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Fuktomlagringar i välisolerade ytterväggar: En undersökning för att fastställa en rimlig inbyggnadsfuktkvoti träreglar med fuktsimuleringsprogrammet Wufi 2D
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
2011 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Moisture rearrangements in exterior walls (English)
Abstract [en]

To save energy it’s popular to build houses with low energy loss. In these houses the walls are keeping a lower temperature in the external side which leads to a higher relative humidity. In addition more material, such as wood studs, are used which means that there is more moisture to dry. More moisture in combination with higher relative humidity may pose a higher risk of microbial growth. The purpose of this study was to investigate what is a reasonable moisture content in wood studs in four different well-insulated exterior walls. It has also been investigated how moisture rearrangements effect the exterior walls. The software Wufi2D, which does moisture-simulations, was used to collect data. The results have been analyzed in Wufi Bio which showed that the moisture content should be somewhere between 12.5 to 18.5%, depending on how the wall is built. The conclusions are that windbreaks vapor resistivity is essential for what is a reasonable built in moisture content in the wood studs. Depending on the materials that are used, it´s important to consider how much moisture the wall construction contains.

Place, publisher, year, edition, pages
2011. , 60 p.
, Examensarbete Byggteknik och Design, 2011; 14
Keyword [en]
cellulose fibers, moisture rearrangements, built-in moisture, mineral wool, wood studs, windbreaks, well insulated exterior walls, Wufi2D, Wufi Bio.
Keyword [sv]
cellulosafibrer, fuktomlagringar, inbyggnadsfuktkvot, mineralull, träreglar, vindskydd, välisolerade ytterväggar, Wufi2D, Wufi Bio.
National Category
Building Technologies
URN: urn:nbn:se:kth:diva-36592OAI: diva2:430921
Available from: 2011-07-13 Created: 2011-07-13 Last updated: 2011-07-13Bibliographically approved

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