Hygrothermal simulation assessment of internal insulation systems for retrofitting a historic Danish Building

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The built environment is accountable for 1/3 of the European energy consumption. Thermal insulation is a key factor affecting the energy performance of buildings. Historic buildings typically were made with solid external walls of brick masonry or natural stone, rarely insulated afterwards. Often the buildings have worth-preserving façades making internal insulation the only feasible technique, however significantly modifying the hygrothermal performance of the façade. The research objective of this paper is to simulate the hygrothermal performance of solid masonry walls in an old Danish hospital that will be internally insulated following the Danish requirement (U-value) for external walls (change of use of buildings) and transformed into dwellings, involving different insulation systems. Heat loss and masonry moisture content level after adding internal insulation and the possible effects of hydrophobization on the moisture content is simulated. Simulations show an increased moisture content in the original wall when adding internal insulation implying an increased risk for moisture-related damage (mould growth, frost damage and interstitial condensation). The results also show that hydrophobic impregnation of the internally insulated facades may be vital in avoiding moisture problems and securing a moisture-safe energy renovation of buildings like the one studied.
Original languageEnglish
Title of host publication4th Central European Symposium on Building Physics (CESBP 2019) : Prague, Czech Republic, September 2-5, 2019
EditorsR. Černý, J. Kočí , V. Kočí
Number of pages6
PublisherEDP Sciences
Publication date6 Sep 2019
Article number02049
Publication statusPublished - 6 Sep 2019
Event4th Central European Symposium on Building Physics 2019 - Czech Technical University in Prague, Prague, Czech Republic
Duration: 2 Sep 20195 Sep 2019


Conference4th Central European Symposium on Building Physics 2019
LocationCzech Technical University in Prague
Country/TerritoryCzech Republic
Internet address
SeriesMATEC Web of Conferences


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