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FH FORTE Fleece Vapour Retarder

is a supple vapour barrier for the airtight layer in roof, ceiling and wall construction. FH FORTE Fleece Vapour Retarder is generally for use in construction components that are vapour-permeable on the outside.

for sub-top use in refurbishment

Product data sheet

Available dimensions
Product data
Processing guideline
Downloads

FH FORTE Fleece Vapour Retarder

Available dimensions
Product data
Processing guideline
Downloads

Available dimensions

Article number	Type	Roll width	Roll length	Total area
2FHFSK	SK-DUO	1.5 m	50 m	2250 m²
2FHFVDB	Standard	1.5 m	50 m	2250 m²
2FHFVDB3	Standard	3 m	50 m	4500 m²

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Product data

Field of application

for roof and wall constructions
for exterior vapour permeable structural elements
in the interior

Advantages

transparent
soft, pliant
easy to install

a transparent vapour retarder for the airtight layer in roof and wall constructions. In general FH FORTE Fleece Vapour Retarder is suitable for use in building components that are non-vapour retardant on the outside. In constructions that are well sealed on the exterior (e.g. flat roofs, renovations) the low sd-value guarantees a high degree of drying towards the interior during the summer months. A check should be made in every case by carrying out a calculation (e.g. with WUFI) to ensure the suitability of this option. ISOCELL’s staff will be pleased to offer you technical support. The FH FORTE Fleece Vapour Retarder can also be used for the sub-and-top system in refurbishment.

Material composition

PP fleece + PP film

sd-value

2 (± 1) m

Temperature resistance

-40–80 °C

Weight

120 g/m²

Colour

White transparent

Weight per unit area

EN 1849-2

sd-value - Standard

EN 1931

Elongation - lengthwise

> 50 %

Elongation - crosswise

> 60 %

Elongation

EN 12311-2

Tensile strength - lengthwise

> 210 (-30) N / 50 mm

Tensile strength - crosswise

> 180 (-40) N / 50 mm

Tensile strength

EN 12311-2

Tear propagation resistance - lengthwise

> 180 (-30) N

Tear propagation resistance - crosswise

> 230 (-40) N

Tear propagation resistance

EN 12310-1

Storage

cool and dry

Fire performance

EN 13501_1 / EN 11925_2

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.