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      Advanced Cold Roof Construction in a Temperate Climate

      , 1 , 2 , 3

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

      28-29 June 2021

      cold roof, moisture, airtightness, hygrothermal, mould risk, low energy, Passivhaus

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          Cold pitched roofs constitute 80% of domestic roofs in the UK and are commonly used when constructing new dwellings. They typically have horizontal insulation at ceiling level and a ventilated volume of cold air above. As the heat loss from low energy dwellings is reduced moisture risks increase, unless accompanied by ventilation and/or airtight construction. Current research suggests a ventilation slot is required in the U.K. climate – even in airtight dwellings. Whilst theoretical models can and should inform design, they are of limited use if their real-world performance is not verified. This paper examines the hygrothermal performance of a sealed (unvented), windtight, cold roof with horizontal blown mineral wool insulation located above an airtight house located in Northern England. The roof has been monitored over the duration of 24 months. The research has assessed the viability of such roofs in the UK climate. The results are somewhat surprising, counter intuitive and defy conventional expectations.

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          Author and article information

          13 May 2021
          [1 ] LEAP: Lovingly Engineered Architecture
          [2 ] School of The Built Environment. University of Reading
          [3 ] Apex Acoustics
          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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