Fire doors are one of the most critical elements of passive fire protection. Designed to contain fire and smoke, they protect escape routes and save lives. However, inspection data across the UK continues to highlight a worrying trend – a significant number of fire doors are failing to meet required standards.

For responsible persons, landlords and building managers, understanding why fire doors fail inspections is key to staying compliant and ensuring occupant safety.

The Legal Context: UK Fire Door Responsibilities

Under the Fire Safety (England) Regulations 2022, fire doors must be regularly inspected and maintained to ensure they remain fit for purpose. Responsible Persons are legally required to:

• Carry out our routine fire door checks
• Maintain doors in efficient working order
• Keep records of inspections and repairs

Failure to demonstrate compliance can result in enforcement action and increased liability in the event of a fire.

The Most Common Reasons Fire Doors Fail Inspections

Excessive Gaps Around the Door – Incorrect gaps between the door leaf and frame are the most common cause of failure, accounting for around 77% of issues.

Fire doors are designed to operate within strict tolerances (typically 3-4mm). Larger gaps allow smoke and fire to pass through, compromising compartmentation.

Missing or Damaged Smoke Seals – Intumescent and smoke seals are essential for preventing the spread of smoke, often the biggest killer in a fire.

Common issues include:

• Missing seals
• Painted over seals
• Damaged or poorly fitted strips

Without effective seals, even a correctly installed fire door will fail to perform.

Poor Maintenance and General Wear – Over half of fire doors are linked to a lack of maintenance.

Typical problems include:

• Warped or damaged doors
• Loose hinges or missing screws
• Broken components

Fire doors are not “fit and forget”; they require ongoing inspection and upkeep.

Faulty or Missing Door Closers – A fire door must fully close and latch to be effective.

Inspectors frequently find:

• Disconnected closers
• Doors wedged open
• Closers are incorrectly adjusted

If a door doesn’t self-close properly, it cannot provide protection during a fire.

Incorrect Installation – Improper installation accounts for a significant proportion of failures (around 31%)

Common installation issues include:

• Incorrect frame fitting
• Non-compliant fixings
• Poor alignment

Even a certified fire door can fail if it hasn’t been installed in accordance with tested standards.

Non-Compliant Ironmongery – All hardware, locks, and handles must be fire-rated and correctly installed.

Inspection failures often involve:

• Missing screws
• Non-certified components
• Incompatible hardware

These seemingly minor details can significantly reduce fire resistance.

Damaged or Incorrect Glazing – Vision panels are another frequent weak point.

Failures occur when:

• Standard glass is used instead of fire-rated glazing
• Beading is damaged or loose
• Glass is cracked

In a fire, non-compliant glazing can fall rapidly, allowing fire to spread.

Lack of Certification or Labelling – Fire doors should have a clear certification (e.g. FD30 or FD60 labels). Missing or unclear labelling raises immediate compliance concerns and can lead to failure during inspection.

Why This Matters

Fire doors play a vital role in:

• Protecting escape routes
• Slowing fire and smoke spread
• Allowing safe evacuation
• Supporting firefighting operations

When they fail, the consequences can be severe. The importance of properly functioning fire doors has been heavily emphasised following major incidents such as the Grenfell Tower Fire, which highlighted widespread issues in passive fire protection systems.

How to Avoid Fire Door Failures – To remain compliant and ensure safety, organisations should:

• Implement regular inspection programmes
• Use competent, certified inspectors
• Carry out prompt repairs and maintenance
• Ensure correct installation by qualified professionals
• Maintain clear documentation and records

For higher-risk residential buildings (over 11m), inspections must be more frequent and formally recorded.

Final Thoughts

Fire door failures are rarely caused by a single issue. More often, the result is a combination of poor installation, lack of maintenance and insufficient understanding of responsibilities.

The good news is that most failures are preventable. With the right inspection regime and professional support, fire doors can perform exactly as intended, protecting lives and property when it matters most.