Towards moisture safe ventilated cold attics - Monitored conditions in a full-scale test building

Thor Hansen, Eva B. Møller, Ruut Hannele Peuhkuri*

*Corresponding author for this work

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Abstract

Existing building stock in Europe accounts for approx. 40% of the total energy consumption. Upgrading the thermal insulation of the existing buildings is an important measure to reduce heat losses through the building envelope. In some cases, increasing the thermal resistance of the construction may compromise the hygrothermal performance of the retrofitted construction. In particular, if vapour barrier is necessary for the good performance and it is practically difficult, if not even impossible, to install a well-sealed air- and vapour tight layer. To investigate the robustness of the hygrothermal performance of ventilated cold attics - with or without a vapour barrier - a monitoring campaign in a full-scale test building was set up. Also role of number of other parameters like moisture buffering capacity of the insulation material and thermal resistance was investigated. This paper presents part of this measuring campaign, which includes conditions both in the attic space and inside the insulation layer. The monitored data covers a period with two winters. The results show that it in temperate climate is practically indifferent for the hygrothermal performance of the monitored, well-ventilated attics with air-tight ceilings whether there is a vapour barrier or not and if the insulation material has moisture buffering capacity or not.
Original languageEnglish
Article number23003
JournalE3S Web of Conferences
Volume172
Number of pages7
ISSN2267-1242
DOIs
Publication statusPublished - 2020
Event12th Nordic Symposium on Building Physics - Tallin University of Technology, Tallin, Estonia
Duration: 6 Sep 20209 Sep 2020

Conference

Conference12th Nordic Symposium on Building Physics
LocationTallin University of Technology
CountryEstonia
CityTallin
Period06/09/202009/09/2020

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