University Of Tasmania

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Establishing an environmentally controlled room to quantify water vapour resistivity properties of construction materials

conference contribution
posted on 2023-05-23, 14:22 authored by Toba OlaoyeToba Olaoye, Mark DewsburyMark Dewsbury
In Australia, the National Construction Code recently included the first performance requirements relating to condensation risk mitigation in Australian Buildings. Furthermore, it’s expected that further enhancements to these regulations will occur in 2022, 2025 and 2028. Hence, hygrothermal performance assessment, which is the method by which water vapour pressure is simulated becomes an important part of the statutory process. To undertake a hygrothermal simulation relies upon building materials database, which includes water vapour resistivity, conductivity and water absorptivity properties. At this stage, whilst many materials used in Australian construction may have published values for conductivity and absorptivity, very few products have published values for water vapour resistivity. Additionally, manufacturers of building materials used in the external envelope of buildings will be seeking guidance about the water vapour resistivity properties of their products. This paper discusses the research which has been completed to establish Australia’s first laboratory to test the water vapour resistivity of building materials. The methods proposed include the use of a conditioned test room and an environmental chamber. This paper focuses on the establishment of an environmentally controlled test room for quantifying materials’ water vapour resistivity through gravimetric method. The establishment and operation of the environmental chamber will be reported later.


Publication title

Proceedings of the 53rd International Conference of the Architectural Science Association


A Agrawal




School of Architecture and Design


Australian and New Zealand Architectural Science Association (ANZAScA)

Place of publication


Event title

53rd International Conference of the Architectural Science Association

Event Venue

Roorkee, India

Date of Event (Start Date)


Date of Event (End Date)


Rights statement

Copyright 2019 Architectural Science Association (ANZAScA)

Repository Status

  • Restricted

Socio-economic Objectives

Residential building management and services; Commercial construction design