A hinge carries the full weight of a door every time it opens, so the type you choose matters more than its size on the shelf suggests. Heavier doors, fire doors and external doors all have different hinge requirements, and getting this wrong is one of the more common causes of doors dropping or sticking over time.
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Most internal doors use two or three hinges, but heavier fire doors and external doors are usually specified with three or four to spread the load and meet fire door certification requirements.
Yes – fire doors must be fitted with hinges tested as part of a certified door set, generally ball bearing hinges rated to the door's fire resistance period. See our Door Furniture Guide for more on fire door hardware.
This is usually a sign the hinges are undersized for the door's weight, worn out, or that the fixing screws have loosened over time. Upgrading to ball bearing hinges often resolves the problem on heavier doors.
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