2026-09-19 · HawkSwift Ltd

Fire Door Regulations UK: Legal Requirements, Ratings and Inspection Guide 2026

Fire doors are the single most underrated life-safety product in any UK building. They cost a fraction of the fire alarm system, yet when they work they hold back fire and smoke long enough for hundreds to escape. When they fail — and the data shows most do — compartmentation collapses, escape routes fill with smoke, and the building becomes a death trap.

The law takes fire doors seriously. The Regulatory Reform (Fire Safety) Order 2005 requires them to be maintained in efficient working order. The Fire Safety Act 2021 confirmed flat entrance doors are in scope. The Fire Safety (England) Regulations 2022 introduced mandatory quarterly and annual inspection intervals for residential buildings over 11 metres. And the Building Safety Act 2022 added long-term accountability for higher-risk buildings.

This guide covers what the law requires, how fire door ratings work, what inspectors check, and what happens when you get it wrong.

Are fire doors a legal requirement in the UK?

Yes — but the duty comes from several overlapping sources rather than a single Act.

Building Regulations Part B requires fire doors in specific locations in new and altered buildings: flat entrance doors, doors onto protected stairways, loft conversions, HMOs, and compartment walls. The exact ratings and positions are set out in Approved Document B.

The Regulatory Reform (Fire Safety) Order 2005 (RRO) applies to all occupied non-domestic premises and the common parts of residential buildings in England and Wales. Article 17 requires fire doors to be *maintained in an efficient state, in efficient working order and in good repair*.

The Fire Safety Act 2021 confirmed the RRO covers flat entrance doors of multi-occupied residential buildings, commencing in Wales on 1 October 2021 and in England on 16 May 2022.

The Fire Safety (England) Regulations 2022 (FSER 2022) added statutory check intervals: quarterly checks of communal fire doors and annual best-endeavours checks of flat entrance doors in residential buildings over 11 metres, plus resident fire-door information in all multi-occupied residential buildings.

The Building Safety Act 2022 imposes additional duties on higher-risk buildings (18m+ or 7+ storeys).

Scotland and Northern Ireland run separate regimes under the Fire (Scotland) Act 2005 and the Fire and Rescue Services (Northern Ireland) Order 2006.

Who is the responsible person?

The responsible person is whoever has control of the premises — typically the building owner, landlord, employer, or managing agent. The duty follows the role, not the person. Our guide to who is the responsible person under the RRO 2005 explains the role in full.

Fire door ratings: FD30, FD60, FD90, FD120

A fire door rating describes how long a complete doorset resisted fire in a standard furnace test. The rating belongs to the whole assembly — leaf, frame, seals, glazing, and ironmongery — never to the leaf alone.

The national route: BS 476-22

Under the traditional British method, doorsets are tested to BS 476-22:1987 and rated by minutes of integrity:

| Rating | Fire resistance | Typical leaf thickness | Common applications | |---|---|---|---| | FD30 | 30 minutes | 44mm | Flat entrances, internal office doors, lower-risk compartment lines | | FD60 | 60 minutes | 54mm | Protected stairwells, plant rooms, compartment walls | | FD90 | 90 minutes | 54mm+ | Protected shafts, higher-risk separations | | FD120 | 120 minutes | 64mm+ | High-risk industrial, specific compartment requirements |

An S suffix (FD30S, FD60S) adds cold-smoke control — the doorset has passed an ambient-temperature smoke leakage test (BS 476-31.1 or BS EN 1634-3) and is fitted with perimeter smoke seals.

The European route: BS EN 1634-1 and BS EN 13501-2

Under the harmonised European system, doorsets are tested to BS EN 1634-1:2014+A1:2018 and classified under BS EN 13501-2:

E30, E60 — integrity only (nearest equivalent to FD30, FD60)
EI30, EI60 — integrity and insulation
EW30, EW60 — integrity with limited radiation
Sa or S200 suffix — smoke control (Sa = ambient only; S200 = ambient and 200°C)

The 2029 switch

The UK government is withdrawing BS 476 fire resistance classifications from Approved Document B in stages: reaction-to-fire classes went in March 2025, and the remaining fire resistance references go on 2 September 2029, when only BS EN 13501-2 / BS EN 1634-1 evidence will be accepted for new building work in England.

