Is a repaired fire door still a fire door?

We use parts that suit the door and keep inside the limits the door maker has set. A repaired door stays a fire door on that basis.

We size a new closer for the leaf, fit a seal of the right type and replace hinges as a matching set. We write up each repair with the parts used and a photo, so if anyone asks about the door in 5 years there is a record. Of the 147 doors we dealt with at two secondary schools and an almshouse in Luton, 140 were repaired on that basis.

Taking too much timber off an edge, or cutting in a flap or glazed panel that was never tested with that door, can end it.