Article marked
Error occurred Please try again later
Back to overview

AIRSTOP DIVA+ Vapour Retarder fabric-reinforced

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

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

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

Product data

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

Processing guideline

INFO

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

(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.
(1) MECHANICAL ATTACHMENT OF THE VAPOUR BARRIER

(2) AIRTIGHT ADHESION

Airtight adhesion of the joints, connections and penetration points must be carried out using the AIRSTOP Adhesion system.
(2) AIRTIGHT ADHESION

(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.
(3) TRANSVERSE LATHING / MOUNTED AT INTERVALS

(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.
(4) LONGITUDINAL LATHING