Streatham COMMON LOCKSMITH
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Locksmith Service

uPVC Door Lock Repair

If your uPVC front door is dropping on its hinges, your handle is lifting but nothing is locking, or you have come home to Streatham Common to find the door simply will not engage, the fault almost always lies with the multipoint locking mechanism hidden inside the door slab. These mechanisms — sometimes called gearboxes — do a remarkable amount of work every single day, and the constant compression and release of multiple steel hooks, bolts and rollers eventually causes them to wear, seize or snap internally. Streatham Common Locksmith is a 24/7 mobile service covering Streatham and the surrounding SW16 postcode district, and our trained, insured technicians carry a wide range of replacement gearboxes and euro cylinders in the van so that most uPVC door lock repair jobs are completed in a single visit.

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Open 24 hours, 7 days a week · Fully insured

[3] What sets a genuine uPVC specialist apart from a general handyman is knowing exactly which symptom points to which failed component. A handle that travels but produces no resistance usually means the gearbox cam follower has sheared. A door that locks at the top and bottom but not at the middle indicates a broken central latch bolt. A key that turns freely without throwing the hook bolts points straight to the cylinder or the cam that drives the mechanism. We diagnose first, explain what we have found, give you a clear up-front quote — with no surprises on the bill — and then carry out the work, aiming to leave the door in better condition than we found it.

What we do

Available 24/7

Day, night, weekends and bank holidays — a real local locksmith answers and sends a fully-stocked van.

We come straight away

Based in Streatham, we send a locksmith straight away — we're usually with you in about 30 minutes.

Fully insured

Vetted locksmiths, a clear price on the phone, and no surprise add-ons when we arrive.

Damage-free entry

We pick and bypass locks the right way, so most lockouts are solved without drilling anything.

01

How uPVC Multipoint Locks Fail — and Why Streatham Doors Are Especially Vulnerable

A standard uPVC door on a Streatham terrace or ground-floor flat typically uses a multipoint mechanism that stretches the full height of the door edge. When you lift the handle, a central gearbox drives a series of shoot-bolts, hook bolts and a main latch simultaneously. That is elegant engineering, but it means a single failed component inside the gearbox can render the entire lock inoperable. Cold winters followed by warm summers cause the door slab to expand and contract slightly; on older properties along Streatham High Road or the period conversions near Streatham Common station, doors that were originally hung perfectly can develop a slight drop over time, placing the mechanism under stress it was never designed to handle. That stress accelerates wear on the gearbox's internal nylon and steel parts until something gives.

[4] The most common faults we attend in this area are: a snapped or stripped gearbox cam (the rotating part that connects handle movement to the bolt system); worn or cracked hook bolt carriers that allow the hooks to drop out of alignment; a seized central deadlock driven by a compromised euro cylinder; and broken shoot-bolt rods — the slim connecting rods that run up and down the door edge. Patio and French doors, which slide or swing open repeatedly in garden-facing flats and houses off Streatham Vale, also suffer from roller-cam wear and misaligned keeps in the door frame, which can make the door lock feel stiff or completely immovable. Identifying the correct fault quickly is what allows us to source the right replacement part and complete a proper uPVC door lock repair rather than simply swapping parts at random.

upvc door handle lock — Streatham Common Locksmith
02

uPVC Door Lock Repair and Replacement: What the Work Actually Involves

When one of our mobile locksmiths arrives — usually within about 30 minutes of your call — the first task is a systematic diagnosis. We check handle operation, test the euro cylinder independently, inspect the faceplate shoot-bolts for movement, and examine the door alignment against the frame and keeps. On most uPVC front and back doors, the gearbox sits behind the faceplate and is accessed by removing a row of screws along the door edge; no cutting, no drilling, and no damage to the door itself in the vast majority of cases. We always aim to work damage-free wherever the condition of the existing hardware allows. Once we have confirmed the failed component, we match the replacement gearbox to the existing mechanism — measuring the backset, the distance between centres, the case height, and the type of cam drive — because fitting an incompatible unit is a common cause of callbacks that we work hard to avoid.

After fitting the new gearbox or replacing a failed shoot-bolt assembly, we also check and adjust the euro cylinder. On many doors in Streatham we find the original cylinder is a standard chrome unit with no anti-snap protection, which leaves the door genuinely vulnerable to a technique that takes seconds with the right tool. Upgrading to a TS007 3-star anti-snap cylinder at the same time as a gearbox replacement is a sensible step and one we always flag up clearly so you can make an informed decision. For sliding patio doors, the work differs slightly — the sliding door lock replacement often involves removing the entire internal chassis from the door frame, replacing the roller-cam assembly or the hook bolt carriers, and then resetting the multipoint keeps in the frame to ensure the door pulls in squarely and locks under proper compression. If you need our help with any of this, call 020 4530 9860 — we answer 24/7, every day of the year including bank holidays.

brass door lock british — Streatham Common Locksmith
03

Front Doors, Back Doors and Patio Doors: Matching the Right Fix to the Right Door

Front doors on Streatham's post-war semis and Victorian terraces converted into flats come in a wide variety of uPVC profiles — Rehau, Veka, Eurocell and others — and each manufacturer's door uses a slightly different gearbox geometry. We carry stock from leading mechanism suppliers to cover the most common case heights and centre distances so that door lock installation on a straight swap takes the shortest possible time. For composite front doors with a timber or GRP outer skin over a uPVC subframe, the mechanism is essentially the same as a standard uPVC door, but the door is heavier, so alignment and compression adjustment on the keeps is critical to avoid premature gearbox wear recurring.

