Passive fire protection specialists
Protecting people. Protecting property. Protecting trust.
Fire stopping, compartmentation, fire doors, cavity barriers and intumescent coatings — every installation photographed, recorded and traceable.

What we install
Services
Fire Stopping
Sealing service penetrations and linear gaps through fire-rated walls and floors. Installed to the manufacturer's tested detail and recorded per location.
Learn moreabout Fire StoppingCompartmentation
Surveying, upgrading and reinstating compartment lines in walls, floors, ceilings and risers. Defects are photographed, scheduled and closed out.
Learn moreabout CompartmentationFire Doors
Supply, installation, inspection and remediation of timber fire doorsets and their ironmongery. Each door is reported individually with photographs.
Learn moreabout Fire DoorsCavity Barriers
Horizontal and vertical cavity barriers in external wall systems, roof voids and ceiling voids. Open-state barriers installed behind rainscreen cladding.
Learn moreabout Cavity BarriersIntumescent Coatings
Thin-film intumescent coatings to structural steelwork for 30 to 120 minutes of fire resistance. Dry film thickness recorded member by member.
Learn moreabout Intumescent Coatings



20+
Years of director-level passive fire protection experience
About ALF
Experienced leadership. Specialist delivery. Evidence that stands up to scrutiny.
Our directors bring more than two decades of hands-on experience across passive fire protection, including complex programmes for high-profile clients and exacting project teams. That experience shapes every survey, specification, installation and handover.
About our experienceTraceability
Installed. Photographed. Recorded.
01
Survey and specification
We survey the works and specify each detail against a tested system, so the intended fire resistance period and the tested detail reference are agreed before anyone starts.
02
Installation by trained operatives
Our operatives install using manufacturer-approved systems and manufacturer training, to the tested detail and the substrate conditions it was tested in.
03
Photographic record
Every detail is photographed and tagged by location, drawing reference and system. The schedule is issued in the handover pack.
Our pillars
Protect
Compartment lines installed to the tested detail.
Prevent
Defects found on survey before they become failures.
Comply
Work specified against published standards and test data.
People
Trained operatives, manufacturer systems, RAMS in advance.
Trust
Evidence handed over, so the record stands on its own.
Sectors we work in
- Main Contractors
- Developers
- Housing Providers
- Facilities Management
- Healthcare
- Education
- Commercial
Send us your drawings and we’ll come back with a priced, itemised proposal.
Request a quoteWorking across London, Essex and the South East, and nationally by arrangement.