How to spot a fake fire door.

The 5-minute checklist

This is the exact sequence we run on every fire-door survey. You can do it yourself before booking a professional inspection — it tells you whether you have a problem or whether the doors are probably fine.

1. Look for the certification plug or label (30 seconds)

Every certified fire door has a manufacturer marking. Look on the top edge of the door — open the door wide, get a step, look at the very top edge of the leaf. You're looking for either:

• A small coloured plug, usually 12mm diameter, sometimes with a label inside it. The plug colour can vary by manufacturer.
• A printed label or stamp giving the manufacturer name, the FD rating (FD30 / FD30S / FD60), and a test certification reference.

If there's nothing on the top edge — no plug, no label, no stamp — the door is almost certainly not certified. Move to the next checks but flag this one.

2. Check the door's weight and feel (30 seconds)

A genuine FD30S door is around 32kg. FD60 is around 52kg. Push the door — does it feel substantial when it swings? Lift it (don't actually unscrew it, just feel how it hangs). Light, hollow-feeling doors that swing too easily are almost never fire-rated, even if the surface looks solid.

3. Look at the door edges for an intumescent groove (60 seconds)

Open the door and look at the edge — the side and top edges that face the frame. Genuine FD30S doors have a groove cut into the edge to hold an intumescent strip. The strip might be white, grey, or a coloured intumescent material; sometimes it's combined with a brush smoke seal. You should see this groove on all three frame-facing edges.

No groove = no strip = not a fire door, even if the leaf is thick.

4. Check the hinges (60 seconds)

A certified fire door must have three CE/UKCA-marked fire-rated hinges. Look at the hinge edge of the door:

• Three hinges, not two. Two-hinge doors are not compliant fire doors regardless of the leaf rating.
• CE or UKCA marking stamped into the hinge knuckle. If the hinges are old brass with no markings, they're not fire-rated.
• Even spacing — top hinge near top, middle hinge at 1/3 height from bottom, bottom hinge near bottom.

5. Test the closer (60 seconds)

Every fire door on a shared escape route needs a self-closing device. Open the door fully (130° or so) and release it. The door should close fully and latch within 5-7 seconds without sticking, without slamming, and without you needing to push.

• No closer = not compliant.
• Closer disabled (you can see it but the arm is unscrewed) = not compliant — and disabling a closer is itself a Fire Safety Order offence.
• Closer present but doesn't latch the door = needs adjustment or replacement.

Bonus check: gap measurements (60 seconds)

Open the door, then close it just enough that you can slide a piece of paper or a credit card into the gap. The gap between door edge and frame should be:

• Sides and top: 2–4mm. Wider than 4mm and the seal can't expand enough during a fire.
• Bottom: maximum 8mm to floor. Bigger than this and smoke passes underneath.

The four most common "fake fire door" patterns we find in London

Pattern 1 — solid timber doors mistaken for fire doors

Pre-1990s London terraces often had genuinely solid hardwood internal doors. They look heavy, sound heavy, and decorators routinely tell landlords "these are fire doors". They're not. Without test certification, a solid timber door is a solid timber door, not a fire door.

Pattern 2 — fire doors stripped of certification during refurb

A certified door comes from the factory with a plug on the top edge. Refurbs sometimes plane the top edge to fit awkward openings, removing the plug. Same physical door, same rating — but with no traceable certification visible on the door, councils may reject it. The certificate paperwork from the manufacturer can rescue this, but most landlords don't have it.

Pattern 3 — "fire-rated look" replicas

The market has imported "fire-rated" doors from suppliers without proper UK certification — visually identical to BWF-Certifire FD30S doors, plugged and labelled, but the actual test data doesn't exist or isn't UK-applicable. Rare but not unheard of. If the manufacturer name on the plug isn't a name a search engine recognises (Door-Stop, Vicaima, Premdor, JB Kind, XL Joinery, etc.), assume the worst until proven otherwise.

Pattern 4 — certified doors with non-certified ironmongery

A correctly certified FD30S door with brass non-rated hinges, a non-rated letter plate, or a non-rated latch is no longer a compliant fire door. The certification covers the assembly tested, and substituting non-rated components invalidates it. We see this constantly on flat-entrance doors with original brass letter plates.

What to do if you find a fake fire door

1. Don't panic, but don't ignore it. Compliance can be restored quickly with the right plan.
2. Book a survey — we provide a written report listing what's compliant, what needs replacement and what needs repair. £140–£260 for a typical HMO.
3. Plan the remediation — fixed price quote, trade invoice for the doors shown separately from the fitting fee. See fire door replacement London.
4. Document everything — manufacturer certificate, installation record, photos. The pack is what closes the compliance loop.
5. Start the quarterly inspection log from the day the new doors are signed off. Template provided.

What real certified fire-door brands look like

UK fire-door manufacturers you'll commonly see on certified products: Door-Stop, Vicaima, Premdor, JB Kind, XL Joinery, LPD Doors, Deanta, Mendes. Certification bodies: BWF-Certifire, BM TRADA Q-Mark, Warringtonfire. If the plug or label has a manufacturer name that doesn't match this list and isn't easily searchable, treat with caution.

Council acceptance and the documentation pack

London councils have tightened in 2025/26 — even genuinely certified doors get rejected if the documentation pack is missing. The pack we deliver with every Doorz London installation: manufacturer certificate, installation record, photographs of each door, ironmongery list, first quarterly inspection record. That's what closes the loop. See fire door compliance London for the full documentation framework.