Sign 1: The door does not fully self-close

If a fire door does not fully close into its frame from open positions, that is a serious warning sign. Government guidance is explicit that this is very important because a door that fails to close fully will not adequately hold back fire and smoke. In many cases that points to repair if the closer, adjustment or latching can be corrected, but repeated failure may indicate that wider remedial work is needed.

Sign 2: The gaps are too large

A door with excessive gaps around the perimeter is another strong sign that action is needed. The government guide says the gap between the door and frame should never be more than 4mm, except at the bottom where it should be as small as practicable. If gaps are outside tolerance because of wear, poor fit, movement or past alterations, the door may need adjustment, repair or replacement depending on the extent of the problem.

Sign 3: Seals, glazing or hardware have been damaged or altered

Damaged glazing, missing screws, faulty hinges, damaged ventilation grilles and compromised intumescent strips or smoke seals all feature in the government’s list of issues to check. These are not cosmetic details. They are part of the doorset’s overall performance.

Where the issue is local and can be corrected properly, repair may be the right answer. Where the door has been heavily altered, poorly maintained over time or can no longer be relied upon as part of the fire strategy, replacement is often the better long-term option.

Sign 4: There is visible damage to the leaf, frame or surrounding assembly

Splits, holes, warping, frame damage and defects in the wall or fixing around the door can all affect fire performance. The official guidance says the door, frame and securing wall should be free from defects that could affect resistance to fire or smoke, and it also warns against alterations that may affect the fire-resisting qualities of the door.

Sign 5: You cannot be confident in what is installed

One useful nuance in the government guide is that the absence of certification, intumescent strips or smoke seals does not automatically mean a door is unfit for purpose. The real issue is whether the door remains adequate in the context of the fire risk assessment. That said, if a replacement or upgraded door cannot be properly identified, assessed or relied on, uncertainty itself becomes a risk that often pushes the decision towards replacement.

Repair or replace?

Repair is often appropriate where the underlying doorset remains sound and the defect can be corrected without undermining performance. Replacement is often the stronger option where there is major warping, repeated failure, significant alteration, uncertain provenance or a poor fit that cannot be corrected reliably. For new and replacement work, Building Regulations guidance in Approved Document B remains part of the compliance picture.

Final thought

If you are asking whether your fire doors meet regulations, there is a fair chance they need reviewing now rather than later. Fire door compliance is about performance in service, not appearance alone. A quick response to minor faults can prevent a much larger and more expensive replacement programme later on.