London & selected surrounding areas  ·  6-month workmanship guarantee
Urgent Plumbing & Locksmith Help020 3831 5477
key
Locksmith • The Property Notebook

uPVC Window Lock Repair: Handles, Locks and When to Replace

A uPVC window lock repair is usually quick when the fault is a loose handle, a worn lock or a window that has dropped. Also, here is how to tell which, and what to do next. In addition, we tidy up fully before we leave.

construction
Nobel Build & Repairs
Published 21 October 2026 · Updated 21 October 2026
uPVC window lock repair - locksmith servicing a window lock with a tool roll in London
Locksmith Guide
4 steps
bolt
At a glance

The short answer

For a uPVC window lock repair, the problem is almost always one of four things: a loose or worn handle, a failing lock mechanism, a window sash that has dropped so the locking points no longer meet the keeps, or a broken key lock. Also, most of these can be repaired on site without replacing the window. Furthermore, there is no obligation to go ahead once you have the price.

If the window will not close or lock, it is also a security risk, so it is worth fixing quickly. Also, the table below shows what each fault usually feels like. In addition, still stuck with upvc window lock repair? Furthermore, call Nobel Build & Repairs on 020 3831 5477. In addition, we give you a written price before any work starts. Also, we are happy to answer follow-up questions after the visit.

01
The details

Why won't my uPVC window lock? The four common causes

What you noticeLikely causeUsual fix
Handle is loose or spins freelyFixing screws have worked loose or the spindle is wornTighten or replace the handle
Handle is stiff or will not turn fullyMechanism is worn or the sash has droppedAdjust hinges and keeps or replace the lock
Window will not close fully against the frameSash has dropped or keeps are out of lineRe-align the sash and keeps
Key will not turn in a locking handleWorn lock barrel or lost keyReplace the locking handle
Window can be pushed open when lockedLocking points are not engaging the keepsAdjust or replace the locking points
02
The details

What you can safely check yourself

  1. Look at the gap. Close the window and look at the gap around the frame. If it is uneven, the sash has probably dropped.
  2. Tighten the handle. Check the two fixing screws under the handle cover and tighten gently.
  3. Check the keeps. Look for shiny rub marks on the keeps. Marks on one edge mean the locking points are catching.
  4. Do not force it. Forcing a stiff handle is the most common way a lock breaks. If it will not turn, stop.
03
The details

When you need a locksmith for window lock repair

Call a locksmith if the handle feels loose after tightening, if the lock grinds or sticks, if the window can be pushed open while locked, or if the key will not turn. In fact, ground-floor and escape windows are the priority, because a window that cannot be secured is an easy way in. Also, our locksmiths carry common handles and locking mechanisms, so most repairs are finished in one visit. Furthermore, our engineers explain the work in plain English before they begin.

04
The details

What does a uPVC window lock repair cost?

The price depends on the fault. Furthermore, re-aligning a dropped sash or tightening a handle is a small job, while replacing a locking handle or a full window mechanism costs more because of the parts. In addition, several windows done in one visit usually work out cheaper per window. Also, we give a fixed written price before we start, so you know the cost before any work begins.

05
The details

How to stop uPVC window locks failing again

A little regular care goes a long way. Wipe the frames and keeps, put a drop of light lubricant on the moving parts once a year, and avoid hanging heavy items on open sashes. In addition, if a handle feels loose, tighten it early rather than waiting for it to fail. Also, every job comes with our 6-month workmanship guarantee. Also, you can call 020 3831 5477 at any time to talk it through.

06
The details

Further reading and trusted sources

Useful independent sources: Master Locksmiths Association and British Standards Institution. Furthermore, see also our guides to why a uPVC door will not lock and BS 3621 locks.

07
The details

uPVC window lock repair: what to expect from us

If a uPVC window lock repair is on your list, Call 020 3831 5477 and we will explain the likely cause and give a written price before any work starts. In fact, we attend across London and the Home Counties, and every repair carries a 6-month workmanship guarantee.

08
The details

Why choose Nobel Build & Repairs for upvc window lock repair

Our locksmiths fix uPVC window and door locks every week. Also, we quote a fixed written price first, tidy up after the job and guarantee our work for six months.

menu_book
Your questions

A few common questions

How do I know if my uPVC window lock needs repair or replacement?expand_more

If the handle is loose, a tighter fix may be enough. Furthermore, if the lock grinds, the key will not turn or the window can be pushed open while locked, the mechanism is usually worn and needs replacing.

Can a locksmith fix a uPVC window that will not close?expand_more

Yes. In addition, A window that will not close is often a dropped sash or misaligned keeps, which a locksmith can adjust on site.

More upvc window lock repair questions answered

Is it safe to leave a window lock broken?expand_more

It is best not to. Also, A window that cannot be locked is a security risk and can also invalidate some home insurance conditions, so repair it quickly.

Do you repair window locks the same day?expand_more

We aim to attend quickly and most window lock repairs are completed in one visit, depending on the parts needed.

Do you cover my area for uPVC window lock repair?expand_more

We cover London and the Home Counties, about 50 miles from the centre. In fact, call 020 3831 5477 to check your postcode.

A clearer next step

Need a plumber or locksmith?

Nobel Build & Repairs is CHAS accredited, SafeContractor approved and Constructionline Gold. In fact, we agree a written price before work starts and guarantee our workmanship for 6-months.

Leave a Reply

Your email address will not be published. Required fields are marked *