A dead lock uses a key-operated bolt to secure the door and does not include the spring latch used by lever handles.
Deadbolt Protection for Timber Doors
Dead locks secure a door with a key-operated bolt and no sprung latch. They are commonly used where separate handle furniture controls the door, or as an additional locking point on a timber entrance door.
Measure the case depth, backset, faceplate and keep position before replacing an existing lock. External security requirements may call for a certified model, so check the door specification and insurer conditions. Other mechanisms are available in the locks and latches range.
A clean, accurately sized mortice supports the lockcase without weakening the stile. Coordinate the keyway with suitable keyhole escutcheons, and check that the door hangs correctly on firm door hinges before positioning the keep.
Dead Locks FAQ's
A mortice deadlock sits within the door edge and is locked manually. A night latch is usually surface mounted and latches when the door closes.
Measure the case depth, backset from the faceplate to key centre, faceplate dimensions and bolt position.
Many insurers ask for BS3621-rated locks on timber entrance doors. Check the specific policy before selecting hardware.
A like-for-like replacement may be manageable, but new morticing and security-critical external work require accurate fitting and may suit a locksmith or joiner.