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

Thor Hansen, Eva Møller, Ruut Peuhkuri*

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Abstrakt

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.
OriginalsprogEngelsk
Titel12th Nordic Symposium on Building Physics (NSB 2020)
RedaktørerJ. Kurnitski, T. Kalamees
Antal sider7
Vol/bind172
ForlagEDP Sciences
Publikationsdato30 jun. 2020
Artikelnummer23003
DOI
StatusUdgivet - 30 jun. 2020
Begivenhed12th Nordic Symposium on Building Physics, NSB 2020 - Tallinn, Estland
Varighed: 6 sep. 20209 sep. 2020

Konference

Konference12th Nordic Symposium on Building Physics, NSB 2020
LandEstland
ByTallinn
Periode06/09/202009/09/2020
NavnE3S Web of Conferences
Vol/bind172
ISSN2555-0403

Bibliografisk note

The paper is presented in section: Moisture damage and durability.

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