Can You Prop Open a Fire Door? The Rules on Wedges and Hold-Open Devices

Can you prop open a fire door?

No. A fire door is engineered to do one job — hold back fire, heat and smoke long enough for people to escape and for the fire service to respond — and it can only do that job when it is shut against its frame with its intumescent and smoke seals engaged. Propping, wedging, hooking or chocking a fire door open removes the very barrier it exists to provide. The government's fire door guidance puts the principle plainly: a fire door 'that does not close fully into its frame will not adequately hold back fire and smoke'. A door held open by a wedge is, for fire-safety purposes, no door at all.

This is not the same as passing through a fire door and letting it close behind you — that is exactly how a self-closing fire door is meant to be used. The problem is keeping the door open: holding it back so it cannot close when it needs to. That is what a wedge, a hook, a fire extinguisher stood against the leaf, a bin, a length of rope, or a hand-tightened chain all do, and it is what the rules prohibit.

The legal backing depends on the building. In workplaces and other non-domestic premises in England and Wales, the Regulatory Reform (Fire Safety) Order 2005 (the Fire Safety Order) requires the responsible person to keep fire doors maintained and effective. In multi-occupied residential buildings in England, Regulation 10 of the Fire Safety (England) Regulations 2022 adds specific duties to check communal and flat entrance fire doors and to tell residents to keep them shut. Neither regime permits a fire door to be casually propped open.

Why is wedging or propping a fire door open illegal?

A fire door is not just a piece of joinery — in law it is a fire-safety facility. Article 17 of the Fire Safety Order requires the responsible person to ensure that the premises and 'any facilities, equipment and devices' provided for fire safety are 'subject to a suitable system of maintenance and are maintained in an efficient state, in efficient working order and in good repair'. A fire door and its self-closer are precisely such devices. Wedging the door open deliberately disables that device, so a propped fire door is a straightforward failure to keep fire-safety equipment in efficient working order.

It is also one of the failings enforcers see most often. The government's fire safety risk assessment guide for offices and shops singles out 'poorly maintained and damaged fire doors or fire doors being wedged open' as problems it repeatedly identifies, and asks that staff understand 'the importance of keeping fire doors closed to prevent the spread of fire, heat and smoke'. Because a wedge is quick, cheap and visible, it is one of the first things a fire officer notices on an inspection — and one of the easiest breaches to prove.

The consequences are real. A fire and rescue authority can serve an enforcement notice requiring the failing to be put right, and, where people are at serious risk, a prohibition notice restricting or stopping use of part of the premises. Where a failure to comply with the fire-safety duties 'places one or more relevant persons at risk of death or serious injury in case of fire', it is a criminal offence under the Order. Habitually wedging fire doors on an escape route is exactly the kind of management failure that can sit behind such action.

What counts as illegally propping a door open?

It is the effect that matters, not the object. Anything that stops a fire door closing on demand is a problem, including:

• A wedge — plastic, rubber, wooden or a folded-up beer mat — under the leaf.
• A hook, chain, bolt or cabin hook holding the door back against a wall.
• A fire extinguisher, bin, box or chair placed against the leaf to keep it open.
• Tying, propping or disconnecting the self-closer, or removing the closer arm so the door no longer shuts.
• Over-tight carpet, packaging or stored goods left in the swing so the door cannot fully close and latch.

None of these can release the door when a fire starts, so all of them defeat it. The lawful alternative is never a 'better wedge' — it is a device designed to hold the door open and then let it close automatically on the alarm.

How can you legally hold a fire door open?

There are entirely legitimate reasons to want a fire door held open — heavy foot traffic through a corridor, trolleys and beds in a care setting, accessibility for wheelchair users, or simply a busy through-route. The compliant answer is a controlled hold-open or free-swing device that keeps the door open under normal conditions but releases it to self-close the moment the fire alarm operates. Three categories are commonly used, and all of them are acceptable in principle; the right choice depends on the door, the building and its fire-detection system. We do not endorse any particular product — what matters is the category and that the device fails safe.

Electromagnetic hold-open devices (BS EN 1155)

An electromagnetic — or 'mag' — hold-open device uses an electromagnet wired into the building's fire alarm to hold the door open against its closer. When the alarm activates, or if power is lost for any reason, the magnet de-energises and releases the door, which then closes under its own self-closer. These devices are covered by BS EN 1155, the standard for electrically powered hold-open devices for swing doors; a key requirement is that interruption of the electrical supply causes the controlled door to close positively. Because they are wired to the fire detection and alarm system, they release across the whole building the instant the system operates.

Free-swing door closers

A free-swing closer lets the door move freely, as if no closer were fitted, so it can be left open at any angle or swung by hand without resistance. On a fire alarm signal or a loss of power, it reverts to acting as a normal controlled closer and shuts the door. Free-swing closers combine the closing behaviour defined for controlled door closing devices under BS EN 1154 with the fail-safe hold-open behaviour of BS EN 1155. They are often chosen where users need to move a door repeatedly but it must still self-close in a fire — common in care and healthcare settings.

