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Talks and Poster Presentations (with Proceedings-Entry):

B. Nusser, T. Bednar, M. Teibinger:
"Proposal for a modified Glaser-Method for the risk assessment of flat timber roofs";
Talk: 9th Nordic Symposium on Building Physics- NSB 2011, Tampere, Finland; 2011-05-29 - 2011-06-02; in: "Proceedings of the 9th Nordic Symposium on Building Physics NSB 2011", Tampere University of Technology, Department of Civil Engineering, Volume 1 (2011), ISBN: 978-952-15-2574-2; 181 - 188.



English abstract:
In the current ISO 13788:2002 for calculating the hygrothermal performance of building components and building elements (Glaser-Method) neither the impact of air exfiltration, the effect of solar
radiation, or shadowing are considered. Furthermore, built-in moisture and humidity dependant diffusion resistance of vapour retarders are neglected.
To quantify the air infiltration into envelopes, a statistical approach to the amount of potential leakages at the inner airtight layer of 50 residential houses is presented in this paper. For considering the different failure risks of flat timber roofs caused by different production processes and qualities of workmanship four different classes of air tightness based on the statistical approach will be defined.
Some modifications to implement the above effects into the existing Glaser-Method (ISO 13788) and their influences on the moisture behaviour of compact timber roofs are also discussed here. The
calculation results of the modified Glaser-Method will be compared to 2D HAM simulation results. It is shown that the current version of the modified Glaser-Method underestimates the roof construction
moisture change rate.

Keywords:
Airtightness classes, air exfiltration, shading, Glaser, ISO 13788, compact timber

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