D. Zirkelbach, H.M. Künzel, B. Schafaczek, R. Borsch-Laaks
Bibliographic info:
4th International Symposium on Building and Ductwork Air Tightness - BUILDAIR (former European Blower Door Symposium), 1-2 October 2009, Berlin, Germany

So far, the ideal-tight typical cross section is usually considered at the evaluation of constructions with the help of hygrothermal simulation. Usually always appearing additional humidification at lightweight construction elements, caused by convection, is not considered so that impermeable constructions seem, contrary to practice, more favourable than those that are more vapour-permeable. An unsteady model is now presented, based on flat consideration about fixed quantities to swell, which quantifies moisture ingress caused via convection subject to the real constructionand basic conditions and thus allows situation-specific requirements for the air tightness of construction elements.