Multipoint lock: how it works, should you install one?

If you want to strengthen your door without replacing it, the multipoint lock is often the best answer. It's one of the things we install most in Brussels to take a door from "ordinary" to one that genuinely resists break-ins. Here's how it works, and how to tell whether it suits your door.

The principle: locking over the full height

A standard lock only secures the door at a single point, at the cylinder. Under the pressure of a crowbar, that single point gives way and the door springs open. A multipoint lock, on the other hand, drives several bolts simultaneously — at the top, centre and bottom of the door — when you turn the key. The force of a break-in attempt is then spread over the full height, which makes forcing the door open far harder.

3, 5 or 7 points: which to choose?

• 3-point lock: the standard for an apartment. A central point + a top point + a bottom point. A very good level for a landing door.
• 5-point lock: recommended for a house or an exposed door (ground floor, isolated access). More anchor points, so more resistance.
• 7-point lock: the top tier, often paired with armoured doors. For the highest security requirements.

In practice, the right choice depends on the type of door, its exposure and the level of protection you want. During a visit, we assess these criteria with you, without over-specifying unnecessarily.

Mortise or surface-mounted multipoint?

Two main families exist:

• Mortise lock (recessed): built into the thickness of the door, discreet and neat. Ideal when renovating a compatible existing door.
• Surface-mounted lock: fixed to the inner face of the door, very robust, often used as reinforcement or on older doors.

We work with reference brands such as Fichet, Bricard and Picard, whose multipoint locks are recognised for their resistance to break-ins.

The cylinder matters as much as the points

Beware of a common misconception: a multipoint lock fitted with a low-end cylinder remains vulnerable to picking or drilling. The locking points protect against force (crowbar); the cylinder protects against manipulation (picking, bumping). The two are complementary. To choose the cylinder well, see our guide on choosing a security lock.

On which doors can it be installed?

A multipoint lock can be fitted on most front doors in good condition (wood, PVC, aluminium, metal). If the door or frame are fragile, we often combine it with door reinforcement to tie the door-and-frame assembly together. It's also a key burglary-prevention measure, and a point regularly required by insurers.

How long and how much does it cost?

Installing a multipoint lock generally takes 1 to 2 hours depending on the door and the model. The price depends mainly on the number of points and the brand. As with any job, we quote the price before starting — see our guide on the cost of a locksmith in Brussels.

Want to know whether a multipoint lock suits your door? A technician comes by in Brussels or Brabant to assess and advise. Call 0495 205 400.