Moisture transport in timber-framed external wall structures in Nordic climate - laboratory tests
Vinha, J., K?kel?, P. and Lindberg, R.
2002
6th Symposium on Building Physics in the Nordic Countries, Trondheim, Norway, Jun 17
Vinha, J., K?kel?, P. and Lindberg, R., (2002), "Moisture transport in timber-framed external wall structures in Nordic climate - laboratory tests", 6th Symposium on Building Physics in the Nordic Countries, Trondheim, Norway, Jun 17.
| Abstract: |
| "The objective of this research is to establish the moisture behaviour criteria for timber framed external wall structures in the Finnish climate and to determine the building physical properties of building materials for structural engineering and computational analysis. The tests focus on finding out how different kinds of wall structures absorb moisture and how they dry. An important question is the minimum inside water vapour resistance at which the external wall structures perform well and safely from the viewpoint of diffusion. Three test method: laboratory tests, field tests and computational analysis are used in this study. This paper presents the laboratory test equipment an d test results.
The required water vapour resistance inside depends on indoor and outdoor air conditions and changes in them due to daily and seasonal variation as well as structure type and its materials (e.g. building physical properties and thickness of material layers). Naturally, the criteria which are set down for acceptable behaviour of wall structures, effect also to the requirements. Many studies have been conducted on this type of permeable structures, but often in a warmer climate or with low moisture increase of indoor air, and the types of structures and materials have also b een different. |
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