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A bio-hygrothermal mould growth analysis of typical Australian residential wall systems

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Nath, S, Dewsbury, M ORCID: 0000-0002-3607-3637, Watson, P ORCID: 0000-0003-1569-0780, Lovell, H ORCID: 0000-0003-1164-0356 and Kunzel, H 2020 , 'A bio-hygrothermal mould growth analysis of typical Australian residential wall systems', paper presented at the 54th International Conference of the Architectural Science Association (ANZAScA), 26-27 November 2020, Auckland, New Zealand.

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Abstract

Since 2014, Australian scholars and design and construction professionals have raised concerns about the increased presence of mould and condensation within new stand-alone and multi-residential buildings. Several studies have identified significant material decay and mould growth within external wall systems due to long-term moisture accumulation. This paper focusses on moisture and mould growth in buildings by providing an in-depth analysis of the most common external wall system for Australian residential buildings (cavity brick veneer). This wall's moisture accumulation over a ten-year period was simulated using multi-year transient hygrothermal software. Transient hygrothermal simulation is novel within the Australian research and regulatory context. Mould growth was simulated and analysed using a post-processing mould growth software. To assist in informing regulatory development, simulations were completed for three temperate Australian climate zones. The modelled wall system applied typical and regulation-compliant building material configurations for pre-2003, 2004, 2007 and 2010. The results of the modelled wall system will be used to inform national building regulations in Australia. A key component of this paper includes the evaluation of internationally accepted methods for mould growth simulation.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Nath, S and Dewsbury, M and Watson, P and Lovell, H and Kunzel, H
Keywords: hygrothermal analysis, mould growth model, mould, condensation, health
Journal or Publication Title: Proceedings of the 54th International Conference of the Architectural Science Association (ANZAScA)
Publisher: ANZAScA
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