نبذة مختصرة : Since 2010 there has been an increasing presence of surface and interstitial moisture and mould within single- and multi-residential buildings in Australia. The increasing presence of moisture and mould has coincided with the adoption of national energy efficiency regulations, which have aimed to reduce the energy needed to heat and/or cool new dwellings. Whilst the research until 2012 focused on international practices for the design and construction of modern façade systems, in 2013 several thousand non-transient moisture calculations were completed to identify typical external wall systems that may be at risk of moisture accumulation. Recognising the deficiency of this method, in 2017 the research adopted transient hygrothermal and mould growth calculation methods. Through a mix of State and Industry funded research activities transient moisture and mould risk assessments have been completed for hot and humid, warm-humid, temperate and cool temperate climates in Australia. This paper reports on the most recent research that explored simulated Mould Index calculations for the temperate and cool-temperate climates of south-eastern Australia. The research identified significant deficiencies in the regulatory framework and the need for significant changes in design and construction practices to ensure timber-framed dwellings are durable, sustainable and provide healthy interior environments.
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