Fire Door Self-Closers: When They Are Required, EN 1154 Power Sizes and How to Keep Them Working

Do fire doors need self-closers?

A fire door only works when it is closed, and a self-closing device is what returns it to the closed position every time someone passes through. Whether a particular fire door must have one depends on what the door is protecting and what your fire risk assessment or building design says — but for most fire doors that people use day to day, the answer is yes.

• Flat entrance doors in blocks of flats need an effective self-closing device, so the door closes behind an escaping resident and protects the communal escape route.
• Fire doors in communal areas of residential buildings — corridor doors, stair doors, doors to plant rooms in regular use — are expected to self-close so compartmentation is never left to chance.
• HMO doors on escape routes: Leeds City Council's fire safety principles, which follow the national LACORS guidance, call for self-closing devices complying with BS EN 1154 on entrance doors to flats and bedsits, and on fire doors to risk rooms in higher-risk shared houses. See our HMO fire door guide.
• Non-domestic buildings: offices, shops, schools and care settings rely on the fire risk assessment. In practice, fire doors on escape routes and compartment lines in occupied buildings are fitted with closers — a door that depends on people remembering to shut it is not a reliable precaution.

The main exception is fire doors that are kept locked shut rather than self-closed — typically cupboards, service risers and plant spaces that people rarely enter. They should never be left standing open; that is why their signage reads 'Fire door — keep locked shut' rather than 'keep shut'.

What do fire door closer regulations actually say?

There is no single 'self-closer law'. Several instruments work together, and the common thread is that once a self-closing device is part of the building's fire precautions, keeping it working is a legal obligation, not a maintenance preference.

Article 17 is the workhorse. Because the self-closer is a device provided 'in connection with general fire precautions', the responsible person must maintain it — so a disconnected or missing closer is an enforcement matter, not a snag. Regulation 10 then fixes how often that maintenance system must look at doors in taller residential buildings, covered in depth in our Regulation 10 guide.

EN 1154 power sizes: which closer does a fire door need?

BS EN 1154 is the product standard for controlled door closing devices — closers that both close the door and control its swing. It classifies every closer with a six-digit code covering category of use, test cycles, power size, fire behaviour, safety and corrosion resistance. Two digits matter most when specifying for fire doors: digit 3 (power size) and digit 4 (fire behaviour), per the DHF best practice guide to BS EN 1154.

The DHF guide is explicit: because of their low closing moments, size 1 and 2 closers are not considered suitable for fire or smoke doors, and adjustable closers used on fire doors must be capable of adjustment to at least power size 3. Fire door leaves are heavier than standard doors, and the closer also has to overcome intumescent and smoke seals and a latch, so under-sizing is a common cause of doors that stop short of the frame. For unusually tall, heavy or draught-exposed doors, go up a size.

Fire behaviour grade and CE/UKCA marking

Digit 4 of the classification is the fire behaviour grade: grade 0 means not suitable for fire or smoke door assemblies, grade 1 means suitable subject to the closer's contribution being assessed as part of a fire-tested door assembly (see our guide to fire door testing standards). BS EN 1154 is a harmonised product standard, so closers sold for fire doors must carry conformity marking — CE, or UKCA in Great Britain — backed by a notified or approved certification body, with the six-digit classification code marked on the product. The standard also requires that a fire door closer cannot have its closing action inhibited without a tool, and must not include any hold-open function unless it is an electrically powered device to BS EN 1155.

How should a fire door closer be adjusted?

Most surface-mounted closers have two adjustment valves, and getting them right is the difference between a door that protects the compartment and one that sits ajar on its smoke seals.

• Closing speed controls the main swing from open towards the frame. Too fast and the door slams, endangering fingers and hammering the frame; too slow and the door may hang open in draughts.
• Latching action controls the final few degrees of travel. It needs enough energy to compress the smoke seals and throw the latch home, so the door finishes flush in its rebate.
• Backcheck, where fitted, cushions the door if it is flung open — recommended by the DHF where abuse is likely or the opening angle is limited.
• Delayed action, where fitted, holds the closing swing briefly to help people who move slowly. On a fire door, BS EN 1154 requires any delayed action to be adjustable to under 25 seconds between 120 degrees and the end of the delay zone.

The functional test in the government's fire door guidance is simple: open the door fully and release it, then open it to about 15 degrees and release it. In both cases the door should close fully into the frame, overcoming any latch or friction. A door that needs a helpful shove for the last inch fails — in a fire, nobody will be there to shove it. Our fire door inspection checklist includes both tests.

Can fire doors be held open legally? Hold-open devices and free-swing closers

Sometimes there is a genuine need for a fire door to stand open — busy corridors, accessibility, or care settings where a heavy self-closing door is a barrier to residents. The lawful answer is never a wedge; it is a device that holds or frees the door in normal use and closes it automatically when the fire alarm operates.

• Electromagnetic hold-open devices to BS EN 1155 hold the door open against its closer and release it when the fire detection and alarm system triggers or power fails, letting the closer shut the door. BS EN 1155 covers these electrically powered hold-open devices, and BS EN 1154 only permits a hold-open function on a fire door closer when it complies with it.
• Free-swing closers leave the door swinging freely like an ordinary door in normal use, then restore full closing control on alarm actuation. They are widely used on bedroom doors in care homes and for dementia care, where residents may struggle with a standard closer's resistance.
• Alarm-linked door retainers at floor or wall level work on the same release-on-alarm principle.

When checking a door held on a magnet, the government's guidance says to use the test button where provided to release it, rather than dragging the door off its magnet, then confirm the closer shuts the door fully. Hold-open and free-swing devices only make sense where a fire detection and alarm system can trigger them; without one, the door must simply self-close.

Why is wedging a fire door open illegal in practice?

No statute contains the words 'door wedges are banned'. But wedging a fire door open defeats a device the law requires to be kept 'in efficient working order' under Article 17 of the Fire Safety Order, and it undermines the compartmentation on which the whole fire strategy depends. That is why fire and rescue services treat wedged fire doors as a breach: the London Fire Brigade lists doors wedged open among the most common fire risks it finds in care homes, 'giving the potential for fire spread throughout the building'.

For the responsible person, a wedged door found during an audit or after a fire is evidence the management system failed. The GOV.UK Regulation 10 fact sheet requires residents of multi-occupied residential buildings to be told that fire doors should be kept shut when not in use, that self-closing devices must not be tampered with, and that faults should be reported immediately. If a door keeps getting wedged, treat it as a design problem with a lawful solution — an EN 1155 hold-open or free-swing device — rather than a behaviour problem to be tolerated.

What does Regulation 10 require for self-closer checks in over-11m buildings?

In England, Regulation 10 of the Fire Safety (England) Regulations 2022 applies to multi-occupied residential buildings over 11 metres. The responsible person must check fire doors in communal areas at least every 3 months, and use best endeavours to check flat entrance doors at least every 12 months. Regulation 10(7) states that both checks must include ensuring that the self-closing devices for the doors are working — a direct response to the missing and broken self-closers identified after the Grenfell Tower fire.

A compliant self-closer check means operating the door, not just looking at it: open fully and release, open to about 15 degrees and release, and confirm full closure into the frame both times. Record the result, and where a flat entrance door cannot be accessed, record the attempts. Our Regulation 10 guide covers the full duty, and the fire door compliance checker will tell you which check regime applies to your building.

Fire door closer troubleshooting

Any repair or replacement should preserve the doorset's certification: use a closer whose EN 1154 classification shows fire behaviour grade 1, fit it to the manufacturer's template, and never introduce a new closer type that the doorset's evidence does not cover. If in doubt about who should do the work, see who can install fire doors.