Hygrothermal performance of building materials and products — Determination of water-vapour transmission properties — Box method
NORMA vydaná dňa 4.7.2007
Označenie normy: ISO 21129:2007
Dátum vydania normy: 4.7.2007
Počet strán: 11
Približná hmotnosť: 33 g (0.07 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: 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.