In the escape stair of an office building I found a wooden wedge jammed under the door, holding it permanently open, a cleaning trolley beside it, and a sign on the wall asking people not to prop the fire door. The door was certified, the frame sound, the seals in place. With that wedge there it was not a fire door at all, just a steel plate. Maintenance is less a technical task than a matter of continuity.
Why it needs maintenance
Fire resistance is valid as a tested assembly: leaf, frame, hinges, lock, closer, seals and installation together. Every one of those is either a moving part or an ageing one. Closer fluid thins, hinges develop play, seals compress, latches stop finding their keeps. Over hundreds of cycles a day these changes creep forward quietly until somebody notices the door closing without latching.
The monthly visual check
- Does the door close fully on its own and latch with a solid sound?
- Is the gap between leaf and frame even all the way round? A wide gap on one edge suggests the leaf has dropped.
- Are the intumescent seals fully seated, unbroken and unpainted?
- Is anything holding the door open: wedge, chain, hook, rope?
- Has signage, posterboard or cladding been added to the leaf?
- Does the panic bar release in one movement with one hand?
- Is the escape route in front of the door clear?
This takes five minutes and needs no specialist; building management can do it.
Closer adjustment
The closer causes most of the trouble. Two settings matter: closing speed and final latching force. Too fast and the door slams, stressing frame and hinges and encouraging users to prop it open. Too slow and it stalls in the last centimetres, so the latch never enters the keep and the door looks closed without being secured. Latching force must overcome seal resistance. Adjust at the screws on the closer body, then test by opening fully and releasing several times. A closer leaking oil is replaced, not repaired.
Seals and gaps
Intumescent seals do invisible work until they expand and close the leaf-to-frame gap in a fire. What maintenance looks for is integrity: a seal out of its channel, cut during cleaning or painted over has lost its function. Smoke seals must stay in continuous contact. Perimeter gap size matters too; when it grows beyond the tested value the claim weakens. Watch the bottom gap in particular, because it changes whenever floor finishes are built up or a threshold is removed.
Hardware
Check hinge screws for looseness and the leaf for vertical droop; three-way adjustable hinges allow correction without dismounting. Use graphite or a dry lubricant in the cylinder, since oil-based sprays attract dust. Panic hardware must move without catching, and water entering the mechanism during cleaning is the most common cause of failure. On double leaves, test the sequence selector: the inactive leaf must close first.
Surface and records
Fire doors are powder coated with no laminate layer, so cleaning means a damp cloth and no solvents or abrasives. Touch in rust spots in the matching colour before they spread, and never paint over seals, labels or closer linkages. Keep dated records: door number, inspection date, closing behaviour, seal condition, panic hardware, action taken. Photograph the identification labels at handover and match them to door numbers; years later that record settles which door belongs to which system.
Spare parts and supply
Replacement parts must be the equivalents covered by the test. Fitting something merely similar voids the rating, which is why the system reference needs to stay on file. Send us the information on your door label and we will match hardware from our fire door systems. For common-area doors outside the escape route, maintenance is lighter and sheet panel doors are usually sufficient. Spare seals, closers and panic sets ship from Istanbul alongside door orders or separately by courier.
