Window lock services
Window Lock Repair and Replacement in Boston
Call with your postcode for a current arrival estimate.
- 24-hour emergency cover
- No call-out charge
- Price agreed before work starts
Window Will Not Lock, or the Handle Has Broken?
Big Locksmiths Boston repairs and replaces window locks, handles and mechanisms across Boston, on uPVC, aluminium and timber windows. A window that will not lock is almost always a hardware fault, not a glass fault, so it is a repair and not a new window.
The usual complaints are a handle that is loose or spins, a handle that turns but locks nothing, and a window stuck shut. There is no call-out charge.
The Lock or the Window: Which Is at Fault?
Every window lock is a set of connected parts, and a problem in one can affect the handle, the opening sash or the locking points. So is it the lock, or the window? One gentle check with the sash standing open usually narrows it down.
When it locks fine with the sash open
If the window opens normally and the handle moves freely, the locking points may not be meeting the keeps on the frame. Hinges wear and the sash drops; keeps drift and need adjustment. Inspection confirms whether the window needs realigning or something else is involved.
It fails with the sash open too
A loose, stiff or useless handle suggests a fault within the hardware: the handle, spindle, gearbox or locking strip. An inspection identifies which, and if a component must be replaced, compatible options are discussed with you first.
The result can indicate hardware or alignment, which helps decide on an adjustment, an individual replacement part or a compatible replacement mechanism. The fault may lie in the handle, the locking mechanism or how the window sits within the frame, so the whole window may not need replacing, even though right now it leaves your property less secure.
Stop if the handle or key needs force at any point; do not force a stiff one. If a component goes loose, bends or takes excessive force, stop using the window. On the phone, tell us whether it is stuck, difficult to close or no longer locking securely; these details help us understand the problem and arrange an inspection.
Urgent help: if a ground-floor or otherwise accessible window will not secure, ring us now.
What Is Your Window Actually Doing?
You do not need the trade names to describe a window fault. Pick the symptom closest to yours below and tell us when you call; it covers the usual problems with handles, mechanisms and alignment, and everything is still inspected before the required work is confirmed.
The handle spins, or is loose or wobbly
Likely causes are loose fixings, a worn spindle or damage within the handle. In some cases a replacement handle fixes it outright, but the locking mechanism is checked as well before the repair is confirmed.
The window will not lock though the handle turns
When the spindle, gearbox or locking strip fails, the handle can move without operating the locking points. The window may seem closed but remain unsecured, so an accessible window should not be left this way.
The window is stuck shut, so it will not open
The likely cause is a jammed handle, gearbox or locking strip stopping the sash from opening. Please don't force the handle or pull on the frame; that only strains the hardware. Inspection identifies what has jammed and confirms how to open it safely.
The window will not close properly
The sash may have dropped or shifted out of alignment. Hinges that have worn or keeps that sit wrongly can stop it closing and locking. That often means adjustment, not a new lock, while forcing it adds strain to the hardware.
In the handle, the key will not turn
The key could be worn or damaged, or the little lock inside the handle may have failed. Try an undamaged spare, but do not force either key. On some windows the locking handle is replaced as one unit, with new keys.
Urgent help: if an accessible window will not secure,.
Parts That Fail on a uPVC Window
When a window stops locking, the hardware is the first place to look. On a uPVC window that hardware comes down to four groups of parts, each with its own way of failing.
The handle and the spindle
The handle is simply the part you turn, joined by a square metal spindle to the mechanism in the sash. If fixings work loose, the spindle wears or the handle is damaged inside, the lock may not operate. Where the fault stops there, that component may be the only replacement needed.
The gearboxes
Sitting behind the handle, the gearbox carries the handle's movement to the locking mechanism. When faulty, it makes the handle stiff, lets it spin without engaging or stops the locking points moving. It is replaced separately or with the strip, as the design dictates, matching the existing dimensions and mechanism.
The espagnolette strip
The espagnolette ("espag") is a metal strip on the edge of the opening sash, carrying the locking points that engage the frame; a related shootbolt system is found on some windows. If it becomes bent, worn or jammed, it may prevent the window from opening or locking. Compatibility with the window’s dimensions and existing hardware must be ensured when choosing the replacement.
Hinges and keeps
Friction hinges support the sash and affect how it sits in the frame; keeps are the metal components receiving the locking points. Worn hinges or wrongly positioned keeps stop it closing and locking smoothly. Problems with the wider window may require a window specialist.
