Types of locks
The rim lock
A rim lock features a lock case mounted to the surface of the door, typically on the interior side. Its mechanism remains visible, unlike that of a mortice lock.
THE KEY POINT TO REMEMBER
Visibility does not mean less secure: resistance depends on the model, its anchors, and the door.
Identifying this type of installation
The lock case is mounted on the door leaf and the strike is fixed opposite it on the frame. Depending on the version, a handle or pull control retracts the latch bolt.
This arrangement is useful in renovation, particularly when the door cannot accommodate a mortice lock case. The available space and strength of the fixing surface must still be checked.
Single-point, multi-point or full-length covered
A single-point lock secures at a primary location. A multipoint model controls multiple bolts and may feature visible hinges.
When a casing covers the mechanism and the hinges, it is known as a full-length covered multipoint lock. It remains a surface-mounted lock. The casing enhances finish; security performance must be assessed separately.
The advantages and limitations
The lock case remains accessible for certain maintenance operations, and installation may avoid cutting a mortise in the door. Finishes and shapes allow adaptation to different interior designs.
The box volume, the handle clearance, and the frame constraints must be considered. A lock cannot be selected solely because it appears to fit the door.
Selecting a compatible lock
Check the handing, backset, lock case dimensions, cylinder length and strike type. For a multipoint replacement, operating rod positions and fixing points also matter.
Installation must ensure smooth operation without pulling or lifting the door leaf. For a reinforcement project, a full assessment of the door and its hinges is required alongside the lock analysis.
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.