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An empirical measurement of the water vapour resistivity properties of typical Australian pliable membrane

Citation

Olaoye, TS and Dewsbury, M and Kunzel, H and Nolan, G, An empirical measurement of the water vapour resistivity properties of typical Australian pliable membrane, Proceedings of the 54th International Conference of the Architectural Science Association (ANZAScA), 26-27 November 2020, Auckland, New Zealand, pp. 1-10. ISBN 9780992383572 (2020) [Refereed Conference Paper]


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Abstract

International experience has shown that the duo of better insulated and more air-tight envelopes has often demonstrated an increased potential of moisture accumulation, interstitial condensation, and mould growth within the building envelope. Recent Australian research has documented high levels of indoor relative humidity and moisture accumulation in external walls. It is accepted that the materials that comprise the external envelope play a pivotal role in managing moisture accumulation and household generated water vapour diffusion. Internationally, to inform external envelope design, long-term transient hygrothermal analysis tools are used to simulate the water vapour diffusion and moisture accumulation process. To complete the hygrothermal analysis, the water vapour resistance properties of each envelope component must be known. At this stage, the vapour resistivity properties of most Australian construction materials are unknown. In this research, the vapour resistivity properties for some selected pliable membrane materials has been tested using variable relative humidity and variable temperature conditioned room. This novel method has been developed in response to international concern that the current vapour resistivity testing method may be inadequate, due to the variable conditions that exist within new buildings. This paper reports on the results from tests completed at 23oC and relative humidity values of 35% and 50%.

Item Details

Item Type:Refereed Conference Paper
Keywords:interstitial condensation, mould growth, hygrothermal analysis, vapour resistivity, pliable membrane
Research Division:Built Environment and Design
Research Group:Architecture
Research Field:Architectural science and technology
Objective Division:Energy
Objective Group:Energy efficiency
Objective Field:Residential energy efficiency
UTAS Author:Olaoye, TS (Mr Toba Olaoye)
UTAS Author:Dewsbury, M (Dr Mark Dewsbury)
UTAS Author:Nolan, G (Professor Gregory Nolan)
ID Code:142138
Year Published:2020
Deposited By:Architecture and Design
Deposited On:2020-12-15
Last Modified:2021-04-07
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