Fire prevention: Active and passive method differences

Fire doors are one of the most important life-saving features in any building. They are designed to slow the spread of fire and smoke, protect escape routes, and give occupants valuable time to evacuate. Yet despite their critical role, fire doors are often overlooked until something goes wrong.

At Artius Fire Protection, we regularly see doors that appear perfectly fine on the surface but fail essential safety checks. This guide explains exactly what happens during a professional fire door inspection in the UK, what inspectors look for, and why regular inspections are vital for protecting people, property, and compliance.

Why Fire Door Inspections Matter

A fire door is only effective if it performs exactly as it should when exposed to fire. Even minor defects – such as a missing screw or worn seal – can cause the door to fail in minutes rather than holding back fire for the required period.

Fire door inspections are not simply a “tick-box” exercise. They are a structured assessment designed to ensure that each door can perform its life-saving role under real fire conditions.

Who Is Responsible for Fire Door Safety?

In the UK, responsibility for fire door safety sits with the “Responsible Person” – typically the building owner, employer, managing agent, or landlord. They must ensure that fire doors are:

  • Correctly installed

  • Maintained in good condition

  • Inspected at suitable intervals

Failing to do so can lead to serious consequences, including enforcement action, fines, or even prosecution.

How Often Should Fire Doors Be Inspected?

While high-risk buildings such as residential blocks, care homes, and hospitals often require more frequent checks, best practice is:

  • Every 6 months – Full professional fire door inspection

  • Every 3 months – In high-use or vulnerable environments

  • Monthly – Basic in-house visual checks

Artius Fire Protection tailors inspection schedules based on building use, footfall, and risk level.

What Happens During a Professional Fire Door Inspection?

A professional inspection is a detailed, methodical process. Below is a breakdown of what Artius Fire Protection examines.

1. Door Certification and Identification

The inspection starts by confirming that the door is a genuine fire door. This includes:

  • Checking for certification labels or plugs

  • Confirming the door’s fire resistance rating (FD30, FD60 etc.)

  • Verifying that the door leaf and frame are compatible

If the door cannot be verified as a certified fire door, it is recorded as non-compliant.

2. Door Leaf Condition

The door leaf itself is carefully examined for:

  • Cracks, splits, holes or impact damage

  • Warping or bowing

  • Excessive wear around the edges

  • Evidence of unauthorised modifications (such as letterboxes or ventilation grilles)

Any compromise to the door leaf can significantly reduce its ability to resist fire.

3. Gaps and Clearances

Clearances around the door are measured using specialist gauges.

  • The gap between the door and frame should usually be between 2mm and 4mm

  • The threshold gap must not exceed 8mm (or 3mm if smoke seals are fitted)

Incorrect gaps allow smoke and flames to pass through far more quickly than intended.

4. Hinges and Fixings

Fire doors must have:

  • A minimum of three fire-rated hinges

  • All screws present and firmly secured

  • No signs of wear, looseness, or distortion

Loose hinges are one of the most common – and dangerous – defects.

5. Self-Closing Devices

The door closer is tested to ensure it:

  • Closes the door fully into the frame

  • Engages the latch every time

  • Is not obstructed or damaged

If a fire door does not close properly, it is not a fire door.

6. Latches, Locks and Handles

All ironmongery must be:

  • Fire-rated and compatible with the door

  • Securely fixed

  • Working smoothly without resistance

Any incorrect hardware can cause premature failure during a fire.

7. Intumescent and Smoke Seals

These seals expand in heat to block fire and smoke.

Inspectors check for:

  • Missing or damaged seals

  • Paint build-up preventing expansion

  • Correct positioning around the door leaf or frame

A fire door without effective seals is like having a gap in a fire wall.

8. Glazing and Vision Panels

Where glazing is present, it must be:

  • Fire-rated glass

  • Correctly fitted with approved glazing systems

  • Free from cracks or movement

Standard glass will shatter almost instantly in a fire.

9. Door Frames and Surrounding Structure

The frame is checked for:

  • Secure fixings

  • Damage or warping

  • Gaps between frame and wall

  • Suitable fire-stopping around the perimeter

Even a perfect door will fail if the frame is compromised.

10. Signage and User Awareness

Fire doors should be clearly labelled:

  • “Fire Door – Keep Shut” or “Fire Door – Keep Locked”

  • Visible and intact signage

This helps occupants understand how the door should be used daily.

After the Inspection: What Happens Next?

Once all checks are completed, Artius Fire Protection provides a detailed report that includes:

  • Pass or fail status for each door

  • Photographic evidence of defects

  • Clear recommendations for remedial action

  • Prioritisation of issues based on risk

This gives building managers a practical roadmap to achieving compliance.

Common Problems Found During Inspections

Some of the most frequent issues include:

  • Fire doors wedged open

  • Missing intumescent seals

  • Damaged door closers

  • Incorrect gaps around the door

  • Non-fire-rated ironmongery

These defects are often unintentional, yet they dramatically increase risk.

Why Choose Artius Fire Protection?

Artius Fire Protection specialises exclusively in fire safety services. Every inspection is carried out by trained professionals who understand not only regulations, but real-world risk.

Their approach is simple:

  • Clear, honest reporting

  • Practical guidance – not jargon

  • A focus on protecting people first, paperwork second

Final Thoughts

Fire door inspections are not about compliance alone – they are about preventing tragedy. A fire door that works properly can mean the difference between safe evacuation and devastating loss.

With Artius Fire Protection, building owners and managers gain peace of mind knowing that every fire door has been inspected with care, precision, and a genuine commitment to safety.