Volume 6, Issue 9 (October 2009)

    A New Testing Method to Evaluate the Relative Drying Performance of Different Building Envelope Systems Using Water Trays in Stud Cavities as Moisture Source

    (Received 5 September 2008; accepted 28 July 2009)

    Published Online: 2009

    CODEN: JAIOAD

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    Abstract

    Due to defects in construction, design, and/or deterioration during operation, failure occurs where rain water penetrates into stud cavities of wall systems. Some wall systems tolerate this water intrusion better than others. A new test method has been developed to evaluate the relative capacities of different wall systems to dry out the invading water. In the test setup, the walls of a two-story test hut were made up of 31 wall assemblies (each 2.44×0.76 m2) of different configurations. The hut was erected within a large climatic chamber and subjected to a steady-state climatic loading for 288 days. Within each stud cavity, a water tray on an electronic load cell was placed on the bottom plate to provide a moisture source that represents water penetrating into the stud cavity and provides a consistent moisture loading from one specimen to another. Each wall assembly was instrumented with 25 gravimetric samples and relative humidity and temperature sensors/probes. Indexes were developed to indicate the relative performance of the walls.


    Author Information:

    Fazio, Paul
    Dept. of Building, Civil, and Environmental Engineering, Building Envelope Performance Laboratory, Centre for Building Studies, Concordia Univ., Montreal, QC

    Alturkistani, Arslan
    Dept. of Architecture and Building Sciences, College of Architecture and Planning, King Saud Univ., Riyadh,

    Rao, Jiwu
    Dept. of Building, Civil, and Environmental Engineering, Building Envelope Performance Laboratory, Centre for Building Studies, Concordia Univ., Montreal, QC

    Mao, Qian
    Institute for Applied Hydraulic Engineering, Zhejiang Water Conservancy and Hydropower College, Hangzhou,


    Stock #: JAI102085

    ISSN: 1546-962X

    DOI: 10.1520/JAI102085

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    Author
    Title A New Testing Method to Evaluate the Relative Drying Performance of Different Building Envelope Systems Using Water Trays in Stud Cavities as Moisture Source
    Symposium Second Symposium on Heat-Air-Moisture Transport: Measurements and Implications in Buildings, 2009-04-20
    Committee E06