Do Riser Cupboard Doors Need to Be Fire Doors?
TL;DR
In most commercial buildings and blocks of flats, yes. A service riser is a shaft running through every floor, and its door is part of the fire protection that stops fire and smoke using it as a chimney.
The door must be fire resisting to the rating set by the building's fire strategy or fire risk assessment, and either kept locked shut or fitted with a self-closer.
Riser doors are easy to forget: they are often left unlocked, propped open by contractors, missing their signs, or have holes drilled through them for cables.
They belong in your fire door inspection programme. Government guidance for higher-rise blocks of flats lists them alongside communal doors for checks at least every three months.
Defects found on a riser door should be logged, repaired by a competent contractor and recorded as closed.
Most facilities managers walk past riser cupboards every day without a second look. They are the plain doors in corridors and lobbies that hide cable trays, pipework and distribution boards. Because nobody uses them as a route, they rarely get the attention a stair door or a corridor door does. That is exactly why they turn up so often as defects on fire door inspections.
Do riser cupboard doors need to be fire doors?
In most cases, yes. A service riser carries cables, pipes and ducts vertically through the building, so it passes through every floor and every fire compartment on its way. If a fire gets into the riser, it can travel up the shaft and reach floors far from where it started. The riser door is one of the things that keeps it out. That makes it a fire door doing a real job, not just a cupboard door. The required rating comes from the building's fire strategy and fire risk assessment, and it usually matches the fire resistance of the riser walls.
Why are riser doors part of the fire protection?
A riser is a hole through the building's floors, and floors are normally where fire compartmentation is strongest. The building keeps that protection by either sealing the riser at each floor with fire stopping, or by enclosing the whole shaft in fire-resisting walls with fire-resisting doors on each level, or a mix of both. Where the shaft is enclosed, a weak or open door on one floor gives fire and smoke a way into the shaft and out on another floor. Our article on fire stopping around electrical cable penetrations covers the sealing side of the same problem.
Do riser doors need to be self-closing or locked?
They need to be one or the other. Government guidance on the Fire Safety (England) Regulations 2022 says doors to plant rooms, service cupboards and risers may be either self-closing or kept locked shut. Most riser doors are kept locked, because nobody needs regular access, and they are normally marked on the outside with a "Fire door keep locked shut" sign. A riser door that is neither locked nor self-closing is a defect, however good the door itself is. For more on closers, see our article on whether fire doors need to be self closing in a commercial building.
What do riser doors commonly fail on?
These are the everyday defects that turn up during fire door inspections on riser cupboards:
Left unlocked or propped open, often after a contractor visit, with a wedge or a cable keeping it ajar.
Missing or wrong signage, such as no "keep locked shut" sign, or a sign painted over.
Holes through the leaf or frame where someone has run a cable or fitted a padlock hasp without sealing round it.
Damaged or painted-over intumescent strips and smoke seals, where present.
Gaps that are too large around the leaf. The government guidance quotes an industry standard of no more than 4mm, apart from the bottom of the door. Our article on fire doors and the gaps around them explains how to check.
A plain cupboard door fitted where a fire door should be, usually after a refurbishment or a replacement nobody checked.
Unsealed penetrations inside the riser, where new services went through the floor or wall and the fire stopping was not made good.
Any of these can be put right through fire door remedials, but only if someone finds them first.
How do you know if a riser door is a fire door?
Look for the evidence a fire door normally carries: a label or plug on the top or hinge edge of the leaf showing its certification, intumescent strips or smoke seals around the edge, and at least three hinges. A light, hollow-sounding leaf with no markings, or a flush panel held by magnets or clips, is often not a fire door at all. If you are not sure, a competent fire door inspection will confirm it. Our article on how you know if a door is a fire door goes through the signs in more detail.
How often should riser doors be checked?
For blocks of flats with a top storey above 11m, the Fire Safety (England) Regulations 2022 guidance says doors to plant rooms, service cupboards and risers should be checked at least every three months, the same as other communal fire doors. In other buildings, the frequency comes from your fire risk assessment, and riser doors should sit in the same programme as every other fire door rather than being left out. Our article on how often fire doors need to be inspected in a commercial building sets out the usual approach.
What should you do if a riser door fails?
Secure it straight away: lock it shut or make sure the closer works, and remove any wedge.
Log the defect with the location, the problem and a photo.
Check inside for unsealed holes where services pass through the floor or walls.
Arrange the repair with a competent contractor, from replacing seals and making good holes to replacing a door that was never fire rated.
Record the fix with photos so your fire door records show the defect was closed.
Our article on how to prove fire doors are compliant to an auditor covers what those records need to show.
What to do next: how Protest ES Ltd helps
Protest ES Ltd works with facilities managers, managing agents and FM providers across commercial, education, healthcare and public sector estates. We don't simply identify compliance issues. We help clients close them:
Fire door inspections that include riser, plant room and service cupboard doors, with door-by-door results and photos
Fire door remedials to replace seals, adjust or fit closers, make good holes and correct gaps, then record the repair
Fire door installation where a riser has a plain door that should be a fire door
BM TRADA Q-Mark certification for fire door installation, maintenance and inspection
One visit, more disciplines. Most FMs use separate contractors for fire doors, fire stopping and electrical testing, each with its own access, programme and paperwork. Protest ES Ltd delivers fire door work, passive fire protection, including fire stopping inside risers and fire compartmentation, and electrical compliance on the same visit: one contractor, one programme, one set of records across every site.
If your riser doors have never been part of your fire door checks, get in touch with our team or visit Protest ES Ltd.
Further reading from Protest ES Ltd
Frequently asked questions
What are riser doors?
Riser doors are the access doors or panels into a service riser, the vertical shaft that carries cables, pipes and ducts between floors. They let engineers reach the services while keeping the shaft closed off from the rest of the building.
Does a riser door need a "fire door keep locked shut" sign?
A riser door that is kept locked rather than self-closing is normally marked on the outside with a "Fire door keep locked shut" sign. It tells staff and contractors that the door must be locked again after use. A missing or painted-over sign is a common inspection finding.
Can an access panel be used instead of a riser door?
Yes, if the panel is tested and certified for the fire resistance the riser needs. Many riser access panels are not fire rated at all, so check the product information or have the panel checked rather than assuming.
Do riser doors need intumescent strips?
Many timber riser doors rely on intumescent strips and smoke seals, while some steel and specialist riser doors are tested without them. What matters is that the door is installed as it was tested. If strips or seals are fitted, they must be complete, unpainted and undamaged.
Who is responsible for riser doors in a commercial building?
The responsible person under the Regulatory Reform (Fire Safety) Order 2005, which in practice often falls to the facilities manager or managing agent. They need to make sure riser doors are checked, kept shut and repaired when they fail.
Can I put a padlock on a riser door?
A padlock hasp screwed through a fire door can damage the leaf and leave holes that weaken it. A lock fitted as part of the door's tested design is the better option. If a hasp has been added, have the door checked and the holes made good.
Do cupboard doors in a corridor need to be fire doors?
Often, yes. Where a cupboard opens onto an escape corridor or stair, or houses electrical equipment, the fire strategy usually requires a fire-resisting door so a fire inside cannot spread onto the escape route. Your fire risk assessment should confirm which cupboards this applies to.
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