If you’ve ever wondered what happens during a professional fire door inspection, you’re definitely not alone. Most people see fire doors every day without really thinking about them. They quietly sit there doing their job in the background, a bit like the IT guy in the office. Nobody notices them… until something goes horribly wrong.
But here’s the thing: fire doors are one of the most important safety systems inside a building. And just like a car needs an MOT, fire doors need regular inspections to make sure they’ll actually perform properly during a fire.
At Southern Fire Door Services, we carry out professional fire door inspections across commercial and residential properties throughout the South. So today, we’re pulling back the curtain and explaining exactly what happens during a professional fire door inspection.
Why Fire Door Inspections Matter
Before we dive into what happens during a professional fire door inspection, let’s quickly explain why inspections are so important.
Fire doors are designed to slow the spread of fire and smoke. They protect escape routes, compartmentalise buildings, and help save lives. But if a fire door has missing seals, damaged hinges, oversized gaps or faulty closers, it may completely fail during a fire.
That’s why regular inspections are required in many buildings under UK fire safety legislation. In residential blocks over 11 metres high, for example, the Fire Safety (England) Regulations 2022 require routine checks of communal fire doors and flat entrance doors.
In short: inspections aren’t just paperwork exercises. They’re life safety checks.
Step 1 – Checking the Certification
One of the first things that happens during a professional fire door inspection is checking whether the door is actually certified.
A proper fire door should have certification labels or plugs showing:
- The manufacturer
- The fire rating (FD30, FD60 etc.)
- The test standard
- Traceability information
If certification is missing, damaged or impossible to verify, it immediately raises questions about compliance.
This is one of the reasons professional inspections matter, because many older doors have been modified, replaced, or repaired incorrectly over the years.
Step 2 – Inspecting the Door Leaf
Next, the inspector checks the physical condition of the door leaf itself.
During a professional fire door inspection, we look for:
- Cracks or splits
- Warping or twisting
- Impact damage
- Unauthorised modifications
- Drilled holes or missing hardware
You’d be amazed what we find sometimes. We’ve seen fire doors trimmed so aggressively they looked like someone attacked them with a lawnmower.
Even small alterations can seriously reduce fire resistance.
Step 3 – Measuring Door Gaps
One of the most important parts of what happens during a professional fire door inspection is gap checking.
Fire doors need very precise gaps around the frame to function correctly. Too tight? The door may not close properly. Too wide? Smoke and fire can pass through.
Inspectors measure:
- Head gaps
- Side gaps
- Threshold gaps
Typically, the gap around a fire door should be around 3–4mm depending on the manufacturer’s specification.
Sounds tiny, doesn’t it? But in fire safety, millimetres matter.
Step 4 – Checking Intumescent Strips and Smoke Seals
During a professional fire door inspection, inspectors carefully check all intumescent strips and smoke seals.
These components are critical because:
- Intumescent strips expand during heat exposure to seal gaps
- Smoke seals help prevent smoke spread before high temperatures occur
If seals are missing, damaged, painted over or poorly fitted, the door may fail its intended fire rating.
And yes, people really do paint over smoke seals. We wish we were joking.
Step 5 – Testing the Self-Closing Device
Another major part of what happens during a professional fire door inspection is testing the door closer.
Fire doors should fully self-close into the frame without sticking.
Inspectors check:
- Closing speed
- Latch engagement
- Alignment
- Resistance points
A fire door wedged open or unable to close properly is basically as useful as an umbrella made of tissue paper.
Step 6 – Inspecting Ironmongery and Hardware
Fire-rated hinges, handles, locks and latches are all inspected during the process.
We check for:
- Correct hinge quantities
- Loose hardware
- Missing screws
- Non-compliant replacements
- Signs of wear
This is a surprisingly common issue. Sometimes standard hardware gets swapped in during maintenance work without anyone realising it affects the fire rating.
Step 7 – Producing the Inspection Report
Once all checks are completed, the inspector produces a detailed report outlining:
- Passes and failures
- Compliance issues
- Photographic evidence
- Recommended remedial work
- Risk priorities
This report gives building owners or responsible persons a clear roadmap for achieving compliance.
Common Problems Found During Fire Door Inspections
During professional inspections we regularly find:
- Missing smoke seals
- Oversized gaps
- Incorrect hinges
- Broken closers
- Damaged door leaves
- Uncertified glazing
- Doors wedged open
Most issues are fixable, but only if they’re identified early.
Internal Fire Safety Resources
If you’d like to learn more about fire safety and compliance, these guides may help:
- Fire Door Inspections
- Fire Door Inspection Guide
- Fire Door Regulations UK
- Fire Door Maintenance Plan
- Fire Door Repair Services
Book a Professional Fire Door Inspection
Now you know exactly what happens during a professional fire door inspection, the next step is making sure your building stays compliant and safe.
At Southern Fire Door Services, we provide thorough inspections, clear reporting, and practical remedial advice for commercial and residential buildings across the South.
Contact us today to arrange a professional fire door inspection.
Because when it comes to fire safety, guessing is not a maintenance strategy.
Southern Fire Door Services – protecting people, properties and compliance.
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