Deep renovation of an old single-family house including application of an water repellent agent – a case story

Hansen, Ernst Jan de Place; Hansen, Tessa Kvist; Soulios, Vasilis

doi:10.1088/1755-1315/863/1/012034

Cited by 1 publication

(3 citation statements)

References 5 publications

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“…Case Studies of using HPT on real buildings or full-scale assemblies include (de Place Hansen et al, 2021;Lubelli et al, 2007;Lubelli and van Hees, 2011;Martel et al, 2021;Sauder, 1999;UCL and BRE, 2021a;van Hees, 1998b;Vereecken et al, 2020).…”

Section: Simulation Workmentioning

confidence: 99%

“…Hydrophobic treatments (HPT), sometimes referred to as colourless water repellents (to distinguish them from paints, renders and film-forming coatings, which are not explicitly considered here), have been proposed as one means to mitigate moisture risks associated with IWI (Abdul Hamid and Wallentén, 2017;de Place Hansen et al, 2021;Künzel and Keissel, 1996;Metavitsiadis et al, 2017). HPT are solutions or emulsions of the compounds which can render a surface hydrophobic.…”

Section: Introduction and Contextmentioning

confidence: 99%

“…HPT may help reduce moisture risks in masonry walls by reducing the amount of rain absorbed; they have been deployed on walls with Cavity Wall Insulation (CWI) (UCL and BRE, 2021a) , Internal Wall Insulation (IWI) (de Place Hansen et al, 2021;Martel et al, 2021;Soulios et al, 2019;Vereecken et al, 2020), as well as in the absence of insulation to e.g. arrest/impede weathering in stone monuments and to prevent graffiti.…”

Section: Introduction and Contextmentioning

confidence: 99%

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

Cambray

Marincioni

Altamirano

2022

Preprint

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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.

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