Review of hygrothermal models for building envelope retrofit analys
CMHC
2003
Canada Mortgage and Housing Corporation, Technical Series 03-128
CMHC, (2003), "Review of hygrothermal models for building envelope retrofit analys", Canada Mortgage and Housing Corporation, Technical Series 03-128.
| Abstract: |
| Alex McGowan, P. Eng, Levelton Engineering Ltd
Introduction
Canada Mortgage and Housing Corporation (CMHC) supports research on the durability of building envelope assemblies. CMHC has a specific interest in assessing the impact of the addition of insulation and air/vapour barriers to existing wall assemblies in order to ensure that retrofit strategies do not adversely impact the performance of the retrofitted assemblies and that the intended improvements in system performance are achieved. CMHC is engaged in the analysis of a number of retrofit scenarios for five specific wall types used in multi-unit residential and commercial office buildings. Much of the analysis will be done with computerized hygrothermal modeling tools that will be used to characterize the change in heat, air and moisture regimes within the wall assemblies as a result of the retrofits being undertaken in different weather locations across Canada. This information will then be used to predict the likelihood of durability related problems in the retrofitted assemblies overtime. As a first step, CMHC initiated a project to review available computerized hygrothermal modeling tools that would be appropriate for assessing the performance of building envelope retrofits |
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