The certificate on the wall says nothing until you read its scope
A contractor arrives to quote for fire stopping works and hands you a glossy certificate with a recognisable logo on it. You file it, feel reassured, and appoint them. Six months later a regulator asks how you satisfied yourself the contractor was competent, and you realise you never actually read what the certificate covered. It turns out it was for fire door installation, not penetration sealing — the very work you paid for.
That gap is where duty-holders get caught out. Not because they ignored competence, but because they treated a certificate as a single pass-or-fail badge rather than a document with defined limits. Understanding the difference is part of your job now, and it is more straightforward than it sounds.
Three things that all get called "competence"
When a contractor tells you they are competent, they usually mean one of three quite different things.
The first is self-declared competence. The contractor says they know what they are doing. They may well be excellent. But there is no independent check, no external assessor, and nothing stopping anyone else making the same claim. From your position as the person who has to justify the appointment later, a self-declaration carries almost no evidential weight.
The second is trade body membership. Belonging to an industry association is a reasonable signal — it usually means the firm has met some entry criteria and signed up to a code of conduct. But membership is not the same as having your actual work inspected. Some schemes verify very little beyond payment of a subscription. You cannot assume, from membership alone, that anyone has watched this contractor install a fire damper correctly.
The third is independent third-party certification with ongoing audit. This is the one that does the work for you. A certification body assesses the contractor against a defined standard, then keeps checking through surveillance visits and site audits after the certificate is issued. It is not a one-off exam. The certificate can be suspended or withdrawn if standards slip. That continuing scrutiny is exactly what makes it defensible when someone asks how you chose.
What a certification body actually does
A certification body is not simply issuing paperwork. It assesses the contractor's technical capability, quality management, and installation practice against a published scheme. It then returns — visiting sites, examining completed work, sampling records — to confirm the standard is being maintained in the real world rather than just at the point of application.
Crucially, every certificate has a scope. The scope defines precisely what the certification covers: which activities, which products or systems, sometimes which methods. A firm certified for fire door installation is not automatically certified for compartmentation or fire damper testing. A firm certified to install one manufacturer's fire stopping system may not be certified for another's.
So the existence of a certificate answers one question — has this contractor been independently assessed? The scope answers the question that actually protects you — assessed for what? A certificate is only relevant if its scope matches the work you are commissioning. This is the single most common thing duty-holders miss.
Why this connects to your own legal position
The Building Safety Act 2022 raised the expectation that those working on and managing buildings are competent, and that duty-holders take reasonable steps to appoint competent people [VERIFY]. The Act does not hand you a checklist that guarantees compliance. What it does is put the onus on you to make — and be able to evidence — a reasonable choice.
Appointing a contractor with relevant, in-scope third-party certification is one of the clearest ways to demonstrate you did that. You are not relying on your own judgement of technical ability you do not possess. You are relying on an independent body whose entire function is to make that assessment and keep making it. If challenged, you can point to the scheme, the scope, and the audit trail behind it.
What to ask before you appoint
You do not need to be a fire engineer to have this conversation. Four questions get you most of the way:
- Which scheme are you certified under? You want an independent, third-party certification scheme with ongoing surveillance, not a membership badge.
- What is the scope of your certification? Ask them to confirm it covers the specific work you are commissioning — fire stopping, damper testing, fire door installation, and so on. Get it in writing.
- What is your certificate number? This lets you verify the certificate directly with the certification body rather than taking the contractor's word for it.
- When were you last audited or surveilled? A current, active certificate should have a recent history of scheme visits behind it.
Keep the answers. They form part of the record that shows you took reasonable steps — the same record a regulator, insurer or incoming duty-holder may one day want to see.
Where we sit
Premier Compliance holds third-party certification through BM Trada, BESA and IFC across our passive fire protection work, and we are happy to confirm the scope of that certification against whatever work you are considering. That is the point of certification: it should let you verify, not just trust.
If you are unsure whether the contractors you already use hold relevant, in-scope certification — or whether the work you have commissioned falls within it — that is worth resolving before the next audit rather than during it. Start with your fire damper testing and wider passive fire protection records and check the scope on file against the work actually carried out.