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Cavity Fire Barrier

Fire Barrier On A 6.3 Metre Length Roll

Cavity Fire Barrier on a Roll at Stormflame

Key Points:

  • Fire tested 30 minutes
  • Prevents pushing out of bricks
  • Simply stapled in position
  • Reduced risk of damage
  • No Weep Holes needed – clean wall finish and no wind driven water issues
  • No Cavity Trays needed
  • Material and labour cost savings
  • Product is 4mm thick and therefore maintains air gap
  • Expands to fill cavity in event of fire
  • Takes up imperfections and misalignments
  • Restricts fire and smoke spread

Note: Only suitable for use behind brickwork/blockwork external walls. See Ventilated Fire Barriers for compatible fire barriers with alternative wall systems.

Cavity Fire Barrier on a Roll visual


The Astro Cavity Fire Barrier on a Roll provides overall cost savings compared with the traditional method of using Cavity Trays, Cavity Socks, and Weep Holes. Astro Cavity Barrier on a Roll is a fire rated solution for timber frame and masonry cavities. It is designed to replace more traditional cavity barriers such as mineral wool cavity barriers or cavity socks or timber battens which are prone to poor installation which can render them ineffective in a fire situation.

The low profile intumescent design ensures that the cavity remains open allowing brickwork to be laid unobstructed. In addition, the Astro Cavity Fire Barrier on a Roll also limits damage caused by falling masonry and moisture bridging whilst aiding ventilation. Particularly suited for Timber Frame Construction the Astro Cavity Fire Barrier is supplied in 6.3 metre lengths improving installation time and reducing storage requirements.


  • 75mm wide x 4mm thick x 6.3 metre long roll. Red only.
  • Product Code: AFCFBR75

How To Order:

  • It is essential that the correct fire barriers are specified and installed, therefore to place your Cavity Fire Barrier on a Roll order please fill in and email us the following interactive PDF form seen below
  • For all enquiries about Cavity Fire Barrier on a Roll please call us: 01329 841 416 or email us:


We have technical representatives who provide assistance in the selection and specification of the products on this site and should be consulted for exact installation and product suitability. Ensure an early engagement with ourselves, designers, main contractor and specialist installers before any installation. Other trades and/or manufacturers may need to be consulted. For in-depth information, specification and technical advice please call our Head Office on Tel: +(0)1329 841416 or email


All interested parties, designer, specifier, main contractor and specialist installers should provide access to allow the fire stopping seals to be regularly inspected and maintained, as well as records kept of such maintenance at minimum periods of 12 months, as required by the Regulatory Reform Order, and repaired if necessary. Reference should be made to ASFP TGD 17 – Code of Practice for the Installation and Inspection of Fire Stopping.


It is vital that those entrusted to design or install a fire stopping product have the necessary levels of competence to undertake the task professionally and thoroughly. The level of competency required will be commensurate with the expected complexity of the building. All designers must eliminate, reduce or control foreseeable risks that may arise during installation, construction or maintenance when preparing or modifying designs. Clients should ensure that the principal designer and principal contractor carry out their duties under CDM regulations. The ASFP foundation course in passive fire protection provides essential knowledge as part of demonstrating competency and understanding in this key fire protection specialism.

Additional Notes:

This product can only be supplied once the claddding enquiry form has been completed and approved by the manufacturer: Click the following link to download the: Cavity Barrier on a Roll Form.

Cavity Barrier order form:

Download and review any of the following information:

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