The Complete Guide to Fire Door Compliance in the UK (2026)

Fire doors are critical life-safety devices in buildings across the UK. Industry surveys have found that a significant proportion of fire doors fail inspection due to maintenance issues. This guide covers everything you need to know about fire door compliance, from legal requirements to practical inspection guidance.

What is a Fire Door?

A fire door is not just an ordinary door. It’s a purpose-built, tested assembly designed to:

• Compartmentalise fire – containing flames within a section of a building
• Prevent smoke spread – smoke seals stop toxic fumes spreading through corridors
• Protect escape routes – giving occupants time to evacuate safely
• Support firefighting – allowing fire services to tackle fires more effectively

Fire doors are rated by the time they can withstand fire:

• FD30 – 30 minutes fire resistance
• FD60 – 60 minutes fire resistance
• FD90 – 90 minutes fire resistance
• FD120 – 120 minutes fire resistance

The ‘S’ suffix (e.g., FD30S, FD60S) indicates the door also includes smoke seals.

UK Fire Door Regulations

Regulatory Reform (Fire Safety) Order 2005 (RRFSO)

The RRFSO places responsibility for fire safety on the Responsible Person – typically the building owner, employer, or managing agent. Under this legislation:

• Fire doors must be maintained so they are effective and in good working order
• Regular inspections must be carried out
• Records of maintenance must be kept
• Non-compliance can result in prosecution and unlimited fines

Building Safety Act 2022

The Building Safety Act 2022 introduced the concept of the Golden Thread – a requirement for Higher-Risk Buildings to maintain digital, accurate, and accessible building safety information throughout the building’s lifecycle.

For fire doors in Higher-Risk Buildings, applying the Golden Thread principles means maintaining clear, accurate, and accessible digital information demonstrating how these safety-critical assets are installed, inspected, maintained, and managed over time. This typically includes inspection records, maintenance history, and an auditable record of responsibility.

While asset identification methods such as QR codes are not a statutory requirement, they are commonly used to support accurate record-keeping and traceability.

BS 8214:2016

BS 8214:2016 is the British Standard code of practice for fire door assemblies. It sets out:

• Gap tolerances for fire doors
• Component requirements (hinges, seals, closers, etc.)
• Inspection frequency recommendations
• Competency requirements for inspectors

BS 8214 Gap Measurement Requirements

One of the most common causes of fire door failure is incorrect gaps. BS 8214 specifies tolerances:

Standard Fire Doors (FD30, FD60, etc.)

• Head gap (top): 2-4mm
• Jamb gaps (sides): 2-4mm
• Threshold gap (bottom): Maximum 8-10mm (depending on fire test evidence)

The minimum 2mm gap is required for the door to operate freely. The maximum 4mm ensures fire integrity.

Smoke Doors (FD30S, FD60S, etc.)

• Head gap (top): 2-4mm
• Jamb gaps (sides): 2-4mm
• Threshold gap (bottom): Maximum 3mm (no seal) or 8-10mm (with drop-down seal)
• Smoke seals are fitted at head and jambs only – not at the threshold
• The threshold is controlled either by a restricted 3mm gap or by fitting a drop-down seal

Measurement Points

When measuring gaps, check:

1. Top of the door (head)
2. Both sides (jambs) – left and right
3. Bottom (threshold)
4. Meeting stile (for double doors)

Gaps that exceed these tolerances must be remediated before the door can pass inspection.

All gap measurements must ultimately be verified against the specific fire door manufacturer’s fire test evidence, as permitted tolerances may vary.

Fire Door Components

A compliant fire door assembly includes several key components:

Door Leaf

The door itself must be:

• Fire rated to the required standard
• Free from damage, warping, or modification
• Correctly sized for the frame

Frame

The frame must:

• Match the door’s fire rating
• Be securely fixed to the wall
• Be square and true

Intumescent Seals

Intumescent seals expand when exposed to heat, filling gaps and preventing fire spread. They must be:

• Present and continuous around the door
• Undamaged and not painted over
• Correctly sized (typically 10mm, 15mm, or 20mm)

Smoke Seals

Required on FD30S, FD60S doors, smoke seals prevent cold smoke from spreading. They’re typically:

• Brush or combined intumescent/smoke seal type
• Fitted to head and jambs only (not at threshold)
• At the threshold, smoke control is achieved by either a 3mm max gap or a drop-down seal

Hinges

Fire doors require appropriate hinges tested to the door’s fire rating:

• Minimum 3 hinges for standard height doors
• Additional hinges may be required for heavier or taller doors
• CE/UKCA marked hinges certified to BS EN 1935
• Typically steel or stainless steel construction

Self-Closing Device

All fire doors must self-close from any angle:

• Overhead door closers (most common)
• Concealed closers
• Floor springs
• Must close the door firmly into the frame

Latch/Lock

The door must latch securely when closed:

• Mortice latches or tubular latches as specified in the door’s certification
• Locks must be compatible with the door’s fire rating
• Magnetic holders acceptable if connected to fire alarm system

Signage

Fire doors must display appropriate signage:

• “Fire Door Keep Shut” or “Fire Door Keep Locked”
• Signs for automatic fire doors
• Must be visible and legible

