Firestopping Intrusion Survey. The fire compartmentation survey for the parts of the building you can’t see.
Your FRA flagged the ceilings, risers and voids it could not see into. One intrusive fire compartmentation survey for managing agents — ceilings lifted, riser doors opened, concealed voids inspected — finds every breach, photographs it and prices the fix, with the record your FRA and insurer ask for.
Compartmentation survey types? One survey covers them all: the Intrusion Survey.
One intrusive fire compartmentation survey, scoped to your building. We open up the concealed line: above ceilings, behind riser doors, into the voids a walk-through never reaches. Floor by floor, every breach is photographed, located and classified.
Intrusive, by design
Ceilings lifted, riser doors opened, concealed voids inspected. The breaches that matter hide where a walk-through does not reach, so this survey opens them up. It covers the cavity-barrier checks some call a fire barrier survey.
- Fire-rated walls, floors & ceilings
- Risers, shafts & concealed voids
- Service penetrations & linear gaps
Every breach, logged
Each breach is photographed, located and classified, item by item, into a record you can hand straight to your fire risk assessor. The same discipline we bring to our own installations.
- Location, photograph & severity per breach
- Each seal checked against its tested system
- Captured as surveyed, never reconstructed
A plan to pass
A prioritised remedial plan against every finding, priced to fix.
- Prioritised, priced remedial plan
- Photographed evidence for every fix
- Evidence record ready for your FRA and insurer
One price. No surprises at all.
£5,000 fixed, agreed before work begins
One price, agreed before we start. Quoted and delivered by a BM TRADA Q-Mark certified specialist.
- One fixed price, agreed before any work begins
- Skyline makes sure you pass at that fixed cost
- Records retained for 15 years
If the building doesn’t pass its FRA, you don’t pay for the survey
If the building doesn’t pass its FRA, you don’t pay for the survey. Skyline makes sure you pass at that fixed cost.
Book your Intrusion Survey → or call the team · 0330 133 8450Why buildings get an Intrusion Survey
When a building cannot evidence its ceiling and riser voids. The compartmentation record is incomplete, the fire risk assessment carries actions or limitations, and nobody can evidence the line the building depends on when a fire safety survey, an insurer or an assessor asks for it.
The Intrusion Survey opens the concealed line and turns it into a located, photographed and priced list: what holds, what is breached, and what it takes to close it.
- FRA triggerYour fire risk assessment carries compartmentation actions or intrusive-survey limitations you cannot yet evidence.
- Insurer triggerAn insurer question or a client audit demands documented survey evidence you don’t yet hold.
- Building triggerOther trades have created penetrations. No one can say who owns the breach, or prove it was sealed.
Read the video transcript
Yo, my name's Tom, I'm the director of Skyline Firestopping Ltd and this is Q&A number one. My favourite thing about the job is that there's actually a tangible purpose and we're actually doing something that is going to benefit people greatly. If I've done my job well, I'm saving people's lives. That makes me feel pretty good. The thing that separates Skyline from other businesses is a lot of other companies, they want to tie you up in a lot of different processes and protocols and all this sort of stuff and we're not really interested in that. We want to get on site, we want to have a look and we just want to get going. Speed and responsiveness is kind of our unique selling point. And that is Q&A number one done.
A record, not a promise
A Skyline fire compartmentation surveyor delivers more than a page of prose: a defensible record of penetrations, joints and cavities photographed, located and logged item by item. That is the same discipline we bring to our own installations.
- The survey report Location details, non-conformities, photographs and service penetrations.
- The evidence record Each finding captured into the golden thread as surveyed — never reconstructed afterwards — ready to hand into your building record.
- The remedial plan A prioritised plan for certified rework, closed out in the evidence pack.
Multi-service penetration — assessed
Conforming · evidencedPenetration cluster — breach logged
Non-conformity · remedial recommendedDuctwork penetration — record checked
Conforming · traceableBuilt to survive scrutiny
The survey output is structured for the people who will actually check it: building control, the Building Safety Regulator, insurers and owners. Defensible compliance, not just compliance.
Third-party certified. BM TRADA Q-Mark tested systems, installed exactly as tested and evidenced before cover-up. Independent proof, not our word for it.
Checked against the tested system, seal by seal
Skyline is third-party certified under the
BM TRADA Q-Mark scheme.
BM TRADA Q-Mark certified installer, with experience on The Gherkin, Olympic Park and Grosvenor Square.
Findings you can defend — a survey that answers to the building
Skyline’s Intrusion Survey is an intrusive fire compartmentation survey. Some buyers book the same discipline as a fire survey, a compartmentation survey, or fire safety audits. It walks the building’s fire-resisting line floor by floor, opens up the concealed spaces above ceilings and behind riser doors, and records every breach where services pass through, each with a location, a photograph and a severity. The result is one evidence record: every breach located, photographed and classified, ready for your FRA and insurer.
What access will the survey need?
This is an intrusive survey by design: ceilings are lifted, riser doors opened and concealed voids inspected floor by floor, because the breaches that matter hide where a routine fire inspection or a walk-through never reaches. Access covers fire-rated walls, floors and ceilings, risers, shafts and concealed voids, and service penetrations and linear gaps. Scope and access are agreed with you before work begins, so your team, tenants and contractors know what to expect on site.
What the record contains
Every finding in a Skyline survey carries a location, a photograph and a classification, recorded item by item rather than summarised in a paragraph. The people who check the record — building control, the Building Safety Regulator, insurers and owners — can trace each non-conformity to its evidence and its fix. We assess each seal against the tested system it claims to be, checking annular gaps and installation quality seal by seal against the fire-resistance rating the tested system claims. The rating classes are set out in Approved Document B (Fire Safety). Findings are captured into the golden thread as surveyed, never reconstructed afterwards, and handed over ready to drop straight into your building’s evidence record and its Fire Strategy & Risk Assessment documentation. It is the same standard of record a fire and safety inspection, a firestopping survey or a passive fire protection survey would expect to see — it is what our Firestopping & Compartmentation Surveys produce, carried out by a team holding BM TRADA Q-Mark certification. Because we install and certify firestopping ourselves, the survey applies the same discipline we use on our own work: seen, photographed and logged.
What happens to the findings after the survey?
Every finding becomes a prioritised remedial plan, priced to fix, with photographed evidence for each item. Findings are captured into the golden thread as surveyed, never reconstructed afterwards, with 15-year record retention.
From findings to a defensible fix
Firestopping & Compartmentation
Tested systems, installed exactly as tested. Every seal is evidenced before cover-up.
Remedial Firestopping
Correcting defective or failed firestopping found on survey, put right with certified rework and evidence.
Gateway 3 / BSR Evidence Pack
What the Building Safety Regulator expects in a firestopping evidence pack. How Skyline compiles it.
Book your Intrusion Survey
Tell us about the building and what you need to evidence. BM TRADA Q-Mark certified · experience on The Gherkin, Olympic Park & Grosvenor Square.