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Moisture-variable, fabric-reinforced vapour retarder for use in the air-tight layer. High back-drying potential with adequate sun exposure.
AIRSTOP DIVA+ Vapour Retarder fabric- reinforced
A moisture-variable vapour retarder for use in the air-tight layer. The functional membrane changes its diffusion resistance depending on the current humidity. During the winter months room atmosphere is generally dryer. The sd-value of the vapour retarder increases. This process results in the penetration of only a little water vapour into the construction and/or into the insulation. In summer, when there is sufficient solar insolation, the relative humidity behind the membrane is higher as a result of reverse diffusion. The water molecules are stored in the membrane. The sd-value sinks, causing more water vapour to escape from the construction and into the rooms and the building element becomes dryer.
Material Composition Non-woven composite made from polymers with filament reinforcement Colour Transparent white with blue print Weight 110 g/m² Weight per unit area (± 5 %) Weight per unit area EN 1849-2 sd-value 0.5 m sd-value 30 m sd-value - Standard EN ISO 12572 Temperature resistance -40 °C Temperature resistance 80 °C Elongation - lengthwise 20% Elongation - crosswise 20% Elongation EN 12311-2 Tensile strength - lengthwise 350 (± 20) N / 50 mm Tensile strength - crosswise 315 (± 20) N / 50 mm Tensile strength EN 12311-2 Tear propagation resistance - lengthwise 350 N (-25 / +35) Tear propagation resistance - crosswise 375 N (-25 / +35) Tear propagation resistance EN 12310-1 Storage
cool and dry