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      Water Entry Response of Wall Assemblies to Dynamic Driving Rain Wind Pressure

      1 , 2 , 3

      1st International Conference on Moisture in Buildings 2021 (ICMB21)

      28-29 June 2021

      wind-driven rain, driving-rain wind pressure, watertightness test, wall assembly

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          The pressure difference across a wall assembly arising from the Driving-Rain Wind Pressure (DRWP) produces a driving force that induces water ingress into wall assemblies given the presence of deficiencies on the exterior surface of the wall, and the downward migration of rain water over the wall surface. The extent of water penetration, which has a detrimental effect on the long-term performance of wall assemblies, is affected by the magnitude of the DRWP acting across the wall. In this study, a wall test specimen consists of 3 layers of polycarbonate sheathing has been tested under simulated Wind-Driven Rain (WDR) conditions. Deficiencies of different sizes and configurations were purposely built to the test specimen to investigate the extent of water entry given different DRWPs. To permit investigating the response of water entry under different DRWP conditions, a test protocol having a low cyclic rate was developed such that the water entry rates through the wall deficiencies could be obtained at different magnitudes of DRWP and as well, a variety of cyclic frequencies and amplitudes.

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          Author and article information

          14 May 2021
          [1 ] National Research Council Canada, Construction Research Centre & University of Ottawa
          [2 ] National Research Council Canada, Construction Research Centre
          [3 ] University of Ottawa
          The Author(s)

          Published under Creative Commons Attribution 4.0 International ( CC BY 4.0). Users are allowed to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material for any purpose, even commercially), as long as the authors and the publisher are explicitly identified and properly acknowledged as the original source.

          1st International Conference on Moisture in Buildings 2021
          28-29 June 2021
          Product Information: ScienceOpen

          The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.



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