Fire & Smoke Barriers Fire & Smoke Barrier Installation Certified cavity barriers and fire curtain systems to seal concealed voids in walls, ceilings and floors. Photographed before enclosure and fully documented. Our Case Studies Request a Quote What are Fire and Smoke barriers? Fire and smoke barriers, commonly referred to as cavity barriers, are passive fire protection elements typically installed within concealed spaces in a building’s construction. Their purpose is to subdivide voids in walls, ceilings, floors and roof spaces to prevent the unseen spread of fire and smoke between compartments. Approved Document B requires cavity barriers at specific intervals and at junctions between different fire compartments, as well as around openings and at the edges of cavities. Cavity barriers can take several forms, including intumescent strip barriers that expand when exposed to heat, mineral wool barriers that resist fire passage and flexible fire curtain systems designed for large or irregularly shaped voids. The correct system depends on the void type, size, orientation and the fire resistance period specified in the fire strategy. Products we use Tested systems from industry leading manufacturers We work exclusively with the UK’s most trusted passive fire protection manufacturers. Every product we install is third-party tested, fully certified and matched precisely to the tested detail your project requires. What We Do We deliver a fully managed cavity barrier service from initial design review through to installation, inspection and handover, ensuring every barrier is installed to the manufacturer’s tested detail and fully documented for compliance sign-off. Design Review & Void Identification: Before any installation begins, we carry out a detailed review of the fire strategy, architectural drawings and ceiling or roof void details to identify every location where cavity barriers are required. This includes junctions between compartment walls and ceiling voids, perimeter edges at curtain walling and external wall interfaces, junctions around openings, service risers and any void that crosses a compartment line. Cavity barriers are one of the most frequently missed elements in passive fire protection. Voids are concealed, which means barrier locations are often overlooked during design or omitted because the void was not identified on the drawings. We carry out a thorough review at the earliest opportunity to ensure nothing is missed and where we are engaged after construction has progressed, we survey the as-built conditions on site to identify any locations that have been overlooked or that differ from the original design. What We Do Installation: Our installers are FIRAS-certified and experienced across the full range of cavity barrier systems. We work with products from leading manufacturers including Quelfire, Rockwool, Siderise, AIM, Nullifire, FireFLy and FSi, selecting and installing the correct barrier type for each specific application. We cover the full scope of cavity barrier installations including open-state intumescent barriers for ventilated voids, mineral wool compression-fit barriers for enclosed cavities, flexible fire curtain systems for large or irregular voids, perimeter cavity barriers at curtain wall and rainscreen junctions and barriers within timber frame, SFS and modular construction systems. Each barrier is installed in strict accordance with the manufacturer’s tested detail, with particular attention to continuity at junctions, correct compression or fixing, and the interface between the barrier and adjacent fire-rated elements. Inspection & Quality Assurance: Every cavity barrier we install is inspected against the manufacturer’s tested detail and photographed in situ before the void is closed out. This is critical, once ceilings, walls or cladding systems are closed, the barriers become inaccessible. Our inspection process ensures every barrier is verified, recorded and evidenced while it is still visible, eliminating the risk of failed inspections requiring costly and disruptive opening-up works later in the programme. Request a Quote What We Do Documentation & Handover: On completion, we provide a full handover package including photographic evidence of every barrier installation, the manufacturer’s test reference, barrier type and specification, location details and confirmation that each installation falls within the scope of the tested approval. Our documentation is prepared to satisfy building control, third-party inspectors and Gateway sign-off without delay. Remedial Works: We regularly carry out remedial cavity barrier installations where barriers were missed during the original build, damaged by follow-on trades or identified as non-compliant during inspection. We survey the extent of the deficiency, confirm the correct tested detail for each location and carry out the remedial work with the same level of certification and documentation as any new installation. Frequently Asked Questions Where are cavity barriers required in a building? Cavity barriers are required at junctions between fire compartments, around openings in cavities (such as windows and doors), at maximum spacing intervals specified in Approved Document B and at the edges of cavities. The exact requirements are determined by the fire strategy for your building. Why is documentation for cavity barriers so important? Cavity barriers are concealed once other trades complete their work. Without photographic evidence and installation records, proving compliance at inspection can be extremely difficult. Our documentation provides a clear audit trail that satisfies building control and third-party auditors. Which cavity barrier products do you install? We work with leading manufacturers including Firefly, Rockwool, Siderise and Quelfire. The specific product is selected based on the tested detail required for each void type and fire resistance period. Contact