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

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

*Corresponding author for this work

Research output: Contribution to journalConference article in JournalResearchpeer-review

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The 145 year old rural case building presented in this paper has undergone a deep renovation including internal insulation of the external walls to reduce the heat loss and improve the indoor thermal comfort. The internal insulation was a PUR-based insulation with channels of calcium silicate, experiencing to some extent capillary active behaviour. Sensors were installed between the existing wall and the internal insulation to monitor the development of hygrothermal conditions. The external façade was later hydrophobized with a water repellent agent to minimize the wind driven rain load. Measurements show that it takes time to get rid of the built-in moisture due to the application of internal insulation, however the moisture content expressed in relative humidity is slowly decreasing, although still high about two years after hydrophobizing the wall. Simulations show that the order of hydrophobizing the wall and applying internal insulation is important to promote drying of the wall.
Original languageEnglish
JournalIOP Conference Series: Earth and Environmental Science
Publication statusAccepted/In press - Apr 2021
EventSBE21 Sustainable Built Heritage - Online, Bolzano, Italy
Duration: 14 Apr 202116 Apr 2021


ConferenceSBE21 Sustainable Built Heritage
Internet address

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