How to Identify a Fire Door

It’s important to know how to identify a fire door, as a fire door is an important element of your building’s passive fire protection system. Certified fire doors carry a rating, such as FD30, indicating 30 minutes of resistance. That rating should match the door’s location. If you’re a building owner, landlord or facilities manager in the UK, a few fast checks will tell you whether a door still does its job.

Quick signs of a certified fire door

Check the edge of the door and the frame for a small label or plate. Manufacturers often fix a metal label or fibre label with the fire rating and certification details. Look for markings that reference standards such as UKCA, CE, or BS EN 1935. If you don’t see a label, treat the door as suspect and test the hardware and gaps instead.

Now you know how to identify a fire door - Are your fire doors safe?

These simple checks could save lives:

Door Furniture

Is the door handle loose or missing?
Are all screws present and tight?
Does the handle operate smoothly and return freely to the horizontal position?
If on an escape route, does the door open in the direction of travel and without the use of a key?

Hinges

Are there at least 3 hinges, with all the screws fitted securely?
Are the hinges free of metal fragments and oil leakage, which could indicate wear?
Are the hinges marked with a UKCA / CE stamp or BS EN 1935?

Note! Make a note of any fire door that is hung on only two hinges.

Locks and Latches

Is the door furniture firmly fixed and working correctly?
Does the latch hold the door firmly in place without rattling?
Does the latch/deadbolt engage fully into the strike plate?
Are there any metal dust deposits on the latch bolt or strike plate?

Door Closers

Does the door fully close and shut tight using its self-closing device?
Open the door to 5˚ or 75mm. Does it close and engage the latch?
Is the closer correctly fitted to the door and frame?
Is the closer free from damage and not leaking oil?
If unlatched, does the closer hold the door aligned with the frame and the intumescent seal?

Hold Open Devices

Is the electromagnetic hold open device operating correctly and releasing the door when the fire alarm is activated?
Make sure that the door hold-open device is not straining the door against its self-closing device.

Signage

Are ‘Fire Door Keep Shut’ (or closed) signs fitted to both sides of the door?
Are ‘Automatic Fire Door Keep Clear’ signs fitted to all fire doors with hold open devices linked to the fire alarm system?
Are ‘Fire Door Keep Locked’ signs fitted to doors without self-closing devices such as cleaner’s cupboards, storerooms and service ducts?

Exit Devices

Is the panic or emergency exit device functioning correctly?
Are all exits free from ties or restrictions of escape?
Are the fixings of the operating device, bolts and strikes tight?

Door Seals

Are the intumescent and/or smoke seals in good condition, intact and undamaged?
Are the seals continuous around the frame or door leaf?
Are the seals well attached inside the groove in the frame or door leaf?

What To Do if a Fire Door Fails Inspection

If you find missing labels, loose hardware, damaged seals or malfunctioning closers, tag the door and schedule repairs. Don’t cover gaps or paint over hardware to hide faults. Use a competent contractor familiar with UK fire-door standards and keep a record of any repairs and certificates.

A Checklist for Inspections

Label present and readable
Minimum three hinges, screws intact
Latch/deadbolt engages fully
Closer closes and latches from 5 degrees
Hold-open releases on alarm
Intumescent and smoke seals continuous
Correct signage fitted

Fire door safety requires correct selection, competent installation and ongoing maintenance. Clear responsibilities and up-to-date risk assessments (aligned with the Fire Safety Act 2021 and the Building Safety Act 2022, where applicable) are essential to keep occupants safe and to comply with the law.

From fire door closers and hold-open devices to hinges and exit devices, your fire door hardware should be tested and certified. Still in doubt, or in need of replacement hardware? Call us today on 0330 8080 617.

If you’re a specifier, installer or responsible for maintaining a fire door, it’s also important that you can select and fit the correct fire door hardware with the necessary level of competence. Our state-of-the-art fire door training centre offers the accredited training courses and regulated qualifications you and your team need to feel confident and remain compliant. Contact fdm.info@allegion.com and upskill your workforce today.

Don’t miss #FireDoorSafetyWeek 2026 - 21–25 September.

Frequently Asked Questions

How can I tell if a door is a fire door? Look for a certification label or plate on the door or frame showing an FD rating, and check for fire-rated hardware, three hinges, a working closer, and intact intumescent seals.

What does FD30 mean? FD30 means the door and its components provide 30 minutes of fire resistance under test conditions.

Are fire door hinges different? Yes. Fire door hinges are heavy-duty, usually three per door, and often marked with UKCA, CE, or BS EN 1935.

Can I paint over a fire door label? No. Painting over labels or seals can hide defects and may void the certification. Keep labels visible and intact.

Who should repair a faulty fire door? Use a competent contractor experienced in UK fire-door standards and keep records of inspections and repairs.