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      Hygrothermal performance of bio-based insulation material in wood-frame walls exposed to unintended moisture sources

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

      28-29 June 2021

      bio-based insulation, wood frame construction, moisture infiltration, thermal performance, durability, HAM-simulation

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          The attention for energy performant buildings with a low environmental impact has been growing over the years and as a result, the use of biobased insulation materials as well as wood frame constructions has become more and more prevalent in Belgium and Europe. This research assesses the hygrothermal behavior of bio-based insulation materials, used in wood frame walls. The study concentrates on their durability and thermal performance, when exposed to unintended moisture sources. Two different leakages are looked at: one originating from imperfections in the weathering sealant at the exterior, and a second is introduced due to insufficient air tightness at the interior, causing infiltration of humid indoor air into the wall system and the occurrence of interstitial condensation. Primarily results show the dominant impact of the ventilation rate in the cavity between the masonry outer leaf and the wood frame wall, on the durability and the thermal performance of the structure. Also, there is higher negative impact by exterior leakages on highly absorptive bio-based insulation material compared to the traditional mineral wool setup.

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          Author and article information

          13 May 2021
          [1 ] Building Physics Group, Faculty of Engineering and Architecture, Ghent University
          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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