Next, tell us whether it is stuck, difficult to close or unable to lock, what the handle or key does, and the open-sash result if completed safely. From your description, we price the work on the call; it stands unless the job differs on site, with changes explained before we start. The agreed adjustment, repair or replacement follows, tested with you where practical. Window-lock work suits a planned appointment; where an accessible window cannot be secured, call about current urgent availability.
[DEVELOPER NOTE — remove before publication: use an original labelled diagram showing the handle, spindle, gearbox, espagnolette strip, locking points, keeps and friction hinges.]
Lost Your Window Key?
You may not need a locksmith to replace a lost window key. Many locking window handles use common, identifiable key patterns rather than a key unique to your window, so if the handle and pattern can be identified, a replacement key may well be available. A code stamped on a surviving key or on the handle can help pin down the right one, though availability depends on the handle, the key pattern and the supplier. Resist trying a similar-looking key: it may not match the internal pattern and could damage the handle.
Replacing the whole locking handle makes more sense when the correct key cannot be sourced, when the existing lock is damaged or unreliable, when the handle itself has stopped working, or when you want keys you can no longer account for to stop operating the window. A compatible replacement handle can be supplied with matching new keys, so the old ones simply stop working.
Window Locks and Home Insurance
Do your window locks affect your cover? They can. Some policies specify key-operated locks or other security measures on accessible windows, such as those on the ground floor or reachable from a flat roof, balcony or extension, but requirements vary. For confirmation of what applies to your property, consult your policy wording or contact your insurer. When a window no longer locks, its key will not turn or the handle has stopped operating the mechanism, tell us what is happening and pass on the written requirement. Depending on the fault, we may adjust, repair or fit a compatible replacement component, and we can assess the window and explain whether a suitable key-operated locking handle or window lock can be fitted. Your insurer alone can confirm whether the installation meets your policy requirements. For door locks, see BS 3621 and insurance-approved locks explained.
No New Window Is Needed
It is easy to assume a window that won't lock needs replacing, and the first call often goes to whoever installed it. But a window that will not lock, open or close properly does not always need replacing. What matters is whether the fault is in the locking hardware or the wider window structure, because the two belong to different trades: glazing companies replace windows, and locksmiths repair the hardware that secures them.
Typical hardware faults are a handle that is loose, broken or spinning, a key or handle that no longer operates the locking points, a gearbox or locking mechanism that is stiff or jammed, locking points that do not engage the frame, and a minor alignment problem affecting the lock. An adjustment, a repair or the fitting of a compatible replacement part may resolve these issues.
The honest exception: when the glass or sealed unit is damaged, the frame is cracked or badly distorted, the sash has structural damage, the misalignment is severe enough to fall outside the locksmith's scope, or repairing the hardware would not resolve the wider problem, you need someone else. A glazier normally handles glass and sealed-unit faults; a window specialist may be required for structural frame or sash work.
If you are not sure, we assess the fault and explain whether it falls within our window-lock service. Should another trade suit it better, we will say so before any work is agreed.
Locksmith pricing
Window Lock Repairs Across Boston
We repair and replace window locks for homeowners, landlords and businesses across Boston.
Most of this work is booked ahead, and several windows are usually dealt with in a single visit, since a house rarely has just one failing. Visits cover Staniland, Bargate, Trinity, Skirbeck, Wyberton and Haven Village, and every postcode in PE21 and the parts of PE20 around Boston. Housing is mixed: 34.1% of households are in detached houses, 33.1% semi-detached, 17.2% terraced and 15.3% in flats (Census 2021, ONS).
See all areas we cover, or read about window locks.
What affects the cost?
Service required, time of attendance, lock and door type, labour and parts.
The Job: How It Works
Three steps, each kept simple:
- Describe what the window is doing, including whether it locks normally when the sash is open.
- We identify the part that has most probably failed and tell you the price.
- The repair is finished and the window is tested for opening, closing and locking.
Because window faults are seldom urgent, these jobs are generally booked ahead. If a ground-floor window will not lock, call straight away: we take calls 24 hours a day and never charge for the call-out.
Locksmith pricing
What Is the Cost of a Window Lock Repair?
