Abstract
The rapid evolution of traditional wood-frame construction prac tices, in response to the need for energy conservation, has led to an increase in mois ture problems in some new and retrofitted houses in certain parts of Canada. This has prompted Canada Mortgage and Housing Corporation (CMHC), the federal government's housing agency, to undertake a detailed program of research, which has involved field surveys, test hut monitoring and computer modelling. After almost a decade of such research, a better understanding of the principles of moisture, air and heat flow has been gained. This improved understanding is now being translated into practical applications for energy-efficient housing to prevent or remedy mois ture problems.
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