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      The Implications of Future Wind-Driven Rain Exposure on the Hygrothermal Performance of Internally Insulated Solid Walls in London

        1 , 1 , 2 , 1

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

      28-29 June 2021

      internal wall insulation, climate change, hygrothermal simulations

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          With approximately 40% of the London building stock built before 1919, internal wall insulation (IWI) is one of the likely measures for deep retrofit to meet carbon emissions targets. However, IWI can lead to moisture accumulation and associated unintended consequences, especially in walls highly exposed to wind-driven rain (WDR). Climate change is predicted to exacerbate WDR exposure. This paper presents a comparative analysis between the hygrothermal performance of IWI under current and far future (2080) climates. Historic weather station data and UKCP18 climate projections were used to develop weather files for simulating current and future climate, respectively. Hygrothermal simulations were performed using DELPHIN. Assemblies include calcium silicate, phenolic foam, and wood fibre systems. Future climate predictions are associated with a rise of interstitial relative humidity, leading to patterns more favourable to mould growth.

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          Author and article information

          12 May 2021
          [1 ] UCL IEDE
          [2 ] UCL Institude for Sustainable Heritage
          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.


          hygrothermal simulations, climate change, internal wall insulation


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