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Condensation, heat transfer and ventilation processes in flat timber-frame cold roofs.

Author(s) : SIMPSON A., CASTLES G., O'CONNOR D. E.

Type of article: Article

Summary

The results show that vapour barriers and ventilation are of paramount importance if the airspace is to be prevented from reaching saturation conditions, resulting in dangerous levels of moisture in the timber deck and support elements. The minimum requirement for ventilation slot area was found to be an insufficient safeguard at low wind speeds, particularly in roofs without vapour barrier protection. At high wind speeds substantial heat losses from the cavity were measured. Predictive models are given for the vapour pressure distribution and heat losses from the cavity.

Details

  • Original title: Condensation, heat transfer and ventilation processes in flat timber-frame cold roofs.
  • Record ID : 1993-0411
  • Languages: English
  • Source: Build. Serv. Eng. Res. Technol. - vol. 13 - n. 3
  • Publication date: 1992
  • Document available for consultation in the library of the IIR headquarters only.

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