Guide · updated 9 October 2026
Fire door closers: a practical guide
Short answer: A fire door closer must close the door fully and engage the latch from any opening position. Overhead closers are the most common; concealed closers need specific test evidence; free-swing closers suit people who struggle with door weight. Most closing faults are fixed by adjustment.
- Must close and latch from any angle
- Closers tested to BS EN 1154
- Concealed closers need specific evidence
- Free-swing helps vulnerable users
What does a fire door closer have to do?
A fire door closer must return the door from any opening position to fully closed with the latch engaged, without the user having to push it. A fire door that stops a few millimetres short provides very little protection.
What types of closer are there?
- Overhead closers: surface-mounted with an arm, the most common type.
- Concealed closers: hidden in the leaf or frame; neat, but they need test evidence for the specific door.
- Floor springs: set into the floor, often on heavy or double-swing doors.
- Free-swing closers: let the door move freely, then close it on fire alarm activation.
Why won't my fire door close properly?
Usually because the closer is set too weak, the latch is misaligned with the keep, hinges have dropped, a seal is binding, or new flooring is catching the door. Adjusting the closer alone can hide the real cause.
What about doors that slam?
A slamming door is a closer fault too. The closing speed and latching speed can usually be adjusted, which protects the frame, hinges and the people using the door.
When should a closer be replaced?
When it leaks oil, will not hold adjustment, is physically damaged, or is the wrong power size for the door. Replacement closers should be tested to BS EN 1154 and suitable for the door's size and weight.
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Related questions
Why won't my fire door close properly?
Common causes are a closer set too weak, a latch out of line with the keep, dropped hinges, a seal binding at the edge, or flooring that has raised the threshold. We find the cause before adjusting the closer.
Can fire doors be held open?
Only with a device designed to release the door automatically when the fire alarm sounds, such as an acoustic or alarm-linked electromagnetic hold-open. Wedges and hooks are not acceptable on fire doors.
Is it legal to wedge a fire door open?
Wedging a fire door open defeats it, because it cannot close in a fire, and it can breach fire safety law. If a door needs to stay open, use a device that releases it automatically when the alarm activates.
Do acoustic hold-open devices work with any alarm?
They listen for the alarm sounder, so the sounder must be loud enough at the door. We check the sound level and the alarm type before recommending one.
Sources checked 9 October 2026: GOV.UK Fire Safety (England) Regulations 2022 fact sheets; BSI and FPA announcements on BS 8214:2026; FDIS published inspection data. This guide is general information, not legal advice.
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