• Envirograf FB/TS Cavity Barrier
  • Envirograf FB/TS Cavity Barrier

Envirograf FB/TS Cavity Barriers

Product 55 - FB/TS

We no longer stock this product, but can recommend as our nearest alternatives:

Please contact our Technical Team on 0113 2455450 (option 2) or send a message to [email protected] prior to purchase/use for advice on suitability.



FB/TS Cavity Barriers are backed with self-adhesive, simply pushing into place. Intumescent expands across cavities to seal against fire & smoke, up to 120 minutes. Ideal for party walls and floors and timber frames with brick, timber or tile facings.

  • Non-fibrous
  • Cut to length
  • Self-adhesive backing
  • Completely waterproof
  • 1m length
  • Other sizes made to order

Envirograf FB/TS Cavity Barriers, designed specifically for use with timber-framed buildings, the most common form of construction for housing and commercial services.

These sponge cavity barriers are quick and easy to fit into place. Non-fibrous, the barriers can be easily cut to size and have a self-adhesive backing, so can simply be pushed into place, either vertically or horizontally.

The FB/TS cavity barrier offers fire protection for timber frames with brick or timber facings, whilst the FB/TS/TB can also be used for timber frames faced with tiles. Intumescent facings expand during a fire, across the cavity to the exterior wall to seal up gaps against the spread of fire and smoke, with up to 2 hours fire protection. When burning, the barrier doesn't give off any toxic fumes.

Ideal for party floors and party walls, both loadbearing and non-loadbearing. Party walls, such as separating or compartment walls, have cavity areas at junctures and it is crucial that the correct passive fire cavity barrier is fitted in the correct position. FB/TS cavity barriers are ideal for use with rendered wall finishes.

These cavity barriers can also be used at the top of a party wall to seal against fire spreading into roof sections, and as a fire-stopping roof divider in connected houses and buildings that share roofs.


More sizes for larger cavities can be made on request; call our sales team to discuss your requirements on 0113 2455450 or [email protected].

Ref Dimensions Length
FB/TS 40mm x 50mm 1 metre
FB/TS 50mm x 50mm 1 metre
FB/TS/TB 40mm x 50mm 1 metre
FB/TS/TB 50mm x 50mm 1 metre

Envirograf Fire Cavity Barriers should be fitted by experienced professionals to ensure they are installed correctly. Products can only be guaranteed by Envirograf if fitted correctly and incorrect installations will be condemned if inspected. Check labels, fixing brackets, manufacturer installation instructions, etc. Should a site visit be required to check installation, this can be arranged upon request but will be chargeable.

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and ConditionsWe will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

Any Envirograf products to be used in or for Harrods department store should be authorised with our Technical Team prior to purchase.

Product Details
Product 55 - FB/TS

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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