Resumen
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.
Informaciones generales
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Estado: PublicadoFecha de publicación: 2007-07Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 11
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Comité Técnico :ISO/TC 163/SC 1ICS :91.120.10
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