FFB-VS Open State Cavity Barrier is developed to protect the voids between the outer facade and the inner construction on element of the building.
FFB-VS a foil-faced stone wool pre-cut unit, which has a powerful intumescent graphite strip bonded to the exposed face. The intumescent graphite strip is pre-wrapped with a durable polythene adhesive sheet to prevent water ingress.
FFB-VS has been designed to provide a 25 mm air gap, that allows air flow and moisture to pass down the back of the cladding. Under fire conditions, the powerful intumescent along the front edge expands horizontally to close the gap and prevent the passage of fire.
Fischer horizontal fire barriers offer an expected life expectancy of over 25 years. Tested to suit voids up to 450mm deep to; BS476 to 120 and 60 minutes, and acoustic isolation on testing to EN10140 to 39 dB (non-ventilated).
Fire resistant testing to BS476 to 120 and 60 minutes
Acoustic isolation on testing to EN10140 to 39 dB (non-ventilated)
Suitable for close up to 25 mm ventilation gap
Voids up to 450 mm wide
Free of halogens, asbestos, fibres and silica and is non-toxic
Life expectancy of over 25 years
Contributes to green building
Concrete slabs, columns and walls
Curtain wall assemblies
Stone cladding, etc.
Horizontal and vertical cavities between the inner and outer construction elements
|Description||Foil faced stone with a black intumescent edge|
|Fire resistance - FFB-VS||BS467 20/22 60 min., DIN 4102 B2 - 30/30|
|Closure time - FFB-VS||needs to be > 5 min|
|Activation||Approx. 180 °C (intumescent material)|
|Expansion pressure||Approx. 07 N/mm2|
|Density||Stone wool - 80 kg/m3 intumescent 1.3 g/cm3|
|Open void size - FBB-VS||25 mm to 50 mm|
|Dimensions||75 mm Thick 1000 mm Long|
|Width||FBB-VS (30 mm to 450 mm)|
|Brackets||FBB-VS (3 per unit)|