Sound-activated (acoustic) release units

A sound-activated release unit is a battery-powered retainer, usually floor-standing, that holds the leaf open at a chosen angle and 'listens' for the building's fire alarm. When it detects the alarm, it releases the door so the overhead closer can shut it. Because these units are self-contained and need no wiring to the alarm panel, they are a practical retrofit where hard-wiring a magnet is difficult — but they only work correctly if the door still has a functioning self-closer and the alarm is loud enough at the door to trigger release. They are a category of product, not a single brand, and must be selected and maintained so they reliably release on alarm.

What makes a hold-open device compliant?

The single test that decides whether a hold-open arrangement is lawful is whether it fails safe — whether the door closes fully the instant it needs to, without anyone doing anything. A compliant device answers 'yes' to all of the following:

• It releases the door on the fire alarm, promptly and reliably, so the door begins to close as soon as the alarm operates.
• It releases on loss of power — a wired device must let the door close if the electrical supply fails, and a battery device must be maintained so its battery cannot silently die.
• Once released, the door closes fully into its frame and latches under its own self-closer, with seals engaging as designed.
• It is appropriate for the door's role — some doors, such as certain flat entrance and stair doors, may not be suitable for holding open at all; the fire risk assessment decides.
• It is maintained and tested as part of the building's fire-safety regime, so it is proven to still release on demand.
• The held-open door carries the correct signage so nothing is stacked in its closing path.

Signage matters here. A self-closing fire door that is meant to stay shut carries a 'Fire door keep shut' sign, but a door legitimately held open by an automatic device should carry an 'Automatic fire door keep clear' notice — telling people not to obstruct the swing or defeat the closer. Safety signs of this kind are required where a residual risk remains under the Health and Safety (Safety Signs and Signals) Regulations 1996. Our fire door signage guide sets out which notice belongs on which door.

Communal or private: who can hold a fire door open, and who must be told?

The rules bite hardest on communal fire doors — the doors on shared corridors, lobbies and stairs in blocks of flats, HMOs and mixed-use buildings, which protect the escape routes everyone relies on. In England these are squarely within Regulation 10 of the Fire Safety (England) Regulations 2022. In buildings above 11 metres in height, the responsible person must check communal fire doors at least every three months, and must use best endeavours to check flat entrance fire doors at least every twelve months. A wedged communal fire door is both an obvious breach and a direct danger to every household above it. Our guide to Regulation 10 fire door checks explains which doors fall inside the regime.

Regulation 10 also creates an information duty, and this one is not limited to tall buildings — it applies to the responsible person of any building containing two or more sets of domestic premises with common parts. They must give residents information that fire doors should be kept shut when not in use, that residents and their guests should not tamper with self-closing devices, and that faults or damage to fire doors should be reported to the responsible person straight away. This information must reach new residents as soon as reasonably practicable and be repeated to all residents at least every twelve months. In other words, in shared housing the law expects everyone — not just the manager — to be told why the door must stay closed.

Flat entrance doors sit on the boundary between communal and private. The door itself is a fire door protecting the shared escape route, so residents are asked not to prop it open or disable its closer, even though the flat behind it is private. Our guide to flat entrance fire doors covers this in detail. Inside a single private dwelling — a house occupied by one household — the Fire Safety Order does not impose duties on the occupier for their own home, so no one will serve an enforcement notice because you left an internal fire door open. But those doors were still fitted for a reason under the Building Regulations, and keeping them shut, especially at night, remains sound fire-safety practice.

What should you do instead of propping a fire door?

If a fire door is being wedged open, that is a signal that the door is inconvenient in its current form — and the answer is to fix the inconvenience compliantly, not to accept the wedge. The practical options are straightforward:

• Fit an approved hold-open or free-swing device where a door genuinely needs to stand open — an electromagnetic hold-open to BS EN 1155, a free-swing closer, or a sound-activated release unit, each of which lets the door close on the alarm.
• Adjust or replace the self-closer if the door is being wedged because it slams, drags on the carpet or is too heavy to use comfortably — the fault is the closer, not the need to keep the door shut.
• Remove the reason for propping — reorganise deliveries, trolleys or ventilation so the door does not have to be held open at all.
• Never disconnect, tie back or unscrew a closer. A door with a defeated closer is a fire door that no longer works.
• Report and record wedged doors when you find them, and put dated evidence of the fix in your fire-safety records.

Behaviour is half the battle. In workplaces, the person who controls the premises is the responsible person and must make sure staff understand why fire doors stay closed and know not to defeat them — the offices and shops guide asks for exactly this. In shared housing, the Regulation 10 information duty does the same job for residents. A door that is easy to use and a workforce that understands the risk together remove most of the temptation to reach for a wedge.

As a pre-launch knowledge base, we set out the standards rather than inspect or certify any building — but the message is simple and universal: identify which doors are fire doors, keep them closed or held open only by a device that releases on the alarm, and keep dated evidence that the arrangement actually works. For the wider legal picture, see are fire doors a legal requirement and the overview of UK fire door regulations.