Envirograf Timber Frame Cavity Barrier Range

Availability: In Stock


A range of lightweight, adhesive-backed cavity barriers, ideal for use in timber-framed buildings, party walls and cavity surfaces with with a rendered finish.

CV Strip Cavity Barriers A flexible, PVC and foil-clad intumescent strip with self-adhesive backing to adhere it to walls. High expansion intumescent will lock against the external side of the internal wall in a fire, giving full protection without affecting the outer wall.

FB/TS Cavity Barriers A fireproof sponge barrier with intumescent coating, clad in UPVC foil and red PVC coating to seal the barrier against moisture. Adhesive backing makes it easy to affix to the external face of the internal wall, expanding at medium pressure in a fire to seal off fire and smoke.

Envirograf Timber Frame Cavity Barrier Range


Both barrier ranges will provide a minimum of 2 hours protection when installed correctly.

CV strip barriers are ideal for modular buildings where space is limited, due to their small profile.

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.

Order References:

CV Cavity Barrier Strip

Ref                   Width         Thickness           gap size protection

CV30/4           30mm            4mm                    30/45mm

CV30/6           30mm            6mm                    50/60mm

CV30/8           30mm            8mm                    60/70mm

CV30/10 v      30mm          10mm                   80/90mm

CV30/12 v      30mm         12mm                 95mm/105mm

CV30/15 v      30mm          15mm               100/120mm

CV75/4            30mm          4mm                   30/50mm

CV75/10 v       75mm          10mm                 80/100mm

Available in 1 metre and 2 metre lengths.

V – with Brackets

FB/TS Cavity Barrier

FB/TS             Timber frame with brick/timber facing

50mm sponge & intumescent for party walls and floors

All 1m long.


Other cavity barriers are available to view here.


The information displayed about the products on this website is to be used for guidance ONLY. We advise that all customers contact our technical department to obtain a free no obligation specification and quotation before purchasing goods directly from the website.

Please be aware that any negligence caused by failure to obtain the relevant advice, or availment of our specification and estimation service, will absolve International Passive Fire Ltd from any liability should Passive Fire Protection Products prepared, or used, by the purchaser, or any other parties, result in damage to property or human life, or for any monetary costs incurred due to incorrect usage.


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Fire Rating


4mm, 6mm, 8mm, 10mm, 12mm, 15mm, 50mm, 40mm




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