Fire door checks: what to actually look at, door by door

A fire door does its job silently for years and then, in the moment it actually matters, either holds or doesn't. That's exactly why routine checks matter more than they might seem to on an ordinary day — a fire door with a worn seal or a wedged-open closer looks identical to a working one right up until it's tested by an actual fire.

The basic components worth checking

A competent, consistent check doesn't need specialist equipment for a routine look — it needs a short, repeatable set of things to examine on every door, every time, so nothing gets skipped because it's inconvenient that day.

The door leaf and frame

Check for visible damage, warping, or holes — including small, unauthorised holes drilled for cabling or fixtures that can compromise the door's fire performance more than their size suggests. The gaps between the door and frame matter more than most people expect; our separate piece on fire door gaps and tolerances covers this in more depth.

Seals and hardware

Intumescent seals and, where fitted, smoke seals should be continuous and undamaged around the door edge. Hinges should be firmly fixed with no missing screws, and any self-closing device should close the door fully into the frame from any open position — not just from a few degrees ajar.

Signage and general condition

Fire door signage, where required, should be present and legible. More generally: is the door being used as intended, or has it been propped, wedged or otherwise defeated for everyday convenience? This is one of the most common and most avoidable failure points found on routine checks.

• –Door leaf and frame: no visible damage, warping, or unauthorised holes
• –Gaps around the door: consistent and within tolerance on all sides, including the threshold
• –Seals: intumescent (and smoke seal, where fitted) continuous and undamaged around the edge
• –Hinges: firmly fixed, correct number, no missing or loose screws
• –Self-closer: closes the door fully and latches from any open position, every time
• –General use: not wedged, propped, or otherwise defeated for convenience

How often a routine check like this should happen

This is covered in more detail in our piece on inspection frequency, but the short version is that routine visual checks are generally expected considerably more often than the formal, fuller inspections a specialist might carry out — because most of what defeats a fire door in practice (a wedge, a worn seal, a door that's stopped latching) is easy to spot on a quick look and easy to miss if nobody's looking regularly.

Recording what's found, properly

A check that isn't recorded is barely better than a check that didn't happen, because there's no way afterwards to show it was actually done, or to spot a door that's failing the same check repeatedly. Dated records with photo evidence against each door make patterns visible — a door that keeps failing to latch properly is telling you something different from a door that's failed once — which is a large part of what a structured fire door register, whether paper or digital, is actually for.

The door that passes every inspection

A door inspected quarterly and recorded as satisfactory every time is either genuinely well maintained or not genuinely being inspected. The difference is visible in the records: a real inspection history contains variation — an adjustment here, a seal replaced there, a hinge noted — because doors in daily use change. An unbroken run of clean results on a heavily used door is worth a second look at the process rather than treated as reassurance.

The related pattern is a door that fails, gets adjusted, and fails the same way three months later. Recorded as two separate findings, it looks like routine maintenance. Recorded against the door, it is a door telling you something about its frame, its use or its closer.

Common mistakes

• –Recording a result without recording what was actually checked
• –No history against the individual door, so repeat defects look like new ones
• –Inspecting only the doors that are easy to reach
• –Treating an unbroken run of passes as confirmation rather than a prompt
• –Not identifying doors uniquely, so records cannot be tied to a specific leaf
• –Checking the door and not its surrounding frame, seals and hardware

This is a guide to routine visual checks, not a substitute for the relevant British Standards or a formal fire door inspection by a suitably qualified surveyor — anything found that raises a genuine doubt about a door's performance should be escalated to a competent professional.