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AIRSTOP DIVA+ Vapour Retarder fabric-reinforced

Moisture-variable, fabric-reinforced vapour retarder for use in the air-tight layer. High back-drying potential with adequate sun exposure. See our product data sheet!

HIGH SD-VALUE RANGE
TEARPROOF

Product data sheet

Available dimensions
Product data
Processing guideline
Downloads

AIRSTOP DIVA+ Vapour Retarder fabric-reinforced

Available dimensions
Product data
Processing guideline
Downloads

Available dimensions

Article number	Roll width	Roll length	Rolls / Pallet	Total area		Inquiry List
2DIVAGV	1.5 m	50 m	24 rolls	1800 m²
2DIVAGV3	3 m	50 m	30 rolls	4500 m²

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Product data

Field of application

flat roofs
construction components with permeable and impermeable outer shell in new constructions and refurbishment
for wall, ceiling and roof

Advantages

transparent
moisture-variable with a very high sd-value range
printed cutting line
tear resistant

Is 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

Fire performance

Processing guideline

INFO

Vapour barriers can used with wall, roof and ceiling construction elements as an airtight layer and as a vapour retarding layer.

(1) MECHANICAL ATTACHMENT OF THE VAPOUR BARRIER

The vapour barrier is usually attached transverse to the position of the rafters, joists or beams with the smooth and/or printed side facing the installer. The lengths are fixed mechanically to the construction’s wood with approx. 10cm overlap using tacking staples. For metal C-studs a temporary attachment using double-sided adhesive tape or even a spray-on contact adhesive is a possibility.

(2) AIRTIGHT ADHESION

Airtight adhesion of the joints, connections and penetration points must be carried out using the AIRSTOP Adhesion system.

(3) TRANSVERSE LATHING / MOUNTED AT INTERVALS

The laths underneath the vapour barrier have to be mounted before the cellulose is blown in. The centre distance shall be less than ≤30 cm. The joints of the vapour barrier also have to be covered by an additional lath. Glued connections and joints that were under tension have to be mechanically secured. The membrane has to be applied without tension.

(4) LONGITUDINAL LATHING

When no transverse lathing is used, e.g. if formwork is installed on longitudinal lathing, the vapour barrier must be placed parallel to the rafters or to the construction. The joints must lie on the wood of the construction and be stapled overlapping and sealed using AIRSTOP adhesive tape. Before the insulation is blown in the longitudinal lathing must be mounted to provide mechanical relief of the joints.