A2 High Impact Soffit Liner Boards
Soffit liners to reduce heat loss.
PRODUCT
AIM A2 High Impact Soffit Liner Boards offer excellent impact resistance and are used to provide an insulated lining to semi exposed soffits. They can also be used as internal linings for walls and ceilings.
They are available with a wide range of thicknesses of stonewool insulation backing.
The fibre cement facing board can be easily decorated to match design and colour schemes. However, decoration of the facing board would be outside of the scope of the classification for reaction to fire.
Pre-decorated and through coloured facing boards are available but these have not been classified for reaction to fire.
APPLICATIONS
Suitable for use with concrete soffits where a thermal or acoustic performance is required.
FEATURES
- Standard sizes ranging from 56mm to 256mm
- 6mm high impact facing boards
- Non standard sizes also available.
- Euroclass Reaction to Fire A2-s1,d0.
BENEFITS
- Can help achieve thermal performance of the construction.
- Thicknesses to suit the thermal resistance (U Value) required.
- Choice of insulation materials to suit the thermal resistance required.
- Provides protection to the underside of soffits, especially in car parks.
- Mineral fibre backed boards can contribute to the overall acoustic performance of the soffit / floor construction.

Example product installation schematic using materials by others

PHYSICAL INFORMATION
- Manufactured from an insulation slab bonded tofibre cement board.
- Suitable for semi exposed applications.
- The stonewool insulation backing is available instandard sizes of 50, 100, 130, 150, 160, 180 and 250mm.
Other non standard sizes are available on request. - High Impact rigid cement board facing:
- 6mm thick.
- 1200 x 600mm.
- Special sizes available on request.
- Cement Board in conformance with EN 12467.
- Euroclass A1 Non-combustible to EN 13501-1.
- Fully external grade / frost resistant.
- AIM A2 High Impact Soffit Liner Boards are suppliedstretch wrapped onto pallets with a showerproofpolythene pallet cover and edge protection.
Decoration
The facing of AIM A2 High Impact Soffit Liner Boards can be painted without any special priming using an alkali resistant paint or emulsion. Two coats of paint will usually give a satisfactory finish. NOTE: paint may contribute to fire load. Application may decrease the products Reaction to Fire performance.
AS STANDARD
All AIM A2 High Impact Soffit Liner Boards are made to order..
OPTIONS
AIM are able to manufacture insulation building boards with tissue or foil facings for soffit applications that do not require a high impact board finish.
AIM are also able to manufacture High Impact Soffit Liner boards with a variety of insulation materials including Compression Resistant Rockfibre CRR), Extruded Polystyrene (XPS), Expanded Polystyrene (EPS), polyisocyanurate (PIR) and Phenolic (PHN) boards for thermal insulation applications only.
Please contact our sales office for further details.
Available faced with UHD decorative rock fibre board, suitable for fully exposed exterior cladding applications.

TECHNICAL INFORMATION
THERMAL PERFORMANCE
U Value calculations for the project can be undertaken upon request.
ACOUSTIC PERFORMANCE
Mineral fibre backed boards can contribute to the overall acoustic performance of the soffit / floor construction. In testing a 136mm thick, stone wool back High Impact Soffit liner board achieved a 34dB RW reduction in sound transmission. Please contact AIM for further details.
TEST REPORTS
There is no European harmonsied standard or British standard covering the manufacture, performance and specification of insulated fibre cement boards.
The insulation used is manufactured to the relevant standard for the product.
The Fibre Cement board is manufactured to EN 12467. Acoustic testing is covered by Z11012 – Acoustic Performance BS EN ISO 10140-2.
AIM A2 High Impact Soffit Liner Boards manufactured with stonewool insulation are classified in accordance with BS EN 13501-1 as A2-s1,d0 “limited combustibility”. This applies to boards of a thickness from 56mm to 256mm. Test report WF547321 refers.
Please contact us for further details if required.

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.
INSTALLATION GUIDELINES
Fixing Direct to soffit
AIM A2 High Impact Soffit Liner Boards may be fixed directly to concrete soffit using suitable steel fasteners; the fixings supplier should be contacted for advice prior to installation, especially if a hard concrete has been specified.
Fixings are set in at least 50mm from the board edges, at the four corners of the board and at 600mm maximum centres.
If the relative humidity of the area being lined is subject to significant variation, expansion gaps should be left between the boards to accommodate possible movement.
It may be possible to adopt a different fixing pattern dependent on the type of fixings used and the substrate in which the fixing is to be secured. Please seek advice from your nominated fixing supplier.
Where the AIM A2 High Impact Soffit Liner Board needs to be cut to size, a skill saw fitted with TCT blade and suitable dust extraction should be used along with the appropriate personal protective equipment.
Fixing Via Timber Battens
Alternatively treated timber battens can be fixed to the concrete first and the AIM A2 High Impact Soffit Liner Boards then fixed to the battens. The battens should be fixed at 300mm centres for Compression Resistant Rockfibre, running down the length. The battens must provide at least 75mm bearing.
The Units are mechanically fixed to the battens by corrosion resistant fixings. The screws should be a pan head fixing installed with a controllable speed screw gun and not overdriven, to prevent undue compression of the insulation backing. We suggest avoiding any counter sunk fixings and hammer fixings. Please contact the sales office for more details.
It should be noted that this installation method is outside of the scope of both the classification report and the extended application report.
Where the AIM A2 High Impact Soffit Liner Boards are being attached to a framed backing, such as in the situation where they are being used to form a soffit under a trussed eave overhang, the framing must allow fixings at the centres specified above. Where this is not possible, or where there are problems with level alignment, a sub framing system needs to be used.
Fixing layout for 1200mm x 600mm AIM A2 High Impact Soffit Liner Boards

Fixing direct to soffit

Fixing via timber battens
This installation method is outside of the scope of both the classification report and the extended application report
ITEMS REQUIRED FOR INSTALLATION
- PPE abrasion resistant gloves
- PPE impact resistant goggles
- RPE dust mask - FFP3
- PPE impact resistant goggles
- Drill
- Screwdriver
- Tape measure
- Skill Saw and TCT blade
STORAGE
Products are supplied on wooden pallets with edge protection and a shower proof hood. Products should be stored away from the elements until ready for installation.
MAINTENANCE
This product does not contain moving parts and, if undisturbed requires no routine inspections or maintenance.
DURABILITY
AIM A2 High Impact Soffit Liner Boards 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. They do not degrade under the usual conditions found in buildings and will perform effectively for the life of the building.
HEALTH & SAFETY
The Facing Board contains crystalline silica which may be released when dry working (cutting / drilling). The insulation boards used to make AIM A2 High Impact Soffit Liner Boards are considered to be inert articles. Product Safety and Handling Information Sheets are available covering the various insulants and facing board used.
ENVIRONMENT
Global warming potential = zero AIM A2 High Impact Soffit Liner Boards are manufactured from a variety of insulation materials.
For product recycling of stone wool based variants, please contact: Rockwool T: 01656 868400
ORDERING
To order this product the following information will be required:
- Insulation board preferred.
- Insulation thickness or thermal resistance required.
- Board dimensions.
- Approximate quantity.
- Delivery location.
All AIM products 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.
TECHNICAL SUPPORT
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.