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ISO 21129:2007

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

Publication date:   Jul 4, 2007

General information

90.93 Standard confirmed   Sep 5, 2022

ISO

ISO/TC 163/SC 1 Test and measurement methods

International Standard

91.120.10   Thermal insulation of buildings

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Scope

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.

Life cycle

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PUBLISHED
ISO 21129:2007
90.93 Standard confirmed
Sep 5, 2022