The lock is one of the key security components of your shop or home. When it is damaged or outdated, replacing it becomes a priority. Good news: the process follows a few simple steps.

Why replace a metal shutter lock?

Better security: ageing locks become less effective; a modern mechanism strengthens protection against intrusion.
Wear and tear: frequent use, weather and dirt wear out the mechanism. A key that is hard to insert is a warning sign.
Moving premises: when taking over new business premises, change the lock as a precaution.
Upgrading: recent models offer anti-picking cylinders and connected locks.

The 4 replacement steps

Choose the right lock: go for a robust lock, ideally A2P certified, compatible with your shutter type (manual or motorised).
Remove the old lock: unscrew the existing mechanism and remove the components patiently so as not to damage the shutter.
Fit the new lock: insert the cylinder into its housing and fix it firmly; some models require adjusting the locking mechanism.
Test it: check the key inserts easily and the lock works smoothly over several cycles.

The different types of locks

Mortice lock: built into the shutter housing, discreet security.
Surface-mounted lock: fixed on the outside, more visible and harder to force.
Electric lock: for motorised shutters, remote locking.
High-security key lock: reinforced resistance to picking and drilling.

How much does it cost?

Expect around €150 for a standard 3-point lock and up to €350 for a top-of-the-range model. The job usually takes between 30 minutes and 1 hour.

Should you call a professional?

With the right tools and some DIY basics, you can do the swap yourself. But a qualified locksmith guarantees a correct, secure installation with advice matched to your needs and budget. If in doubt, call our team: fast call-out throughout Île-de-France.