Third-party accreditation is the difference between firestopping you can prove and firestopping you have to argue for. Without it, the burden of proof lands on you: at tender, at Gateway 2, and whenever a stop notice asks you to defend work that's already behind the wall. A compartmentation survey is the quickest way to find out where you stand.
What independent certification gets you: an audited package scope, installation traceable to tested systems, and less evidentiary burden landing on you later
Landmark London projects: The Gherkin, Olympic Park and Grosvenor Square
Third-party accreditation means an independent certification body audits an installer against the tested systems it installs and lists the company on a public register. A BM TRADA Q-Mark certified firestopping installer carries that audit; a generalist does not. The practical difference is who can prove the work was done correctly.
Watch: the mistakes an audited installer is checked against. Expanding foam passed off as firestopping, missing installation tags, and signage that does not match the tested system.
The worst things I see all the time when it comes to fire-stopping is pink foam. Like, people love spraying, expanding pink foam into any gap and then thinking that it's fire-stopping. Like, it is not. If anyone tells you that it is, they are wrong. Another really common one is no tags. Proper fire-stopping installation should have tags. It should be real clear, like, you know, it's got the company's name, who installed it, the date it was installed, all of that information. If you don't have that, then you can't guarantee that you've got fire-stopping. Another really common one is just random mastic or insulation stuffed into gaps and calling it fire-stopping. It's not fire-stopping. And one more one is this. When it comes to fire doors, just because it's got FD30 or FD60 on it or a sign that says fire door doesn't make it a fire door. Fire door or fire-stopping is a system and there are loads of things that make it correct. If one of those things is out of place, the system's incomplete. So just because it's signed as such doesn't mean it's actually that. If you've got something like that in your building or you're not sure, then the best thing to do is to get in touch with us. You can email us, go to our website. Information will be below.
The difference is independent audit. A BM TRADA Q-Mark certified installer is accredited and inspected against the systems it installs, then listed on a register you can search. A generalist may do sound work, but nothing independent proves it, so the burden of proof moves to the building owner. The criteria below are the ones that decide a tender and a Gateway 2 submission.
| Criterion | Third-party certified (BM TRADA Q-Mark) | Generalist installer |
|---|---|---|
| Installation independently audited An outside body checks the work, so competence is not self-declared. | Yes | No |
| Listed on a public certification register You can confirm the status yourself before you award. | Yes | No |
| Evidences installer competence for Gateway 2 Independent audit evidence, not automatic Gateway 2 acceptance. The dutyholder still makes the submission. | Yes | At risk |
| Traceable to accredited test evidence Each seal maps back to a test, never to a site decision. | Yes | Often not |
| Scope audited to the work performed The certificate covers the package you are actually buying. | Yes | Varies |
Q-Mark is BM TRADA's third-party accredited Fire Stopping Installation Scheme: it certifies that a contractor installs firestopping products at penetration points through a building's fire compartments in accordance with the manufacturer's instructions. BM TRADA, the third-party accreditation body, assesses the contractor rather than the product. The scheme works through a responsible individual who carries accountability for the training and the work of a team of operatives, and BM TRADA publishes each certified company on a register.
That structure matters to a buyer for one reason. Competence stops being a claim on a letterhead and becomes a status an outside body has tested and continues to hold. The Building Regulations and the Regulatory Reform (Fire Safety) Order both require the person fitting firestopping to be competent, and third-party certification is the accepted means of demonstrating it. Skyline holds BM TRADA certification (Q-Mark): the Q-Mark Fire Stopping Installation Scheme. Other third-party schemes buyers compare — FIRAS certification, IFCC — and the Association for Specialist Fire Protection (ASFP) membership route all rest on the same principle: an independent body audits the installer against the systems it installs.
Read the scope, not the logo. A certificate can be genuine and still exclude the work in your package. If the scope does not name what you are buying, it is not evidence for it.
You check it yourself, in four steps, without asking the contractor for anything. The register is public. That is the whole point of third-party certification, and it is the one claim on a tender return a buyer can settle without waiting on the contractor.
Gateway 2 is the point before construction of a higher-risk building can start, where the Building Safety Regulator checks that the design meets the building regulations. Firestopping and compartmentation evidence forms part of the case that has to satisfy it. Certification does not pass Gateway 2 by itself. The dutyholder still has to make the submission. What it changes is the competence question inside that case: where the installer is certified, competence is backed by independent audit evidence instead of a self-declared claim. Where the installer is not, the dutyholder has to build that competence argument another way — and at Gateway 3, when the as-built record is checked, the work is already behind a wall.
The same gap reappears later. An RFI, a stop notice or a compliance notice asks the owner to produce proof on demand. Certification does not remove that duty. It supplies independent evidence to answer that duty with, which is why prequalification questionnaires ask for certification long before any regulator does. If your own records cannot answer that duty today, an Intrusion Survey establishes the current position floor by floor before the question is asked.
It leaves a record. 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 label in the photograph is the difference. It is what turns a finished seal into something a regulator can trace back to a tested system.
Six checks you can apply to any firestopping contractor, including this one. Each is answerable from public sources or from a straight question at tender stage.
Confirm the status on the accreditation body's own register rather than from a logo on a document.
"Which register, under which company name?"Read the certificate scope against your package. A neighbouring discipline is not the same discipline.
"Does the scope name this work?"Ask what the operatives hold and how their competence is assessed, and ask to see the records rather than a summary.
"What do the people on site hold?"A firm answer names systems and their test evidence. A vague answer now is how untested substitution reaches your building later.
"Which tested systems, and whose?"Photography after the wall closes proves nothing. Ask when the record is taken and how each seal is identified.
"When is each seal photographed and tagged?"Establish what you receive at handover and how long the evidence pack is kept.
"What lands at handover, retained how long?"For a higher-risk building, yes. A BM TRADA Q-Mark certified installer has been through third-party accreditation and audit against the tested systems it uses, then listed on a public register. That independent line is what the Building Safety Regulator and warranty providers look for. Without it, the building owner has to prove competence some other way.
It can. The building owner must then prove compliance without an independent audit behind it, which is harder and carries more risk. Third-party-certified installation carries independent competence evidence with it. It does not pass Gateway 2 on its own, but it removes that one argument from the case the dutyholder has to build.
Certification changes what you receive rather than only what you pay. Third-party accredited firestopping carries the audit, the register listing and the evidence capture that make an installation defensible later. A quantity surveyor is comparing a priced package against a package plus the proof it survives scrutiny.
I cannot recommend them highly enough!
Bring us the building and the programme. A compartmentation survey opens the concealed voids, finds every breach and photographs it, and prices the fix — a record your FRA and insurer ask for.
See how a survey works → or call 0330 133 8450Bring us the building and the programme. A compartmentation survey opens the concealed voids, finds and photographs every breach, and prices the fix — carried out by the BM TRADA Q-Mark certified team behind firestopping at The Gherkin and Grosvenor Square.