focused on either laboratory experimentation or modelling, but less work has been reported in which both aspects are combined. Indeed, it is generally acknowledged that assessing the hygrothermal performance of building envelope systems is both expensive and time consuming. Such type of(More)
Using numerical modelling to simulate and predict the hygrothermal (i.e., combined thermal and moisture) performance of building envelopes is very recent. Key questions include: how to model accurately coupled heat-air and capillary moisture transports in building envelope components; a satisfactory definition of a set of representative environmental(More)
At the Institute for Research in Construction, N R C Canada, a consortium project called MEWS (Moisture Management for Exterior Wall Systems) has resulted in an integrated methodology to assess the long-term performance of exterior wall systems with regard to moisture management. The methodology includes the integration of information from a review of field(More)
A survey of new home warranty programs across Canada showed that the combined action of water and soils on basements was responsible for most major basement failures in new homes in 1994 and 1995. 1 Frost action on basement walls was cited as a contributing factor in 40% of the failures; swelling clays (resulting from strong fluctuations of wetting and(More)
This paper compares the physical and economic (life cycle) performance of insulation materials placed on the exterior, above and below-grade portions of residential basements, in lieu of non-insulating drainage membranes and drainage layers, combined with internal insulation. The findings are premised on research, field studies and analysis associated with(More)
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