Control of moisture safety design by comparison between calculations and measurements in passive house walls made of wood
Författare
Redaktör
- Vasco Peixoto de Freitas
- Helena Corvacho
- Michael Lacasse
Summary, in English
The aim of this study is to investigate the result of the moisture design process and the way changes in the design influence the moisture safety with real climate conditions. The study also investigates if WUFI 5.0 is a reliable tool to use in the construction design process. This was investigated by comparisons between measured and calculated relative humidity and temperature in different positions in an exterior wooden wall from April 2009 to October 2010.
In the original design the outer wooden studs have no protecting layer from the ventilated air gap behind the façade. Results from calculations with WUFI 5.0 shows that it is sufficient with a thin protecting thermal insulation on the outside of outer studs to considerably improve the moisture conditions in the outer parts ot the wall. If we never want the relative humidity to be above the critical level, at least 87 mm of insulation have to be applied on the outside of the wooden studs.
Comparisons between measurements and calculations show that WUFI 5.0 can be a reliable tool in moisture design of highly insulated wood framed walls. To get safe results it is important to use reliable climate and correct assumption about the air flow in the air gap behind the façade material.
Avdelning/ar
Publiceringsår
2011
Språk
Engelska
Sidor
25-32
Publikation/Tidskrift/Serie
Proceedings fo the 12th International Conference on Durability of Buildings Materials and Components - XII DBMC
Fulltext
Dokumenttyp
Konferensbidrag
Förlag
FEUP edições
Ämne
- Building Technologies
Nyckelord
- moisture
- measurements
- WUFI
- comparisons
- mould
Conference name
XII DBMC - XII International Conference on Durability of Building Materials and Components
Conference date
2011-04-12
Conference place
Porto, Portugal
Status
Published
ISBN/ISSN/Övrigt
- ISBN: 978-972-752-132-6