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Moisture convection performance on the joint of external wall and attic floor: laboratory tests and two-dimensional simulation model validation.

Author(s) : KALAMEES T., KURNITSKI J.

Summary

Full-scale laboratory measurements were conducted to determine moisture convection performance on the joint of external wall and attic floor. According to field measurements in previous studies, this joint is one of the most typical air leakage paths. On this joint also the highest air pressure difference forms in winter. Two commonly used external walls: timberframe and autoclaved aerated concrete walls were measured. The attic floor was in both cases a timber-frame structure. Results from the first laboratory measurement series showed that in leaky joint the moisture convection due to positive air pressure remarkable raised moisture accumulation rate on the inner surface of sheathing. A two-dimensional heat, air, and moisture transport computer model was validated for future analysis. The simulation results showed that CHAMPS-BES program is useful tool in assessing the moisture behaviour of building components including moisture convection.

Details

  • Original title: Moisture convection performance on the joint of external wall and attic floor: laboratory tests and two-dimensional simulation model validation.
  • Record ID : 2008-2642
  • Languages: English
  • Source: Clima 2007. WellBeing Indoors. Proceedings of the 9th REHVA World Congress [CD-ROM + Abstract book].
  • Publication date: 2007/06/10

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