Multipoint lock
A multipoint lock is a locking mechanism that drives several bolts or cams around the perimeter of a sash or door panel from one handle. A European tilt and turn window typically has 4-8 or more points, against one or two latch points on a standard US casement or double-hung.
A single latch holds a sash shut at one spot. The rest of the sash edge floats against its weatherstripping, and a wide or tall sash can bow away from the seal between the latch and the corners. A multipoint lock fixes that by locking in many places at once.
A continuous locking bar, called an espagnolette, runs around the edge of the sash. One handle moves it. Along the bar sit cams or bolts that engage strike plates on the frame, and as they lock they pull the sash tight into a compression gasket around the whole perimeter.
Multipoint vs. single latch
| Multipoint lock | Typical US latch | |
|---|---|---|
| Locking points | 4-8 or more, by sash size | 1-2 |
| Sealing | Even compression around the perimeter | Pressure at the latch, wipers elsewhere |
| Operation | One handle for lock, turn and tilt | Latch plus a separate sliding or lifting motion |
| Adjustment | At hinges and strikers | Limited |
| Security | Resists prying at many points | Weakest at the latch |
Why it matters on a spec
- Air and water. Even gasket contact is what keeps air infiltration low and stops wind-driven rain on tall sashes.
- Security. Many points are harder to pry than one. Security classes such as RC2 are rated on the whole hardware set.
- Large glass. Heavy sashes need the load shared, which is why hardware is matched to sash weight before production.
Multipoint locks are standard on the tilt and turn windows and lift-and-slide doors I source, in every frame material. The hardware is covered by the 10-year written warranty. For the full mechanism, parts and adjustment steps, see European tilt-and-turn hardware explained. To see which systems fit your schedule, start with the estimator.
Common questions
- How many locking points does a window need?
- It depends on the sash size. A small tilt and turn sash may have four points. Taller or wider sashes get intermediate points so the gasket cannot bow between them. The system provider sizes the hardware to the sash weight and dimensions, so the count follows from the schedule.
- Can multipoint hardware be adjusted after installation?
- Yes. Quality hardware has adjustment points at the hinges and strikers, usually with a hex key, for sash height, lateral position and compression against the gasket. A check after the first seasonal change is good practice.
Used in