Astroflame Passive Fire Protection Products

Trade Name: Astro Cavity Fire Barrier Roll

Cavity Fire Barrier Roll

Tested to BS 476 Part 20.

30 Minutes Fire Rating.

For cavities up to a nominal 50mm.

Suitable for timber & masonry cavities and behind door and window jambs.

Prevents thermal & moisture bridging.

Reduces the need for unsightly ventilation and drainage apertures.

Low Profile Design.

Prevents pushing out of bricks or distortion of cladding.

Compact Roll.

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

Cavity Fire Barrier Roll

View a range of styles

>> See more : Additional product images

>> Call us to order: 01329 844 500

>> Email us to order:


Cavities are created in many wall constructions to aid thermal insulation performance and to provide a moisture barrier. Such constructions are common in residential, public and commercial buildings.

Completely closing the cavity, for example with solid cavity barriers, can detract from its performance and can result in both thermal and moisture bridging and potential structural damage.

These wall cavities can form unrestricted chimneys which, if left unprotected, can allow fire to spread both vertically and horizontally around a building.

Cavities are subject to Building Regulations and most should be fitted with fire barriers to prevent the spread of fire via the open cavity.

To combat this Astroflame as part of its continuing development of passive fire protection solutions has developed a Cavity Fire Barrier On a Roll.

NOTE: Not suitable for use with rainscreen cladding or timber cladding systems. See Ventilated Fire Barriers for rainscreen and timber compatible fire barriers.

Product Availability

Available in 6.3 metre length.

Product Code

Product Description



Astro Cavity Barrier on a Roll


To Order & Specify

Please contact us and quote the following - Quantity / Product Code / Product Description / Size
Typical example:- 10 / AFCFBR75 / Astro Cavity Barrier on a Roll / 75x4x6300mm

>> Tel: 01329 844 500 or >> Email:

Test and Assessment Reports

Astroflame Cavity Fire Barriers On a Roll are tested in combustible cavity structures to BS 476 Part 20: 1987.
Test Report No. Chilt/IF07077
30 Minutes Fire Integrity with 20% over run without failure.


For further information on installation requirements contact the technical team on: tel 01329 844 500
or email

Health and Safety

The product does not present any known health hazards during or after installation. Normal good industrial and personal hygiene practices should be observed. For further information on health and safety requirements please contact the technical team on: tel 01329 844 500 or email


Astroflame (Fire Seals) Ltd. Intumescent House
Unit 8, The IO Centre, Stephenson Road, Segensworth
tel 0800 023 2482
(01329 844500)
fax 0800 023 2483
(01329 844600)
tel +44 1329 844500
fax +44 1329 844600



Email Astroflame