Fire Stopping Contractors & Compartmentation Installation in London & the Thames Valley
Firestopping for Gateway 2 handovers across London, installed as tested and evidenced so your handover holds. Delivered by a BM TRADA Q-Mark certified team.
Holds in a fire. Holds up in an audit.
Holes in fire-rated walls are how fire spreads through a building. We seal them, prove every seal, and hand you evidence that stands up at sign-off.
Before you appoint any contractor, ask for per-seal photos, tags and a traceable handover record. Skyline hands you exactly that, ready for building control, the BSR and insurers.
- Tested systems, installed exactly as tested No engineering shortcuts. No “site decisions” on safety-critical seals.
- Alongside your other trades Firestopping installation that stays flexible in a dynamic environment and works the way construction actually runs.
- Certified, experienced installers BM TRADA Q-Mark third-party installer certification, audited on the workmanship itself. See how a certified installer compares to a generalist, then verify our certificate number on the BM TRADA Q-Mark register.
Skyline delivers the fire stopping London developers can defend, across Greater London, the Thames Valley and the M4 corridor, from our Henley-on-Thames base.
Read the video transcript
The purpose of Skyline is to make the UK much safer. It's simply put, there are just not enough buildings that have the highest standard of fire stopping or passive fire protection fitted. And it's my purpose and Skyline's purpose to make sure that we change that.
We want every building to be as safe as possible. We want every resident, every tenant, every homeowner who lives in a building, a high-rise building, to be as safe as possible and to be safe from the risk of fire.
We've all seen in the news what happens when buildings aren't correctly fire safe. And no one wants that to happen. Our purpose is to make sure that that doesn't happen again.
Firestopping services
Every firestopping installation below is delivered the same way: tested firestopping materials and products, installed exactly as tested, photographed and captured in the golden thread before it’s covered over.
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01
Penetration Firestopping
Single and multi-service penetrations through fire-rated walls and floors, sealed with tested systems. Every seal photographed before cover-up.
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02
Linear Gap Sealing
Junction and head-of-wall gaps sealed to match joint movement, substrate and required fire rating, using tested mastic or coated batt systems.
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03
Cavity Barrier Installation
Cavity barriers closing concealed spaces and external wall build-ups, each barrier cut and fixed to close the cavity as the tested detail requires.
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04
Fire Barrier Installation
Fire barriers installed to form the compartment line, so fire and smoke stay contained to their designed zone, evidenced as the work goes in.
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05
Structural Steel Fire Protection (Intumescent Coatings)
Intumescent coating systems protecting structural steel and load-bearing elements, specified per member and recorded per member.
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06
Beam Clad Firestopping Systems
Beam clad systems boarding structural beams to their required fire rating, installed exactly as tested.
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07
Fire Batt Systems
Coated fire batt systems closing openings and service penetrations, cut, fitted and sealed to the tested detail.
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08
Fire Collars & Wrap Systems
Intumescent collars and wraps on plastic pipes and combustible services, fitted exactly as tested and recorded seal by seal.
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09
Smoke Sealing
Smoke sealing at penetrations, joints and junctions, so smoke stays contained to its designed zone as well as fire.
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10
Compartmentation Remedial Works
Correcting defective or failed firestopping identified on survey or at handover, closed out with tested systems and a photographed record.
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11
Passive Fire Protection Packages
The full passive fire protection (PFP) scope delivered as one coordinated package, with one evidence record across every system.
Proof, per seal — the evidence pack you hand over
Photographed before cover-up. Every penetration, joint and cavity: photographed before, during and after installation. Every seal tagged — company, installer, date.
Built as the work goes in. The record builds into your Gateway 2 / Golden Thread pack as work proceeds. It's what building control, the BSR and insurers check at sign-off.
Proven on the landmarks. The same discipline behind The Gherkin, Olympic Park and Grosvenor Square. What you hand over: proof, per seal, that the line holds.
We work backwards from your deadline
Pragmatic, professional, relationship-led: we work backwards from the building’s safety requirements and your deadline. The project is set up before anyone opens a tube of mastic, and you hit handover with the evidence already done.
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Step 1
Design support
We sit down with your specifier and architect in the design phase, so the tested detail on the drawings matches what actually gets installed.
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Step 2
Structured kick-off
A structured project kick-off with a pre-start pack: every required document loaded in Onetrace, our compliance platform, before work starts.
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Step 3
Trades coordination
The other trades are coordinated before they build, so nothing goes in that works against proper firestopping.
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Step 4
Change control
An agreed change control process and approval matrix, fixed before work starts. This step gets ignored on most projects, and it is where downstream issues begin.
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Step 5
Live compliance platform
Real-time access to the compliance platform for the entire project. You see every seal, photo and sign-off as the work goes in.
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Step 6
Evidence & handover
Photographed before cover-up and tagged with company, installer and date. The complete Gateway 2 / Golden Thread evidence pack at completion.
Working with leading firestopping manufacturers including Quelfire, Nullifire, Protecta, Rockwool and Firefly
Independent proof, not our word for it
Certification is not a legal requirement. It is the accepted way to demonstrate competence, and it is what separates a certified firestopping contractor from a generalist. These credentials put Skyline in the certified class, audit-ready from PQQ to handover.
The purpose of Skyline is to make the UK much safer … we want every building to be as safe as possible.
Surveys & education
The Intrusion Survey
One intrusive survey at a fixed price for managing agents: concealed voids opened, every breach photographed and priced to fix.
Education, Training & CPD
Free access to every guide and resource we publish, plus an in-person half-day CPD course.
Certified vs Generalist Installer
What third-party certification actually changes at audit, and how to check an installer on the register before you award.
Firestopping, answered
Who needs a firestopping contractor?
Developers, managing agents and commercial landlords with higher-risk buildings: 18 metres or 7 storeys with at least 2 residential units under the Building Safety Act. Skyline serves them across Greater London, the Thames Valley and the M4 corridor.
What does firestopping installation include?
Eleven installation services on one coordinated scope: penetration sealing and penetration firestopping through fire-rated walls and floors, linear gap sealing where a linear gap seal must follow joint movement, cavity barriers and fire barriers on the fire compartmentation line, structural steel protection with intumescent coatings, beam clad systems, fire batts, every fire collar and wrap system, smoke sealing and compartmentation remedial works. Buyers also specify the work as fire-stopping, firestop installation, fire sealing or fire penetration sealing; the tested systems are the same.
How is the work evidenced?
Every penetration, joint and cavity is photographed before, during and after installation, always before cover-up, then tagged and captured in the golden thread as installed. The complete evidence pack is handed over at completion, and records are retained for 15 years.
Get clear advice on your project
Talk to one of our specialists about your building, your programme and what compliance actually requires. It's a free, no-obligation discussion with no commitment, just clear advice from the BM TRADA Q-Mark certified team that installs and evidences the work, with item-level proof per seal on landmark projects including The Gherkin and Olympic Park.