Existing BS 476-tested fire doors do not need replacing. Approved Document B is guidance for new building work, not a maintenance regime for occupied buildings. What governs installed doors is the RRO 2005 and the fire risk assessment.

What does a fire door inspector check?

A fire door inspection assesses eight components:

1. Door leaf condition

The leaf must be free from holes, cracks, warping, delamination, and unauthorised modifications. Pet flaps, extra drilling, and non-standard letterboxes all void the certified fire rating.

2. Perimeter gaps

Head and jambs: 2–4 mm, aiming for 3 mm, consistent over the full length
Threshold (fire-only): 8–10 mm
Threshold (smoke-control FD30S+): maximum 3 mm, or sealed with a tested automatic drop seal

A £1 coin is approximately 3 mm thick and makes a workable site gauge.

3. Intumescent strips

Intumescent strips expand at approximately 200°C to seal the perimeter gap during a fire. They must be continuous, the correct type for the door's test evidence, undamaged, and not painted over.

4. Smoke seals

Smoke seals — brush or fin type — restrict cold smoke leakage at ambient temperature. Required on all S-rated doors. Must be continuous and undamaged.

5. Hinges

A minimum of three hinges, all CE-marked to BS EN 1935 and fire-rated. Screws present and tight, no hinge fatigue.

6. Self-closing device

Must shut the door fully and engage the latch from any opening angle. Closers must be CE-marked to BS EN 1154 (minimum power size 3).

7. Glazing

Any glazing must be fire-rated glass with intact beading and glazing seals matching the door's rating.

8. Certification label or plug

A certified fire door carries a label or colour-coded plug on the top or hinge edge. Absence of a label does not prove a door is not fire-resisting, but an unproven door in a critical position is a finding.

Fire door inspection frequencies

Fire door inspection in England runs on three levels:

Level 1: Statutory checks (FSER 2022)

For residential buildings over 11m with two or more sets of domestic premises:

Communal fire doors: at least every 3 months
Flat entrance doors: at least every 12 months (best endeavours)
Resident information: every 12 months and on new occupation

Level 2: Risk-assessed programme (RRO Article 17)

BS 9999:2017 calls for six-monthly inspections. BS 8214:2026 frames frequency by traffic: low-traffic doors around annually, high-traffic communal doors around twice a year.

Level 3: Formal periodic inspection

A full professional survey by an FDIS-certified, BM TRADA Q-Mark, IFC, or FIRAS inspector, producing a detailed report with remediation recommendations.

Who can carry out fire door checks?

Routine quarterly and annual visual checks do not require a third-party-certificated inspector. A competent member of staff, caretaker, or building manager can do them. Competence means understanding how a fire door assembly works and recognising defects.

Full professional surveys should be done by certified inspectors.

The five-step visual check

The BWF Fire Door Alliance promotes a five-step check anyone can apply:

1. Certification — Look for a label or coloured plug on the top or hinge edge 2. Gaps — Consistently under 4 mm around the top and sides 3. Seals — Intumescent strips and smoke seals present, continuous, undamaged 4. Closer — Door closes fully and latches from any angle 5. Condition — No holes, damage, or unauthorised modifications

Common fire door defects

| Defect | Approximate failure rate | |---|---| | Self-closer not functioning correctly | 34% | | Excessive gaps (>3 mm at head/jambs) | 28% | | Intumescent strips missing or painted over | 22% | | Smoke seals damaged or absent | 19% | | Door leaf damaged (holes, splits) | 15% | | Wrong door furniture (letter plates, cat flaps) | 12% | | Glazing not fire-rated or missing beading | 8% | | Hinges incorrect (fewer than 3, non-CE marked) | 7% |

FDIS survey findings: 76% of inspected doors failed in 2019, 75% in 2021, and 72% in March 2026.

Record-keeping requirements

Every check must be recorded with: date, door location, inspector name, defects found, remedial actions and timeline, and confirmation of completion. Records must be available for inspection by the fire and rescue authority. For flat entrance doors where access is refused, best endeavours must be documented: written notice, follow-up letters, and recorded attempts.

