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Fire I Barr Cavity Barriers

Designed to protect the building void between the inner and outer construction elements

fischer Fire|Barr FFB-VS Ventistop is a foil faced stone wool pre-cut unit which has a powerful intumescent graphite strip closing down ventilation cavity of open state rainscreen claddings in the event of a fire. The fischer Fire|Barr FFB-VS Ventistop is manufactured specifically to the ventilation cavity of your project. The fischer Fire|Barr FFB-VS is tested to the ASFP Technical Guidance Document TDG 19.

Product Description

  • 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

Available Product Variants

Application and Permission

Building materials
  • Concrete slabs, columns and walls
  • Curtain wall assemblies
  • Stone cladding, etc.
* You can find detailed information on building materials in the registration document.
For Details see corresponding Documents

Assembly Instruction

  • 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 condi-tions, the powerful intumescent along the front edge expands horizontally to close the gap and prevent the passage of fire.
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Documents for Downloading

Additional Documents