Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes

The duo of better insulated and more air-tight envelopes without appropriate consideration of water vapour diffusion and envelope moisture management has often demonstrated an increased potential of moisture accumulation, interstitial condensation, and mould growth within the building envelope. To i...

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Autores principales:	Toba Samuel Olaoye, Mark Dewsbury, Hartwig Künzel
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	vapour resistivity hygrothermal modelling energy efficient airtightness condensation hygrothermal boundary curve Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/acabdf5ab87c4bf7a13b5378a8c13af4
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spelling	oai:doaj.org-article:acabdf5ab87c4bf7a13b5378a8c13af42021-11-25T16:59:35ZLaboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes10.3390/buildings111105092075-5309https://doaj.org/article/acabdf5ab87c4bf7a13b5378a8c13af42021-10-01T00:00:00Zhttps://www.mdpi.com/2075-5309/11/11/509https://doaj.org/toc/2075-5309The duo of better insulated and more air-tight envelopes without appropriate consideration of water vapour diffusion and envelope moisture management has often demonstrated an increased potential of moisture accumulation, interstitial condensation, and mould growth within the building envelope. To inform a resilient, energy efficient, and healthy building design, long-term transient hygrothermal modelling are required. Since 2008, concern has been raised to the Australian building regulators regarding the need to establish the vapour diffusion properties of construction materials, in order to develop a hygrothermal regulatory framework. This paper discusses the results from laboratory testing of the vapour diffusion properties of two common reflective pliable membranes, and one smart pliable membrane. The two reflective pliable membranes are often used within the exterior walls of Australian buildings. The smart pliable membrane is a relatively new, internationally available product. The three membranes were tested as per ISO 12,572 at 23 °C and 50% RH. To establish if the vapour resistivity properties were constant, under different relative humidity conditions, the membranes were further tested at 23 °C and relative humidity values of 35%, 65%, and 80%. The results of the three pliable membranes show that the vapour resistivity properties varied in a non-linear (dynamic) manner subject to relative humidity. In conclusion, this research demonstrates that regardless of the class, each of the tested membrane types behaved differently under varying relative humidity and pressure gradients within the testing laboratory.Toba Samuel OlaoyeMark DewsburyHartwig KünzelMDPI AGarticlevapour resistivityhygrothermal modellingenergy efficientairtightnesscondensationhygrothermal boundary curveBuilding constructionTH1-9745ENBuildings, Vol 11, Iss 509, p 509 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	vapour resistivity hygrothermal modelling energy efficient airtightness condensation hygrothermal boundary curve Building construction TH1-9745
spellingShingle	vapour resistivity hygrothermal modelling energy efficient airtightness condensation hygrothermal boundary curve Building construction TH1-9745 Toba Samuel Olaoye Mark Dewsbury Hartwig Künzel Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes
description	The duo of better insulated and more air-tight envelopes without appropriate consideration of water vapour diffusion and envelope moisture management has often demonstrated an increased potential of moisture accumulation, interstitial condensation, and mould growth within the building envelope. To inform a resilient, energy efficient, and healthy building design, long-term transient hygrothermal modelling are required. Since 2008, concern has been raised to the Australian building regulators regarding the need to establish the vapour diffusion properties of construction materials, in order to develop a hygrothermal regulatory framework. This paper discusses the results from laboratory testing of the vapour diffusion properties of two common reflective pliable membranes, and one smart pliable membrane. The two reflective pliable membranes are often used within the exterior walls of Australian buildings. The smart pliable membrane is a relatively new, internationally available product. The three membranes were tested as per ISO 12,572 at 23 °C and 50% RH. To establish if the vapour resistivity properties were constant, under different relative humidity conditions, the membranes were further tested at 23 °C and relative humidity values of 35%, 65%, and 80%. The results of the three pliable membranes show that the vapour resistivity properties varied in a non-linear (dynamic) manner subject to relative humidity. In conclusion, this research demonstrates that regardless of the class, each of the tested membrane types behaved differently under varying relative humidity and pressure gradients within the testing laboratory.
format	article
author	Toba Samuel Olaoye Mark Dewsbury Hartwig Künzel
author_facet	Toba Samuel Olaoye Mark Dewsbury Hartwig Künzel
author_sort	Toba Samuel Olaoye
title	Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes
title_short	Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes
title_full	Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes
title_fullStr	Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes
title_full_unstemmed	Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes
title_sort	laboratory measurement and boundary conditions for the water vapour resistivity properties of typical australian impermeable and smart pliable membranes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/acabdf5ab87c4bf7a13b5378a8c13af4
work_keys_str_mv	AT tobasamuelolaoye laboratorymeasurementandboundaryconditionsforthewatervapourresistivitypropertiesoftypicalaustralianimpermeableandsmartpliablemembranes AT markdewsbury laboratorymeasurementandboundaryconditionsforthewatervapourresistivitypropertiesoftypicalaustralianimpermeableandsmartpliablemembranes AT hartwigkunzel laboratorymeasurementandboundaryconditionsforthewatervapourresistivitypropertiesoftypicalaustralianimpermeableandsmartpliablemembranes
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Laboratory Measurement and Boundary Conditions for the Water Vapour Resistivity Properties of Typical Australian Impermeable and Smart Pliable Membranes

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