Glazing (if fitted)

Fire-rated glazing must be:

• Certified to the door’s fire rating
• Held in place with fire-rated beading
• Undamaged and properly sealed

Fire Door Inspection Checklist

A thorough fire door inspection should check:

Visual Inspection

• Door closes fully and latches
• No visible damage to door leaf or frame
• No gaps or holes in door surface
• Paint/finish intact (not obscuring certification labels)

Gap Measurements

• Head gap 2-4mm
• Both jamb gaps 2-4mm
• Threshold gap ≤8-10mm (or ≤3mm for smoke doors without drop-down seal)
• Meeting stile gap appropriate (double doors)

Seals

• Intumescent seals present and continuous
• Seals undamaged and not painted over
• Smoke seals present (if FD30S/FD60S)
• Seals correctly fitted

Hardware

• Minimum 3 fire-rated hinges
• Hinges secure and not loose
• Self-closer functions correctly
• Door closes from any angle
• Latch engages properly
• Lock fire-rated (if fitted)

Signage & Labels

• “Fire Door Keep Shut” sign present
• Certification label visible (if fitted)
• Labels not obscured

Frame

• Frame securely fixed
• Frame square and true
• No excessive gaps between frame and wall
• Architrave intact

Common Fire Door Defects

The most common defects found during inspections:

1. Excessive gaps – gaps larger than BS 8214 tolerances
2. Missing or damaged seals – intumescent/smoke seals removed or worn
3. Faulty closers – doors not closing or latching properly
4. Wrong or missing hinges – brass hinges, missing hinges
5. Damaged door leaves – holes, splits, warping
6. Missing signage – no “Fire Door Keep Shut” signs
7. Propped or wedged doors – defeating the fire door’s purpose
8. Modified doors – additional locks, letterboxes, cat flaps installed without certification

How Often Should Fire Doors Be Inspected?

BS 9999 and recognised industry guidance commonly recommend more frequent inspection (often around six-monthly) for higher-risk environments such as hospitals, care homes, and HMOs, with annual inspections typical for lower-risk premises unless otherwise identified by the fire risk assessment.

Additional inspections should be carried out:

• After any damage or modification
• Following fire risk assessment recommendations
• When defects are reported by building occupants

Who Can Inspect Fire Doors?

While there’s no legal requirement for third-party certification, BS 8214 recommends:

• Competent persons with appropriate training
• Understanding of fire door construction and components
• Knowledge of relevant standards and regulations
• Ability to identify defects and recommend remedial action

Professional bodies like the Fire Door Inspection Scheme (FDIS) and British Woodworking Federation (BWF) offer accredited training.

Ultimately, competency is determined by knowledge, training, and experience rather than membership of a specific scheme.

Penalties for Non-Compliance

Failure to maintain fire doors can result in:

• Prosecution under RRFSO – unlimited fines
• Personal liability for Responsible Persons
• Serious enforcement action following a fatal fire, including potential charges under health and safety or corporate manslaughter legislation where gross management failures are proven
• Insurance invalidation – claims may be rejected
• Prohibition notices – buildings closed until remediated

The Grenfell Tower tragedy highlighted the critical importance of fire door compliance, with subsequent investigations revealing widespread failures across the UK building stock.

Digital Fire Door Management

Digital record-keeping is increasingly expected, particularly for Higher-Risk Buildings, to demonstrate effective management, accessibility of information, and compliance with Golden Thread principles.

For buildings subject to these requirements, this typically means maintaining:

• Digital asset registers of all fire doors
• Inspection records with dates, findings, and photos
• Remedial action tracking showing defects and fixes
• Audit trails demonstrating compliance

Software solutions like IgnisTrack provide:

• Mobile apps for on-site inspections
• BS 8214 compliant gap measurements
• Photo evidence capture
• Instant PDF report generation
• QR code door tracking
• Cloud-based record storage

IgnisTrack supports compliance management and record-keeping but does not replace the requirement for competent inspection or professional judgement.

Conclusion

Fire door compliance is not optional – it’s a legal requirement that protects lives. With many UK fire doors failing inspection due to poor maintenance, there’s significant work to be done across the building stock.

Key takeaways:

1. Know your responsibilities under RRFSO and Building Safety Act
2. Inspect regularly – at least annually, more frequently for higher-risk buildings
3. Document effectively – digital records support Golden Thread principles for Higher-Risk Buildings
4. Fix defects promptly – gaps, seals, and closers are common failures
5. Use competent inspectors – training, knowledge, and experience matter

Fire doors only work if they’re properly maintained. Regular inspection and remediation is essential to protect building occupants and meet your legal obligations.

Requirements and expectations may evolve as guidance and secondary legislation are updated.

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This guide is provided for general information purposes only. Fire door specifications and tolerances should always be verified against the specific door manufacturer’s fire test evidence and current editions of relevant British Standards. For definitive guidance, consult BS 8214, the door manufacturer’s data sheets, and appropriately qualified fire safety professionals.

IgnisTrack is fire door inspection software designed for UK compliance. Start your 14-day free trial at ignistrack.com.