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uPVC doors and windows can fail in small ways at first. A handle starts feeling stiff. A window will not close properly. A door needs lifting before the lock engages. Over time, these small faults can turn into a bigger access or security problem.
JW Security provides uPVC door repair in London for homes, flats, landlords, and managed buildings where doors, windows, locks, handles, hinges, or mechanisms need attention.
We deal with multi point locking systems, failed gearboxes, jammed handles, dropped doors, worn hinges, window locks, and double glazing related faults where the frame, handle, or locking system is no longer working as it should.
The aim is to repair the fault where possible before recommending replacement. If a part has failed, we explain what has gone wrong and what needs to be changed.
We repair and replace common uPVC door and window parts, especially where the locking system, handle, hinge, or mechanism has stopped working correctly.
Our tools and techniques are specifically designed for high-precision adjustments and repairs on modern multi-point systems.
uPVC door repair in London for jammed locks, failed gearboxes, stiff handles, and multi point systems that no longer engage properly.
uPVC window repair in London for broken handles, faulty window locks, seized mechanisms, and windows that no longer open or close smoothly.
Replacement locks, cylinders, handles, and security hardware for uPVC doors and windows where the existing parts are worn, damaged, or outdated.
Fast help for uPVC doors or windows that cannot be locked, opened, closed, or secured properly.
uPVC mechanisms often fail because parts wear, shift, or fall out of alignment. Here are some of the common issues we deal with.
Door lock sticking or jamming
Mechanism adjustment, lubrication, or gearbox repair where the lock is stiff or hard to operate.
Window handle not engaging or turning freely
Repair or replacement of window handles, espagnolette mechanisms, and locking parts.
Handle lifting required to engage door locks
Realignment of the multi point locking system and adjustment of hinges or gearbox parts.
Door not closing properly
Hinge adjustment, frame checks, and lock alignment to help the door close and secure correctly.
Window will not open or shut
Checks for seized hinges, faulty locks, damaged handles, or failed internal window mechanisms.

Our techniques are compatible with all major industry manufacturers and balcony door specialists.
* And many others. Contact us for any non-listed brands.
Contact our specialists for fast diagnosis and repair. We provide emergency services and free quotations for all UPVC door and window lock issues.
Get A Free ConsultationNeed urgent help instead of a planned survey? Call our emergency team for urgent access or security help.
Call Our Emergency Hotline
0208 646 7931