Digest 369 Interstitial condensation and fabric degradation
Publication Year
1992
Document Status
Withdrawn
Abstract
Condensation within the structural elements is called interstitial condensation. It has less immediate impact on the occupants than surface condensation and resultant mould growth but in the longer term can cause much more serious problems, possibly affecting the structural integrity of the building. Most constructions are permeable and some of the water vapour produced within the building by the normal activities of the occupants will diffuse into the external envelope. Condensation may then occur within the structure, causing decay in vulnerable materials or degrading thermal performance. Even in the absence of condensation, high humidities will raise the moisture content of timber and other hygroscopic materials and so increase the risk of decay.
Publisher Information
BRE
BRE is a building science centre that generates new knowledge through research. This is used to create products, tools and standards that drive positive change across the built environment. BRE helps its government and private sector clients meet the significant environmental, social and economic challenges they face in delivering homes, buildings and communities. BRE is owned by the BRE Trust, a registered charity. The Trust uses the profits made by the BRE companies to fund research and education that advances knowledge of the built environment.
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