Top 7 Mistakes Found in Fire Door Inspections

Fire doors are vital. They stop fire and smoke from spreading. But many fail. Some fail because of damage. Others fail because no one checked them properly.

This article breaks down the most common mistakes seen during fire door inspections. It’s not a checklist. It’s a reality check.

[edit] 1. Gaps Around the Door

Too much space around the door frame is a problem. If gaps are wide, smoke slips through.

[edit] Threshold and side gaps

Sides should have no more than a 4mm gap. The bottom? No more than 8mm. But many doors have larger gaps.

Doors swell, shrink or get misaligned. Installers don’t always follow specs. Gaps are often uneven. That’s a fail.

[edit] Lack of appropriate seals

Every fire door should have intumescent seals. These swell in heat to block smoke and flames.

Sometimes they’re missing. Sometimes damaged. Sometimes the wrong type.

Without proper seals, the door might look fine but won’t perform when needed.

[edit] 2. Damaged or Incompatible Door Components

A fire door isn’t just the door leaf. Hinges, handles, closers, seals and glazing all matter.

[edit] Non-fire-rated hardware

Many use the wrong hardware. Regular handles or hinges won’t hold during a fire.

Only fire-rated gear can withstand heat. If the label's missing or unclear, it fails.

[edit] Broken or missing parts

Doors often have loose screws. Handles fall off. Closers don’t shut properly.

Glass panels crack. Frames warp. These small faults stack up. They reduce protection fast.

[edit] 3. No Fire Door Signage

Fire doors must be marked. If not, people prop them open or treat them like regular doors.

Signs like “Fire Door Keep Shut” are essential. Yet many doors lack them. Or the signs peel off. Or someone removed them.

It’s a small thing. But it tells people how to use the door. No sign? No compliance.

[edit] 4. Incorrect Installation

A door is only as good as its installation. Fit it wrong and it won’t work.

Doors must sit flush. Hinges should be tight. Gaps must be even. But often they’re not.

Installers rush. They cut corners. Or they’re just not trained.

Even a certified door will fail if badly fitted. That’s the harsh truth.

[edit] 5. Wedging Open or Obstructing the Door

Fire doors only work when shut. Yet people love to wedge them open.

This is one of the most common failures. Below are typical ways doors get blocked or left open:

• Doorstops or rubber wedges
• Chairs or bins propping them
• Rope or string tied to handles
• Closers removed or disabled

Sometimes it’s for airflow. Sometimes convenience. Either way, it’s dangerous.

Once open, the door can’t stop fire or smoke. That defeats its entire purpose.

[edit] 6. Lack of Routine Maintenance or Inspection

Faults build up over time. Without checks, they go unnoticed.

Taking a fire door inspection course can help facility managers spot what others miss. Screws loosen. Seals crack. Closers stop working.

No maintenance plan? Problems stay hidden. And the door fails when it matters most.

[edit] 7. Untrained or Unqualified Inspectors

Some people doing the checks shouldn’t be doing them at all. They lack training. They miss details. They tick boxes without knowing what to look for.

A proper fire door check isn’t just about looking at the door. It’s about knowing how fire doors work. What should be there. What shouldn’t.

[edit] Missed signs of failure

They might ignore small gaps. Forget to test the closer. Skip over broken seals.

Without the right training, these things go unnoticed. That makes the inspection useless.

Worse, it gives a false sense of safety. Everyone thinks the door’s fine. It’s not.

[edit] Bigger safety risks

An untrained inspector can’t connect the dots. They don’t link the faults to the wider risk.

That’s when things get serious. One missed door can mean the difference between containment and chaos.

This ties into wider duties like a fire risk assessment. If the assessor isn't trained in spotting door faults, the whole assessment could miss major fire safety issues.

[edit] Not Just A Door: It’s a Barrier Between Life and Death

Fire doors aren’t just wood and hinges. They’re part of the escape route. They hold back smoke so people can get out. They protect stairwells, corridors and exits.

If they fail, people get trapped. Smoke spreads. Fire moves faster.

Every mistake in inspection adds to that risk. A gap. A missing sign. A loose hinge. Each one matters.

[edit] Closing the Gaps (Literally and Figuratively)

Too many fire doors fail inspection. Not because they’re bad. But because no one maintained them. Or someone installed them wrong. Or the inspection was careless.

Fixing this isn’t complex. It just takes effort:

• Train the right people
• Inspect doors regularly
• Replace worn parts
• Never wedge doors open
• Keep signage clear

Most problems are avoidable. But only if people care enough to look closely. Fire doors save lives. But only if they’re working when the fire starts. So treat them like what they are — lifesaving tools. Not just another door in the building.