Back doors and garden-facing patio doors present a different set of challenges. Many Streatham properties have a uPVC back door that doubles as the main access to the garden and is used far more frequently than the front door. Constant use means the gearbox wears faster, and we regularly attend these doors to find the cam follower has sheared after years of daily cycling. Sliding patio doors — common in the ground-floor flats and bungalows around Streatham Common itself — often develop a fault where the door slides freely but will not lock down because the hook bolts cannot engage the keeps. This may need a sliding door lock replacement, or it may simply require the keeps to be repositioned and the door rollers to be adjusted. We assess both possibilities before recommending a course of action, and we confirm the exact cost before starting any work.

brass door lock british — Streatham Common Locksmith
04

Pricing, Timing and What to Expect When You Call Us

We operate as a mobile locksmith service — there is no shop, we come directly to you — and the final quote for any uPVC door lock repair job depends on a small number of clear factors: the type of door and mechanism involved, the specific parts required, the time of day your call comes in (evenings, weekends and bank holidays carry a different call-out charge to standard daytime hours), and your location within our coverage area. We confirm all of this on the phone before anyone sets off, so you know exactly what you will be paying before we arrive. There are no hidden extras added once the work is under way. As a 24 hour locksmith London service, we respond to calls at any hour — whether it is a midday gearbox failure on a residential back door or a late-evening lockout after a jammed front door mechanism gives up entirely. Our technicians are trained, experienced, and fully insured, and they carry the diagnostic tools and replacement stock to handle most jobs on the first visit. For anything urgent in the Streatham area, call 020 4530 9860 and we will send someone straight away.

yale lock front door — Streatham Common Locksmith

Frequently asked questions

How do I know whether my uPVC door needs a new gearbox or just a new cylinder?

The quickest way to tell is to try operating the handle with the door open and unlocked. If the handle lifts smoothly and you can see the shoot-bolts and hooks moving correctly, the gearbox is probably fine and the fault is in the cylinder or the cam that connects the cylinder to the gearbox. If the handle lifts but nothing moves — or it feels loose and springless — the gearbox cam follower has likely sheared and the gearbox itself needs replacing. Our technicians run through this diagnostic on every visit before recommending parts, so you are never paying for a component you do not need.

Can you repair a uPVC patio door that slides but will not lock?

Yes, this is one of the most common sliding door lock replacement jobs we carry out in Streatham. When a patio door slides freely but the hook bolts will not drop into the keeps, the cause is usually one of three things: the keeps in the frame have shifted slightly, the hook bolt carriers inside the door chassis have worn or cracked, or the roller-cam assembly that drives the hooks is no longer rotating fully. We inspect all three before quoting, because repositioning keeps is a much simpler job than replacing the internal chassis, and we will only recommend the more involved repair if it is genuinely necessary.

What factors affect the cost of a uPVC door lock repair in Streatham?

Several things go into the final quote: the type and age of the existing mechanism (some older gearboxes require sourcing a less common case height or centre-to-centre distance), whether the cylinder also needs replacing (and which grade of anti-snap cylinder you choose), the time of day you call — evenings, weekends and bank holidays attract a different call-out charge to standard hours — and your distance within our coverage area. We go through all of this on the phone before we set off, so you receive a confirmed price before any work begins. There are no additional charges added on the doorstep.

My front door handle has dropped and I cannot lock the door at all. Is this an emergency callout?

It is worth calling us straight away on 020 4530 9860 because a door that cannot be locked is a security risk, particularly overnight. A dropped handle usually means the gearbox cam follower or the main latch carrier has failed, and the door cannot be secured until the mechanism is replaced. We operate as a 24/7 mobile locksmith London service and can send a technician to you at any time of day or night. We are usually with you in about 30 minutes of your call, though we cannot guarantee an exact arrival time as it depends on where our nearest technician is at that moment.

Should I upgrade my cylinder when I have the gearbox replaced?

In most cases, yes — and we will always make you aware of the option. Many uPVC doors in Streatham, particularly on properties built before 2015, still have standard euro cylinders that offer no protection against cylinder snapping, which is a quick and silent forced-entry technique. Fitting a TS007 3-star anti-snap cylinder at the same time as a gearbox replacement adds meaningful security at a point when the door is already off the faceplate and the work is straightforward. We explain the difference clearly and leave the decision entirely with you; we will never pressure you into an upgrade you have not asked for.

Do you work on uPVC doors in rented flats in Streatham, and do you need the landlord's permission?

We can work on any uPVC door in Streatham, including doors in rented properties and blocks of flats. As a matter of practice, our technicians will ask for confirmation that you have the right to authorise work on the door — this protects both you and us. If you are a tenant, it is worth letting your letting agent or managing agent know that the mechanism has failed, particularly if the fault is wear and tear rather than accidental damage, as the repair cost may be their responsibility under the tenancy agreement. If the situation is urgent — for example the door cannot be locked or you are locked out — call us immediately on 020 4530 9860 and we can discuss the ownership situation on the phone before anyone sets off.

Locked out or need a lock fixed? We are on the way.

020 4530 9860