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      An overview of hydrophobic treatments and their application with Internal Wall Insulation

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            Revision notes

            I would like to thank the two peer reviewers as well as Eric Rirch and Bill Bordas for their feedback. Their comments have been invaluable in revising this paper.

            Abstract

            Hydrophobic (or water-repellent) treatments have been proposed to mitigate moisture risks associated with Internal Wall Insulation when applied to solid masonry walls. This can reduce risks associated with moisture accumulation within the structure such as mould growth or the deterioration of joist ends and other embedded timber. Where treatments perform well there is a net reduction of moisture content and risk. However, such treatments slow down drying processes, and therefore may result in a net increase in moisture if the treatment is bypassed by e.g. cracks. Some treatments have may lead to damage to external masonry surfaces in some situations. Freeze-thaw and salt crystallisation are the two main causes Hygrothermal simulations may give some indication of risks but techniques to assess the risk of surface damage are either simplistic, impractical outside of the research environment, or both. This paper reviews the state of the art of assessing and predicting the risk of surface damage associated with surface treatments.

            Content

            Author and article information

            Journal
            UCL Open: Environment Preprint
            UCL Press
            24 November 2022
            Affiliations
            [1 ] Institute for Environmental Design and Engineering, University College London
            Author notes
            Author information
            https://orcid.org/0000-0001-9032-0507
            https://orcid.org/0000-0003-3718-9743
            https://orcid.org/0000-0001-9398-3066
            Article
            10.14324/111.444/000149.v2
            6ebc260b-9a1b-4846-98ea-016d0697745d

            This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY) 4.0 https://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

            History
            : 6 May 2022
            Funding
            EPSRC, SPAB, Safeguard Europe Ltd EP/S021671/1
            Categories

            Data sharing not applicable to this article as no datasets were generated or analysed during the current study.
            Materials technology,Engineering,Architecture
            Water repellent,Solid Wall Insulation,Internal Wall Insulation,Hygrothermal,Energy and climate,Sustainability in architecture and the built environment,Hydrophobic

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