Types of locks
Mortice lock
A mortice lock is integrated into a recess cut into the door thickness. It is also known as a mortised lock or in-situ lock.
THE KEY POINT TO REMEMBER
These three designations describe the same installation principle. They do not indicate three levels of security.
A discreet mechanism within the door
The lock case is recessed into the door. The faceplate is visible on the door edge when it is open, while the handles and keyway remain accessible on the door faces.
This installation maintains a discreet finish. It can apply to an interior door with a cane-shaped hinge, as well as an entrance door with a more elaborate closure mechanism.
Single or multi-point
Mortice locks are available with a single locking point or several points linked by rods. Depending on the model, they can be key-operated, lift-to-lock or automatic.
The fact that the lock case is concealed does not guarantee particular resistance to forced entry. The design, any certification, and the quality of installation must be assessed.
What needs to be measured
To find a replacement, first check the backset, centres, lock case and faceplate dimensions. The handle spindle, fixing holes and latch bolt handing must also match.
A mortice lock that appears similar may not fit the existing mortice. On a multi-point lock, it is also necessary to check the positions of the points and their compatibility with the strike plates.
Repair or replace
A handle failure, a defective lock case, and a misaligned door all require different responses. Diagnosing prevents replacing a set that could still be repaired.
When a change is required, a compatible reference limits modifications to the frame. Final tests verify the bolts engage properly and operate smoothly without abnormal effort.
IN IMAGES
MULTISECU ADVICE
Uncertain about your lock?
A photo of the mechanism, along with some details about your door: we help you identify the right solution.