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Standard type: | DIN EN |
Name: | DIN EN 1931 |
Designation: | Abdichtungsbahnen - Bitumen-, Kunststoff- und Elastomerbahnen für Dachabdichtungen - Bestimmung der Wasserdampfdurchlässigkeit |
Akkreditiert: | nein |
Back to the list of standardsTests of this standard
Water vapour transmission rate (WVTR)/ Sd- value (water vapour diffusion-equivalent air layer thickness)
Determination of the Sd value according to the gravimetric method on diffusion open and diffusion inhibiting materials with Sd values of approx. 0.03- 10 m ( equivalent to a WVTR of approx. 4- 800 g/(m²xd) depending on the material and test conditions) as a quintuple determination. For diffusion-inhibiting, diffusion-blocking and diffusion-proof materials with Sd values of approx. 10- >1500 m (corresponds to a WVTR of approx. 0.005- 125 g/(m²xd) depending on the material and test conditions), we recommend the more rapid and more cost-effective electrolysis method (then deviating from the standard as a double determination).
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