ISO 21129:2007
Hygrothermal performance of building materials and products - Determination of water-vapour transmission properties - Box method

Standard No.

ISO 21129:2007

Release Date

2007

Published By

International Organization for Standardization (ISO)

Latest

ISO 21129:2007

Scope

This International Standard 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.

ISO 21129:2007 Referenced Document

• ISO 9346 Hygrothermal performance of buildings and building materials - Physical quantities for mass transfer - Vocabulary*， 2007-10-01 Update

ISO 21129:2007 history

• 2007 ISO 21129:2007 Hygrothermal performance of building materials and products - Determination of water-vapour transmission properties - Box method