About this service
Window locks fail quietly — a handle that won't turn, a window that won't pull tight, or a stay that lets the sash sag. First Line Locksmiths repairs and replaces window locks across West London, Berkshire and Buckinghamshire: espagnolette gearboxes, cockspur and tilt-and-turn handles, friction stays, restrictors and mushroom cams. Insurance policies often require key-locking window handles on accessible windows, and we fit them to match your existing frames.
What's included
- Espagnolette and shootbolt window mechanisms replaced
- Cockspur, inline and tilt-and-turn handles supplied and fitted
- Key-locking handles fitted to satisfy insurance requirements
- Friction stays and child-safety restrictors replaced
- uPVC, aluminium and timber windows covered
Our process
Identify the gear
Handle type, spindle length and gearbox pattern photographed and matched.
Strip the sash
Beading and sash removed carefully so the mechanism can be lifted out without damaging the frame.
Fit and adjust
New gear fitted and mushroom cams adjusted for a weather-tight compression seal.
Test every window
We check the rest of the windows free of charge and flag any about to fail.
Where we cover
We provide window locks across West London, Berkshire and Buckinghamshire, including:
