Effects of air change rate and moisture load related to moisture index and the expected moisture performance of a wall assembly

Abstract Mould may grow in wood frame wall assemblies when subjected to excessive moisture load over prolonged periods of time. To permit estimating the risk wood-frame assemblies, one approach is use hygrothermal simulations. This process requires access relevant climate data and as well, knowledge experience regarding simulation tools. As it not be practical undertake such an analysis for each different type being considered a given location use. In this regard, index usually designing measures protection from precipitation useful indicator that reflects intensity duration loads which building envelope Hence, study described paper, consideration was determining correlation between mould growth would beneficial practitioners level achieved regions having particular value index. The indices were generated Oriented Strand Board (OSB) incorporated within vinyl-clad assembly located selected Canadian cities derived. Effects air change rate also taken into account assessing two indices. results indicate are favourable maintain humid environment, strong correlations observed indices, vice versa.