The main point is fire doors are there to keep you safe from fire. On installation fire doors will be certified by the installer as when installed correctly the doors are able to contain a fire for 30, 60, or 90 minutes depending on the need 0f the door set.  As time goes on when a building is in use, fire doors can become worn, damaged or misused. A faulty fire door is not always obvious, so regular inspections by a trained specialist will ensure that your fire doors are always able to do their job. Keep you safe!