Most window lock repairs cost a fraction of a new window, but the exact figure depends on the fault, the affected component and the work required. Different parts and labour are needed for each of these faults: a loose handle, an alignment issue or a failed locking mechanism. As a rule of thumb, a handle is normally the least expensive fix, a gearbox comes next and a full espagnolette strip replacement is the most involved.
Window not locking properly? Describe what it is doing and share clear photographs if we ask. The open-sash check helps, since it shows whether an adjustment may solve the problem. We use the details you give us to price the job during the call. That price remains unless the job on site turns out different; we explain any change and agree the work before the repair begins. We assess lock and alignment problems on uPVC, aluminium and timber windows and explain the repair and replacement options. You will not pay a call-out charge. On billing generally, you pay for the work carried out, any parts needed, and VAT; rates outside Monday to Friday, 7am to 6pm, are higher, but the call-out itself is never charged.
If a window lock has become faulty or unreliable, tell us about the problem and how many windows are involved.
Fault type
– adjusting alignment is different work from repairing a jammed mechanism.
Affected part
– handle, gearbox or wider locking mechanism will each change the price.
Parts
– older or discontinued hardware may take longer to identify or need a suitable alternative.
Windows
– tell us how many need attention so they can be considered together.
Emergency and planned locksmith services
Book a Window Lock Repair in Boston
Ring 01205 601044 to book a time that suits you, and have every window that is giving trouble ready, as several can usually be done in one visit. There is no call-out charge, and the price is agreed before work starts.
- Phone: 01205 601044
- Booked work: Monday to Friday, 7am to 6pm
01205 601044
Frequently Asked Questions
Does a broken window lock mean I need a new window?
Not necessarily, and for most broken window locks the answer is no. When the glass, sealed unit and frame are still in suitable condition, the trouble may be limited to the handle, spindle or locking mechanism. Those parts can be adjusted, repaired or replaced. Inspecting the window confirms which, and also flags the cases where a different window specialist is needed.
How do I know if it is the lock or the window itself?
Open the sash fully, then gently try the handle and lock. A handle that behaves normally suggests an alignment problem: the sash may have dropped or the keeps may need repositioning. A handle that still sticks or fails suggests a hardware fault, perhaps in the gearbox or locking strip. Avoid forcing anything, and pass the result on when you call so we can judge the likely job.
My window handle is loose and spins. Is that expensive to fix?
Usually not. A loose or spinning handle normally comes down to a worn spindle, loose fixings or damage inside the handle, and the handle is often the least expensive part of the window to replace. Sometimes replacing it is the whole repair, although the locking mechanism should be checked before that is confirmed. You are given the price before any work starts.
Can I get a replacement key for my window lock?
Frequently, yes. A lot of window handles share identifiable key patterns, so look for a key code, the handle model or a manufacturer marking, which may help you find a compatible replacement; availability does vary. Where no suitable key can be found, the lock is damaged, or you cannot account for missing keys, a new locking handle with its own keys may be more appropriate.
Do my window locks affect my home insurance?
They might. Some policies specify key-operated locks on accessible windows, typically on the ground floor or reachable from a flat roof, balcony or extension. Requirements vary by insurer and property, so check your policy wording rather than assuming. When a window lock stops working, repairing it promptly matters for your cover as well as security, and only your insurer can confirm what satisfies the policy.
My window is stuck shut. Can you open it without breaking anything?
Yes, as a rule. Most stuck windows have a jammed gearbox, handle or locking strip rather than a problem with the window itself, so they can generally be opened without damaging the sash or glass. Inspection confirms what has jammed and the safest approach. Avoid forcing the handle: that can crack the frame and turn a hardware job into a glazing one.
Can you do several windows in one visit?
Certainly, and it often makes sense. Windows of a similar age tend to develop faults around the same time, so it is worth having them checked together. Tell us how many need attention so the work can be planned as one job. We will point out which windows genuinely need repair now and which are fine as they are.
Should I call a locksmith or a glazier?
The deciding question is whether the hardware or the window itself has failed. Problems with the handle, spindle, lock or multipoint locking mechanism call for a locksmith. Broken glass, a damaged sealed unit or misting between the panes is generally glazier work, and structural sash or frame issues may need a window specialist. We will tell you plainly if your problem turns out to belong to another trade.
Still have a question or need urgent assistance? Call 01205 601044, tell us what has happened and receive a current arrival estimate.