AIM – Acoustic & Insulation Manufacturing has announced that its Wall Cavity Barrier (Red Edition) has been tested to provide fire performance in masonry construction without compression.
Raised access floor fire barrier system supports safe service penetrations
Raised access floor fire barrier designed for UK building services
AIM – Acoustic & Insulation Manufacturing has introduced a method for maintaining fire barrier integrity when services pass through raised access floors in UK buildings.
The company’s Raised Access Floor Barrier (RAFB) can now be paired with Rockwool FirePro Ablative Batts to support service penetrations without compromising fire performance.
According to AIM, the updated installation approach avoids the need for replacing the entire barrier with ablative material or seeking approval from a fire engineer.
The new solution is designed for installers, specifiers, fire consultants and raised access floor system holders.
The system is tested to BS EN 1366-4 and the principles of TR31 and provides up to 120 minutes of integrity and insulation.
Product design and installation process explained
AIM’s Raised Access Floor Barrier (RAFB) is used to prevent flame and smoke movement in underfloor cavities, create plenum chambers, and preserve the integrity of partitions.
To allow for service routes such as cable trays or pipework, AIM has developed a tested method combining the RAFB with two Rockwool FirePro Ablative Batts positioned either side of the barrier.
Services pass through both the AIM RAFB and the batts. Any remaining voids around the services are sealed with Rockwool FirePro Acoustic Sealant, along with pipe sleeves or pipe closers if required.
AIM confirmed that the addition of the Rockwool batts does not reduce the fire resistance rating of the original barrier.
This method enables service installation without disrupting the core fire-stopping function of the barrier.
Fire resistance certification and performance details
The RAFB system has been tested in accordance with BS EN 1366-4 and the principles of TR31.
The system has demonstrated up to 120 minutes of both fire integrity and insulation when used as specified.
According to AIM, the approach also reduces airborne sound transmission by up to 51 dB Rw when combined with an access floor system.
The barrier is manufactured from high-density Rockwool stone wool and faced with impervious foil on both sides.
It is supplied either cut to size or in full slabs for on-site cutting.
Retrofit options and sourcing information
AIM stated that its method supports phased installation, allowing services to be installed after the barrier is in place.
This retrofit capability may simplify scheduling and reduce disruption during staged fit-outs.
The Rockwool Ablative Batt can be purchased directly through AIM along with the RAFB or sourced separately through regular suppliers.
According to AIM, this offers flexibility for contractors procuring materials through established distribution channels.
Ian Exall, commercial director at AIM, said: “The many services required in modern offices are usually run through raised access floors, so must pass through dedicated fire barriers. AIM’s improved technical solution for accommodating services combines our RAFB with Rockwool Ablative Batts. It is tested and cost effective compared with building the whole fire barrier from an Ablative Batt.”
Raised access fire barriers used in UK construction
The Raised Access Floor Barrier is primarily used in UK commercial buildings where raised floors accommodate large volumes of mechanical and electrical services.
In these settings, the barrier maintains the continuity of fire compartmentation under floor voids.
The solution is part of a wider set of fire safety measures required for compliance with UK building regulations.
AIM is part of the Performance Technology Group and manufactures thermal, fire and acoustic insulation products from its UK facility.
More information, including the RAFB datasheet, is available at: https://www.aimlimited.co.uk/solutions/raised-access-floor-barrier/
Raised access floor fire barrier system supports safe service penetrations: Summary
AIM has introduced a method for allowing services to pass through raised access fire barriers.
The solution combines the AIM Raised Access Floor Barrier with Rockwool Ablative Batts.
The method is designed to maintain the fire integrity of the barrier.
It is tested to BS EN 1366-4 and the principles of TR31.
The system can provide up to 120 minutes of integrity and insulation.
AIM stated that the fire rating is not reduced by the addition of the batts.
The method avoids full replacement of the barrier when routing services.
It can be installed in retrofit applications.
The RAFB also reduces sound transmission by up to 51 dB Rw.
Materials are available directly from AIM or through standard suppliers.
The system is used in UK commercial buildings with raised floors.
AIM CPD module covers cavity barriers in rainscreen cladding
AIM introduces CPD module for architects and specifiers
AIM – Acoustic & Insulation Manufacturing has launched a new CPD module designed for architects and specifiers, focusing on cavity barriers in rainscreen cladding.
The one-hour session covers passive fire protection and updated regulations related to fire cavity barriers.
It also examines the use of various products attached to or integrated into facades.
Key topics covered in the CPD module
The module provides information on product installation sequences, fire testing, and distinctions between ‘Resistance to Fire’ and ‘Reaction to Fire’ terminology.
It also addresses fire compartmentation within external walls, referencing guidance from the Association of Specialist Fire Protection (ASFP).
The training aims to enhance architects’ and specifiers’ understanding of these areas, ensuring they are informed on best practices for fire safety in facade construction.
AIM’s experience in passive fire protection
AIM has developed the module based on 35 years of experience in designing, manufacturing, and testing passive fire insulation products.
The training is delivered by AIM’s specification manager Simon Mayes, who has 20 years of industry experience working with manufacturers such as British Gypsum, Saint-Gobain Isover, Komfort, Cembrit, Siderise, and Proteus Waterproofing.
Mayes has worked with architects, designers, and main contractors to supply fire, acoustic, and thermal products.
His expertise informs the content and practical applications covered in the module.
Availability and industry feedback
The CPD module is available both online and in person.
Nigel Marcoolyn, Founding Director and Architect at Made Architects, attended the module and commented: “Attending a CPD on passive fire protection is not just about enhancing knowledge – it’s about further equipping ourselves with the tools to safeguard lives, protect property, and contribute to a safer, more resilient built environment.”
AIM CPD module covers cavity barriers in rainscreen cladding: Summary
AIM – Acoustic & Insulation Manufacturing has launched a CPD module focusing on cavity barriers in rainscreen cladding.
The one-hour session covers passive fire protection, fire testing terminology, and fire compartmentation, incorporating ASFP guidance.
The module is presented by AIM’s specification manager Simon Mayes, who has 20 years of experience in the construction industry.
It is available online and in person.
AIM, a member of the ASFP, designs and manufactures third-party tested fire, thermal, and acoustic insulation products.