Fire Door Maintenance: A 6-Monthly Checklist

Fire doors deteriorate over time through normal use, accidental damage, and well-meaning but misguided alterations. BS 8214:2016, the British Standard for timber fire doors, recommends that fire doors in communal and commercial settings be inspected at least every six months. The Fire Safety (England) Regulations 2022 made quarterly checks of communal fire doors and annual checks of flat entrance doors a legal requirement in residential buildings. A structured checklist ensures nothing is missed.

The Inspection Checklist

Start with a visual check of the door leaf. Look for any damage, warping, delamination, or holes. Even a small hole drilled for a now-removed sign or spy viewer can compromise fire integrity. Check both faces and all four edges. Next, examine the frame for damage, distortion, or gaps between the frame and the wall. The frame-to-wall junction should be properly fire stopped with intumescent mastic — if you can see daylight or feel a draught, the stopping has failed or was never installed.

Check the gaps between the door and frame using a gap gauge. The gaps at the head and both jambs should be between 2mm and 4mm when the door is closed. The threshold gap should not exceed 8mm (or 10mm with a drop seal). Gaps that are too large allow fire and smoke to bypass the seals; gaps that are too small cause the door to bind, which can prevent the closer from latching it shut.

Seals, Hardware, and Closers

Inspect the intumescent strips along the door edges or within the frame rebate. They should be continuous, undamaged, and free from paint contamination. If the strips are painted over thickly, they may not expand properly when exposed to heat. Smoke seals (the flexible brush or rubber strips) should be intact and making light contact when the door is closed.

Test the self-closing device by opening the door to approximately 5 degrees and releasing it. The door should swing closed and latch fully into the frame without any manual push. If the closer struggles or fails to latch the door, it needs adjusting or replacing. Check that all hinges are tight, with no screws missing, and that the door does not drop or sag. Finally, confirm that any glazing is fire-rated and that the glazing beads and seals are intact. Record your findings, note any defects, and arrange remediation promptly — a failed fire door is a failed fire strategy.