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Talks and Poster Presentations (with Proceedings-Entry):

P. Wegerer, T. Bednar:
"Method for measuring the air-tightness of facing formworks";
Talk: 10th Nordic Symposium on Building Physics, Lund, Sweden; 2014-06-15 - 2014-06-19; in: "NSB 2014,10th Nordic Symposium on Building Physics", Grafisk gruppen AB, (2014), ISBN: 978-91-88722-53-9; Paper ID 13, 8 pages.



English abstract:
Air-tightness of constructions is essential when evaluating a building´s energy efficiency and durability. Even in connection with refurbishment air-tightness is becoming increasingly important.
Especially when using facing formworks with vapour barriers as interior insulation to thermally renovate an existing building, air-tightness is an essential parameter. It has a significant influence on
the proper functioning of the construction because convective moisture entry can lead to considerable damage.
In this paper an in-situ measuring carried out on a real object is being presented, which allows to assess and to proof the air-tightness of facing formworks. This method was developed on a testing
wall in the laboratory of the Research Centre for Building Physics and Sound Protection of Vienna University of Technology.
The measurement starts after the completion of the construction by using a tracer-gas (CO2) and by adjusting excess pressure in the testing room. At the same time the increase of CO2 in the facing
formwork is recorded. Measurements are carried out with at least two different pressure ranges. From the results gained, the air flow volume coefficient C and the leakage exponent n are calculated in
accordance to EN 12114.

Keywords:
air-tightness, durability, facing formwork, in-situ measurement, tracer-gas

Created from the Publication Database of the Vienna University of Technology.