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ISO 21129:2007

Hygrothermal performance of building materials and products — Determination of water-vapour transmission properties — Box method

Standard Details

ISO 21129:2007 specifies a box method for determining the water-vapour permeability of building materials. The box method is used primarily to measure the water-vapour permeance of materials that have low water-vapour resistance, in which the influence of the surface-humidity transmission-resistance cannot be ignored.

General Information

Status : Published
Standard Type: Main
Document No: ISO 21129:2007
Document Year: 2007
Pages: 11
Edition: 1
  • ICS:
  • 91.120.10 Thermal insulation of buildings

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ISO 21129:2007
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