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Timber Frame Cavity Stop Barrier FB/TS

Product 55


[ FB/TS ]

Cavity barriers designed for timber frame buildings and party walls or floors

Not available to purchase online.

We need to ask you a few more questions and ensure this is the suitable product for your needs.

To order please call us on +44 (0) 1 304 842 555

£0.00 ex. Vat



Timber Frame Cavity Stop

Timber Frame Cavity Stop, a fireproof sponge barrier designed with an intumescent coating. Expands at medium pressure in a fire to seal off fire and smoke.

  • Clad in UPVC foil and red PVC coating to seal the barrier against moisture.
  • In addition, a protective outer sleeve offers full condensation protection and up to 142 minutes fire rating.
  • As well as this, a high-tack adhesive backing makes it easy to affix to the external face of the internal wall.
  • Additionally, both cavity barrier ranges provide a minimum of 2 hours fire protection.

Cavity Barriers are pieces of fire-stopping material. They fit within the cavity of a building at each floor horizontally and party wall in a verticle position. The material provides compartmentation. Both the flames and heat cannot be transferred to other compartmental areas. Throughout the life of the building, the Cavity Barrier will remain fixed in place. In the event of a fire, the intumescent material expands and seals off the gaps. Additionally, the horizontal barriers allow for a ventilation gap within the cavity. Subsequently closing when the intumescent expands.

Our Cavity Barrier range at Envirograf® offers superb protection to your building by providing fire stopping. Explore the Cavity Barrier range online.


– Both barrier ranges will provide a minimum of 2 hours protection
– FB/TS is a more robust barrier that is ideal for load-bearing party floors and walls
– Easy to install with adhesive strip, but can be fixed down with screws or nails to provide additional fixing
– FB/TS Free-Air-Flow barrier tested to BS EN 1363-1 (1999), achieving up to 123 minutes fire protection.

Case Studies

  • Back to Basics at the School Yard

    Flexible strip cavity barrier used to provide cavity seal.

  • New Timber Frame Development in St. Albans

    Cavity Barrier protecting new development of timber frame studios.

Order References / Sizes


FB/TS Cavity Barrier – One metre long

FB/TS             Timber frame with brick/timber facing
50mm sponge & intumescent for party walls and floors

FB/TS/TB     Timber frame with tile facing
50mm sponge & 2 face intumescent
for party walls and floors

Sizes:      50mm x 50mm           40mm x 50mm