Services
Passive fire protection, installed to the tested detail.
We install using manufacturer-approved systems from Rockwool, Hilti, Nullifire, Promat and other leading manufacturers, always to the tested detail.
01
Fire Stopping
Fire stopping seals the openings made through fire-rated walls and floors so that a compartment continues to perform for its full fire resistance period. We seal service penetrations — pipes, cables, cable trays, ducts and trunking — along with linear gaps at wall heads, wall abutments and floor perimeters.
The correct system depends on the substrate, the aperture size and the services passing through it. We select from intumescent sealants, mortars, pillows, collars, wraps, batts and ablative coated boards, and install each one to the manufacturer's tested detail rather than an approximation of it. Where site conditions differ from the tested detail, we raise it before installation and agree an alternative tested system with the design team.
What we install
- Intumescent and acoustic-rated sealants to linear gaps and small apertures
- Fire-rated mortars and compounds to floor and riser penetrations
- Pillows and cushions to temporary or frequently altered service routes
- Pipe collars and wraps to combustible and plastic pipework
- Coated batt systems and ablative boards to large mixed-service openings
Standards and testing
Systems tested to BS EN 1366-3 (penetration seals) and BS EN 1366-4 (linear joint seals), classified to BS EN 13501-2.
Evidence we provide
Every seal is photographed before and after installation, tagged with its location, drawing reference and the tested detail reference used.
02
Compartmentation
Compartmentation is the line that fire stopping protects. We survey, upgrade and reinstate compartment lines through walls, floors, ceilings, risers and roof voids, in occupied buildings as well as on new-build sites.
A survey starts with the compartmentation strategy and the fire strategy drawings, then records what is actually present. We produce a photographic defect schedule, locating each defect and stating the remedial work required and the fire resistance period it must achieve. From there we agree a remedial programme that reflects access, occupancy and the priority of each defect, and reinstate the line using tested systems. Riser cupboards, ceiling voids above corridors and roof voids over compartment walls are the areas that most often fail; we treat them as standard scope rather than an extra.
What we install
- Compartmentation surveys with photographic defect schedules
- Reinstatement of compartment walls and floors to the required resistance period
- Riser and shaft sealing, including multi-level service risers
- Ceiling and roof void compartment lines
- Remedial programmes phased around occupied buildings
Standards and testing
Work specified against Approved Document B and the duties in the Regulatory Reform (Fire Safety) Order 2005.
Evidence we provide
Defect schedules and close-out photographs are issued together, so each recorded defect can be traced to the remedial work that closed it.
03
Fire Doors
A fire doorset only performs as a complete assembly: leaf, frame, seals, ironmongery and installation gaps. We supply, install, inspect and remediate timber fire doorsets, and we work on the assembly rather than the leaf alone.
Installation covers frame fixing centres, packing and perimeter sealing, intumescent strips and cold smoke seals, hinges, locks, latches and self-closing devices, and gap tolerances at the head, jambs and threshold. On existing stock we carry out periodic inspections against the same criteria and report each door individually, so a housing provider or facilities manager can see which doors pass, which need adjustment and which need replacement. Where a door cannot be brought back into a compliant condition, we say so rather than adjusting it and calling it remediated.
What we install
- Timber fire doorsets, FD30 and FD60, with certified ironmongery
- Intumescent strips and cold smoke seals
- Self-closing devices, hold-open devices and hinges
- Gap adjustment, hardware replacement and leaf remediation
- Periodic fire door inspections with per-door photographic reports
Standards and testing
Doorsets tested to BS 476-22 or BS EN 1634-1, installed to the manufacturer's installation instructions and field of application.
Evidence we provide
Each door is recorded under its own reference with photographs of the leaf, seals, gaps and ironmongery, and its inspection outcome.
04
Cavity Barriers
Cavities let fire and smoke bypass a compartment line. Cavity barriers close those routes in external wall systems, roof voids and ceiling voids, and they only work where they are continuous and correctly fixed to both faces of the cavity.
We install horizontal and vertical barriers to the widths and fire resistance periods set by the design, including open-state cavity barriers behind rainscreen cladding where a ventilated cavity has to be maintained in normal use. Work is sequenced with the cladding and roofing contractors so the barrier is installed and inspected before it is covered, because a barrier behind a completed facade cannot be verified later without opening it up. Junctions, penetrations and changes of direction are recorded individually.
What we install
- Horizontal and vertical cavity barriers to external wall cavities
- Open-state cavity barriers behind rainscreen and ventilated facades
- Roof void and ceiling void barriers on compartment lines
- Barriers at window and door reveals and at cavity closures
- Sequenced pre-closure inspection with the cladding programme
Standards and testing
Specified against Approved Document B, with reference to BS 8414 system testing where the external wall build-up requires it.
Evidence we provide
Barriers are photographed in position before the cavity is closed, tagged by elevation, level and grid reference.
05
Intumescent Coatings
Structural steel loses strength as it heats. Thin-film intumescent coatings expand under heat to insulate the section and hold it below its critical temperature for the required period.
We apply coatings to structural steelwork for 30, 60, 90 and 120 minute fire resistance, calculating the required thickness from the section factor of each member and the manufacturer's loading tables. Scope includes surface preparation, primer compatibility checks and a topcoat where a decorative or protective finish is specified. Dry film thickness is measured and recorded member by member, because the record of the applied thickness is the only evidence that the specified period has been achieved. Where a member is under thickness, it is recoated and re-measured before sign-off.
What we install
- Thin-film intumescent coatings to beams, columns and bracing
- Section factor calculations and thickness schedules per member
- Surface preparation and primer compatibility checks
- Decorative and protective topcoats to specified colours
- Dry film thickness (DFT) readings recorded per member
Standards and testing
Assessed to BS EN 13381-8 and applied to the manufacturer's published loading tables for the specified period.
Evidence we provide
A DFT schedule is issued per member with photographs, alongside the product data sheets and the batch records for the material used.