Cavity Fire Closers
A barrier that prevents fire escaping from or entering into the external wall cavity around openings.
PRODUCT
The AIM Cavity Fire Closers have been designed to close cavities for fire, thermal and acoustic purposes; it reduces cold bridging when closing cavities at door and window frames.
APPLICATIONS
The primary use of a cavity fire closer is to stop fire
escaping from or entering into the external wall cavity
around openings in the building envelope. This helps
ensure that the detailing around the opening provides
a protected means of escape from the building in the
event of a fire.
AIM Cavity Fire Closers can be used around openings
such as a window or door. They can also be used
as a cavity barrier within extensive cavities where
the cavity, within the wall structure, is in excess of
20m long.
FEATURES
• A strip of Rockwool Stone Wool insulation laminated to a Polythene DPC
• DPC Polythene conforming to BS 6515
BENEFITS
• Closes cavities up to 100mm thick*
• Prevents cold bridging
• Close cavities for fire, thermal and acoustic purposes
• Helps ensure that openings in cavity walls do not encourage the spread of fire into or out of the cavity (for up to two hours)
• Reduces cold bridging when closing cavities at door and window frames
• Test evidence supports the use within a wider range of substrates compared to other products (masonry, timber frame and through wall constructions).
* For cavities in excess of 100mm, please use the AIM Wall Cavity Barrier complete with Polythene DPC.
COMPONENTS AVAILABLE FROM AIM
Barrier
Fixing Clip Two fixing clips per length of barrier
Acrylic fire rated intumescent mastic (optional extra)
PHYSICAL INFORMATION
- Thermal Conductivity: λ = 0.034W/mK
- Rockwool stone wool insulation
- Length: 1200mm
- Common widths: 100, 150, 190mm
- Thickness: 20, 50, 65, 75, 100mm – bespoke sizes available on request.
- DPC Length: 1300mm
- DPC Side Overlap: 40mm
- DPC End Overlap: 100mm
- Non-standard sizes and DPC offsets are available.
- Cavity Closers are for use in cavities up to 100mm (for 100mm+ use the AIM Wall Cavity Barrier with a DPC)
- AIM Cavity Fire Closers are installed under compression (5% compression required) and with fixing clips
- Packaging: AIM Cavity Fire Closers are generally packed into cartons and stretch wrapped onto wooden pallets with a showerproof polythene pallet cover and high quality edge protectors
AS STANDARD
AIM Cavity Fire Closer is supplied pre-cut in 1200mm
lengths, widths and thicknesses vary depending on
the fire rating required. The product supplied is as
required to fill the void.
The product is supplied pre-cut to suit the cavity size
and complete with the required fixing clips.
AS STANDARD
AIM Cavity Fire Closer is supplied pre-cut in 1200mm
lengths, widths and thicknesses vary depending on
the fire rating required. The product supplied is as
required to fill the void.
The product is supplied pre-cut to suit the cavity size
and complete with the required fixing clips.
TECHNICAL INFORMATION
The AIM Cavity Closer system has been designed to
close a variety of cavities for fire, thermal and acoustic
purposes; it reduces cold bridging when closing
cavities at door and window frames. The AIM Cavity
Closer will accommodate movement in the building
and allow for any irregularities in the cavity.
Approved Document B, which states, “A cavity barrier
should, wherever possible, be tightly fitted to a rigid
construction and mechanically fixed into position”
(Clause 5.22 Volume 1: Dwellings and clause 9.14
Volume 2: Buildings other than dwellings).
FIRE PERFORMANCE
The product has been tested to BS EN 1366-4 to
provide up to 120 minutes integrity and insulation.
The AIM Cavity Fire Closer has been tested vertically
and horizontally to BS EN 1366-4
Fire Rating
Cavity width 100mm
| Application | Integrity / Insulation |
|---|---|
| Masonry to Masonry | 120/120 minutes |
| Masonry to Softwood | 60/30 minutes |
| Masonry to OSB | 60/60 minutes |
| Masonry to CP Board / SFS | 60/60 minutes |
Fire rating (integrity / insulation) - all horizontal and vertical use.
DPC
The DPC conforms to BS 6515:1984
ACOUSTIC PERFORMANCE
AIM Cavity Closer may be used to prevent the passage of flanking sound within masonry cavities. It complies with Approved Document E to the Building Regulations and provides at least 14db RW (75mm wide) 18db RW (100mm) 23db RW (140mm). It also helps in achieving requirements of Robust Details. Test conducted in accordance with BS EN ISO 10140-2.
TEST REPORTS
WF 432745 = Masonry
WF 399452 = Timber & SFS
WF 414885 = Timber & SFS
Z11012 – Acoustic Performance – Testing on mineral
fibre insulation. To BS EN ISO 10140-2.
APPLICATION DETAILS
More drawings available in the Technical Guide which can be downloaded above.
INSTALLATION GUIDELINES
The AIM Cavity Closer should be fitted under
compression, in conjunction with fixing clips and with
the DPC against the inside face of the outer wall,
one 40mm DPC overlap extending into the cavity,
and the other overlap protruding from the cavity. This
protruding lap should be folded against the side of the
outer brickwork behind the window or door frame.
Where more than one AIM Cavity Closer is required,
the Closers should be fitted with 100mm DPC overlap
at the base. The next Closer should be installed to
give a tight butt joint of the mineral wool insulation.
The top of vertical cavity closers should be protected
by a cavity tray or sealed to the underside of the lintel
ITEMS REQUIRED FOR INSTALLATION
- PPE abrasion resistant gloves
- PPE impact resistant goggles
- RPE dust mask
- Drill
- Screwdriver
- Tape measure
STORAGE
Products are supplied in cartons on wooden pallets
with edge protection and a shower proof hood.
Orders can be supplied without cartons on request.
Products should be stored away from the elements
until ready for installation.
MAINTENANCE
This product does not contain moving parts and,
if undisturbed in the cavity, requires no routine
inspections or maintenance.
It is recommended that the integrity of the barrier is
rechecked if further works are carried out that may
have involved disturbing the product.
DURABILITY
AIM fire barriers are chemically inert, will not sustain vermin and do not encourage the growth of rot, fungi, moulds or bacteria. They are compatible with all normal building materials. Rockwool stone wool has been proven in service for over 60 years, in a wide range of climates and degrees of exposure. It will generally perform effectively for the lifetime of the building, plant or structure.
HEALTH & SAFETY
Insulation products supplied by AIM are considered
to be inert articles and as such are exempt from
requirements to provide a Safety Data Sheet.
A Product Safety and Handling Information Sheet is
available upon request.
ENVIRONMENT
Global warming potential = zero
AIM fire barrier products are manufactured from stone wool insulation which is universally recognised as being a sustainable and environmentally friendly material.
Rockwool Stone Wool products may be recycled at the end of their life by Rockwool Ltd.
Call 01656 868400 or email [email protected] for further details.
ORDERING
To order this product the following information will be required:
• Cavity depth in mm
• Approximate quantity
• Delivery location
All AIM fire barriers are made to order. Products are typically supplied in seven to ten working days but lead times may vary depending on existing factory commitments.
There is no minimum order quantity or value although small orders may attract transport surcharges.
STORAGE
TECHNICAL SUPPORTTechnical Support is available from our experienced sales team on 01293 582 400 or [email protected]
Our Partners & Affiliates
AIM are partners with NBS. Our products can be found on NBS Source and have been authored to NBS specification standards and have both CAWS and Uniclass 2015 classifications.
AIM are members of Centre for Window and Cladding Technology & ASFP.
AIM are working in partnership with Rockwool.