Replacing the lock on a wooden door? Timber front, back and internal doors usually use a mortice lock fitted into the edge of the door. We stock ERA mortice locks: the ERA Fortress 5 lever British Standard sashlock, a 3 lever sashlock, a 3 lever deadlock and a bathroom sashlock.
Match the lock type, case size and backset of your existing lock so the new one fits the same pocket in the door.
A sashlock has a latch worked by the handle plus a key-operated bolt. A deadlock has only the bolt.
Measure the height of the lock case on the door edge and its depth into the door. 64mm (2.5in) and 76mm (3in) cases are common.
From the edge of the door to the centre of the keyhole. Measure the old lock rather than the door.
5 lever British Standard locks are the usual choice for external doors. 3 lever locks suit internal doors.
A bathroom sashlock has a latch and a thumbturn bolt instead of a key, so the door can be locked from inside for privacy.
Remove the handles and spindle, undo the two screws in the faceplate and ease the lock out of the door. Slide the new lock in, refit the screws, spindle and handles, and check the latch and bolt line up with the keep on the frame.
Usually not. uPVC and composite doors use multipoint locks. Sashlocks are mainly for timber doors.
A mortice lock with five levers inside, which makes it harder to pick. British Standard 5 lever locks are often required by home insurers for external doors.
Browse all uPVC door locks: multipoint locks, gearboxes, keeps & latches, sashlocks and garage locks.
Not sure which mortice lock you have? Send us a photo of the lock faceplate with a tape measure in shot, and we'll match it for you.
Send us a photo to identify your partMonday to Friday, 8:30–12:30 and 13:00–15:30