Penalties for non-compliance

Under article 32 of the RRO, failing fire safety duties where anyone is put at risk of death or serious injury carries, on conviction on indictment, an unlimited fine, up to two years' imprisonment, or both. Fire authorities can also serve enforcement notices (article 30) or prohibition notices (article 31).

In the 12 months to January 2026, London Fire Brigade took 1,152 enforcement actions across London, and fire doors feature in a large share of the deficiencies. Fire doors were cited in approximately 70% of enforcement actions against residential building managers in 2025.

Fire doors in Wales, Scotland and Northern Ireland

Wales: The RRO 2005 and Fire Safety Act 2021 apply. FSER 2022 does not apply — no statutory quarterly/annual check intervals. Wales has its own Approved Document B (Welsh amendments in effect from 20 December 2025) which still recognises BS 476 classifications. The Building Safety (Wales) Act 2026 creates Wales's own occupation-phase regime.

Scotland: Fire (Scotland) Act 2005 and Fire Safety (Scotland) Regulations 2006. No equivalent to FSER 2022 statutory check intervals.

Northern Ireland: Fire and Rescue Services (Northern Ireland) Order 2006. Separate inspection regime.

When to call a professional

Commission a professional fire door inspection when your fire risk assessment identifies fire doors as a significant risk, routine checks find defects that cannot be diagnosed visually, certification cannot be established, or you manage a higher-risk building under the Building Safety Act 2022.

Summary

Fire doors are a legal requirement in the UK. The RRO 2005 requires maintenance in efficient working order. FSER 2022 mandates quarterly communal checks and annual flat entrance checks in buildings over 11m. The Building Safety Act 2022 adds accountability for higher-risk buildings. The most common failures — excessive gaps, faulty closers, painted-over seals — are visible and fixable. The cost of a professional inspection is a fraction of an enforcement notice or prosecution.

Book a fire risk assessment with HawkSwift if you are not confident your inspection regime is compliant.

---

Frequently Asked Questions

How often should fire doors be inspected in the UK?

Communal fire doors in residential buildings over 11m must be checked at least every three months under Regulation 10 of FSER 2022. Flat entrance doors must be checked at least annually. For commercial premises, BS 9999 recommends six-monthly inspections, and BS 8214:2026 frames frequency by traffic level.

Can I check fire doors myself?

Yes, for routine visual checks. The responsible person can delegate checks to a trained member of staff, caretaker, or building manager. Full professional surveys should be carried out by FDIS-certified or equivalent inspectors.

What is the maximum gap allowed around a fire door?

Head and jamb gaps should be 2–4 mm, aiming for 3 mm. Threshold gaps are typically 8–10 mm for fire-only doors, and a maximum of 3 mm for smoke-control doors (FD30S and above) unless a tested automatic drop seal is fitted.

Do I need to replace fire doors tested to BS 476-22?

No. The withdrawal of BS 476 from Approved Document B on 2 September 2029 applies to new building work, not to doors already in service. A door tested to BS 476-22, correctly installed and in good condition, does not stop being a fire door in 2029.

What is the difference between FD30 and FD30S?

FD30 means the doorset achieved 30 minutes of integrity in a fire resistance test. FD30S adds cold-smoke control — the doorset has passed an ambient-temperature smoke leakage test and is fitted with perimeter smoke seals.

What happens if I fail to inspect fire doors?

Fire and rescue authorities can serve enforcement notices or prohibition notices. Under article 32 of the RRO, failing fire safety duties where anyone is put at risk of death or serious injury carries an unlimited fine, up to two years' imprisonment, or both.

Are fire doors required in HMOs?

Yes. HMOs require fire doors between sleeping accommodation and escape routes, at the top and bottom of staircases serving three or more storeys, and at flat entrance doors. The exact ratings are determined by the fire risk assessment.

Can a fire door be propped open?

No — never with a wedge, chair, or other improvised device. The only legal way to hold a fire door open is an electromagnetic device linked to the fire alarm system that releases the door to self-close on alarm activation.

Get a Fire Risk Assessment Quote