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AIRSTOP DIVA FORTE

THE STAR AMONG THE VAPOUR BARRIERS

With AIRSTOP DIVA FORTE ISOCELL have developed a transparent, tear-resistant vapour barrier. The special membrane reacts to the moisture in the surrounding atmosphere. With sufficient solar insolation the water vapour diffusion is transported to the interior of the construction and favourably influences the drying of construction components during the summer. A strong PES membrane guarantees very good stability.

AIRSTOP DIVA FORTE MOISTURE-VARIABLE VAPOUR BARRIER

ThE ADVAnTAgEs AT A glAncE

• moisture-variable• high sd – value spread• transparent • tear-resistant• technically mature• permanent• printed cutting line

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When using vapour barriers with variable sd-values, particular attention must be paid to the construction sequence. The general rule is: first wet then dry. Tasks causing a high degree of moisture in the construction, e.g. wall and ceiling plastering, laying screed etc. must be done before the dry work proces-ses. After evaporation of the building’s moisture, installation of the vapour barrier and/or insulation can begin.

CORRRECT INSTALLATION

laying instructions: 1. Attach AIRSTOP DIVA FORTE transverse to the position of the rafters, joists or beams with the printed, smooth side facing the installer. The strips are fixed mechanically to the construction wood using a staple gun. There should be an overlap of approx. 10 cm.2. Adhesion of the adjoining strips, connections and penetration points must be made airtight using the AIRSTOP Adhesion System.

:: The vapour barrier is attached to plastered brickwork, rough concrete or wood surfaces using AIRSTOP sealant SPRINT.

:: Penetration points such as ducts for extractors, solar or electrical equip-ment are sealed with the highly elastic BUTYL DEHNFLEX, sealed airtight with AIRSTOP sleeves for cables or penetrations.

3. Where blow-in insulation is to be used, the transverse lathing is mounted c-to-c < 30 cm. The transverse laths are mounted directly on the joins to relieve the adhesive joints.

The functional membrane of AIRSTOP DIVA FORTE changes its resistance to diffusion depending on the current humidity. Usually room atmosphere is dri-er in the winter months. The sd-value of the moisture-variable vapour barrier increases. This process results in the penetration of only a little vapour into the construction and/or into the insulation. At 25 % relative room humidity the sd-value of AIRSTOP DIVA FORTE increases to 20 m.

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ThE FuncTIOnAl pRIncIplE In wInTER - summER

wInTER summER

In summer the relative humidity is higher, particularly in the boundary layer between insulation and vapour barrier due to 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, the building component becomes drier. At 65 % relative room humidity the sd-value of AIRSTOP DIVA FORTE sinks to just 2.7 m.

AIRSTOP DIVA FORTE THE STAR AMOUNG THE VAPOUR BARRIERS

Construction elements with an airtight shell The function of a construction element depends on the structure, the climate, solar insolation, the location, the shade, use etc. In construction elements that are diffusion resistant on the exterior, drying from the room interior often ensures the hygrothermal func-tion. The moisture and thermal characteristics of a construction element can be simulated in theory using modern software.

Tips for the successful installation of challenging construction elements:• use only dry wood• checkairtightnesswiththeBlowerDoorTest• have the function of a construction element tested in advance

from a structural point of view • observe the construction process to avoid construction moisture and

flank diffusion

chAllEngIng ApplIcATIOns

Elements in which drying of the insulation layer is intended to take place in the direction of the room are subject to special requirements in planning and construction. Our technical department is pleased to advise you at technik@isocell.at.

air moisture [%]

sd - value [m]

201816141210 8 6 4 2 0 20 40 60 80 100

PRODUCT DATA

AIRSTOP DIVA FORTE

ISOCELL GMBH | A -5202 NEUMARkT AM WALLERSEE | BAHNHOFSTRASSE 36 | TELEFONE: +43(0)6216/4108FAx: +43(0)6216/7979 | E -MAIL : OFF ICE@ISOCELL .AT | INTERNET: WWW.ISOCELL .COM

Composition:

Roll width:

Roll length:

Roll area:

Roll weight:

Weight per unit area:

Tear resistance:

Elongation at rupture:

Tear growth resistance:

sd - value:

UV resistance:

Temperature resistance:

Storage:

Colour:

PES / PA

1,5 m

40 m

60 m²

approx. 5 kg

72 (± 10) g / m²

longitudinal: 159 N / 50 mmlateral: 123 N / 50 mm

longitudinal: 32 % lateral: 38 %

longitudinal: 38 Nlateral: 32 N

0,2 m - 20 m moisture-variable

none

- 40 °C to + 80 °C

cool and dry

transparent white with blue print

EN 1848-2

EN 1848-2

EN 1849-2

EN 12311-2

EN 12311-2

EN 12310-1

EN ISO 12572

AccEssORIEs

Slightly transparent adhesive tape for airtight adhesion. An adhesive particularly resistant to ageing for almost all substrates. Working temperature: from -5° C

AIRSTOP FlEX Adhesive TapeQuick drying, odourless special adhesive, a permanent, elastic seal for joints, joins of construction elements and sheet over-laps of vapour retarders and barriers in dry-lining.Working temperature: from -5° C

AIRSTOP sealant spRInT