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uPVC Door & Window Lock

B&B Locksmiths provides professional uPVC door and window repairs throughout Oxford and Oxfordshire. If your door will not lock, the handle is stiff, the key will not turn, the door has dropped, or a window is jammed, we can diagnose the fault and recommend the most appropriate repair.

 

We repair and replace multipoint locking mechanisms, gearboxes, euro cylinders, handles, hinges, keeps and window locking mechanisms, with individual components repaired or replaced wherever practical rather than unnecessarily replacing the complete door or window.

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Call 07831 451352 or send us photos on WhatsApp. Photos of the lock, door edge or mechanism can sometimes help us identify the type of hardware involved before attendance.

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uPVC Door Lock Repairs

Most uPVC doors use a multipoint locking system. When the handle is lifted and the key is turned, several locking points engage with keeps positioned along the door frame.

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For the system to work correctly, the cylinder, handles, gearbox, locking mechanism, hinges, keeps and door alignment all need to work together.

 

Common uPVC door problems include:

  • Doors that will not lock or unlock

  • Handles that lift but the key will not turn

  • Stiff or loose door handles

  • Failed or worn gearboxes

  • Jammed locks

  • Failed multipoint locking mechanisms

  • Worn or damaged Euro cylinders

  • Dropped or misaligned doors

  • Locking points not lining up with the keeps

  • Doors that need to be lifted, pushed or pulled before they will lock

 

Similar symptoms can have different causes. For example, a stiff handle may be caused by a fault inside the multipoint locking mechanism, but it can also happen when a door has dropped and the locking points no longer line up correctly with the frame.

 

Continuing to force a stiff handle or key can place additional strain on the gearbox and locking mechanism and may cause further damage.

 

Multipoint Lock and Gearbox Repairs

A failed gearbox or multipoint locking mechanism is a common cause of uPVC door problems.

 

Depending on the fault and the availability of compatible parts, it may be possible to replace the damaged gearbox or another individual component rather than replacing the complete locking system or door.

 

We work with multipoint locking mechanisms and gearboxes from manufacturers including Yale, GU, Lockmaster, Fullex, Mila, Winkhaus and MACO, subject to suitable replacement parts being available.

 

Multipoint locks are manufactured in many different sizes and configurations, so correctly identifying the existing mechanism is important.

 

Where an exact replacement is no longer available, we can assess whether a compatible replacement or alternative repair is possible.

 

Dropped and Misaligned uPVC Doors

A uPVC door that has dropped or moved out of alignment can become difficult to close, lock or unlock.

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You may notice that:

  • The handle is difficult to lift

  • The key becomes difficult to turn

  • The door catches against the frame

  • The locking points do not line up correctly

  • The door has to be pushed, pulled or lifted before it locks

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Replacing a damaged lock component without correcting an underlying alignment problem can place unnecessary strain on the new mechanism.

 

We can check the hinges, keeps, locking points and overall door alignment to identify the cause of the problem before recommending a repair.

 

uPVC Window Repairs

We also repair locking and closing problems with uPVC windows.

 

Window handles, locking strips, espagnolette mechanisms, friction stay hinges and keeps can become worn, damaged or misaligned over time.

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Common uPVC window problems include:

  • Broken or stiff window handles

  • Failed espagnolette or locking-strip mechanisms

  • Worn or damaged friction stay hinges

  • Misaligned locking points and keeps

  • Windows jammed shut

  • Windows that will not open correctly

  • Windows that will not close properly

  • Windows that will not lock securely

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A faulty mechanism or poor alignment can also prevent a window from sealing correctly, potentially leaving it draughty or less secure.

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uPVC Door and Window Replacement Parts

Not every problem requires replacement of the complete door, window or locking mechanism.

 

Where appropriate and suitable parts are available, we can replace individual components including:

  • Multipoint lock gearboxes

  • Euro cylinders

  • Door and window handles

  • Hinges

  • Keeps

  • Espagnolette mechanisms

  • Window locking strips

  • Other compatible locking components

 

We assess the door or window as a whole before selecting replacement parts so that the underlying cause of the fault can be addressed rather than simply replacing a damaged component.

 

uPVC Door Security Upgrades

We can also advise on suitable mechanical security upgrades for uPVC and composite doors.

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Depending on the existing door and locking system, options may include high-security Euro cylinders, stronger door handles and replacement locking hardware.

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Where appropriate, we can advise on independently tested high-security cylinders carrying recognised security ratings such as TS 007 3-star or Sold Secure SS312 Diamond.

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Any replacement cylinder also needs to be correctly sized for the door and handle set so that it does not project unnecessarily beyond the door furniture.

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Correct Diagnosis Before Replacement

Correct diagnosis is important with uPVC doors and windows because the same symptom can be caused by several different faults.

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Before recommending a repair, we can check components such as:

  • Door or window alignment

  • Hinges

  • Handles

  • Keeps

  • Euro cylinders

  • Gearboxes

  • Multipoint locking mechanisms

  • Window locking mechanisms

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Where practical, we assess whether an existing component can be repaired or adjusted to avoid unnecessary replacement.

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uPVC Door & Window Repair FAQs

Can you repair a uPVC door without replacing the whole door?

Yes. In many cases, individual parts such as the gearbox, cylinder, handle, hinges or locking mechanism can be repaired, adjusted or replaced without replacing the entire door.

 

Why does my uPVC door handle lift but the key won't turn?

This can be caused by door misalignment, a faulty gearbox or multipoint lock, incorrectly positioned keeps, or a problem with the cylinder. We can inspect the door and identify the cause.

 

Can you repair a uPVC door that has dropped?

Yes. Dropped uPVC doors can often be corrected by adjusting the hinges, alignment and locking keeps so the door closes and locks correctly.

 

Can you repair a uPVC window that is jammed shut?

Yes. We repair jammed uPVC windows, including faults with espagnolette mechanisms, locking strips, handles, hinges and window alignment.

 

Do you repair multipoint locks and gearboxes?

Yes. We repair and replace many types of multipoint locks and gearboxes, including Yale, GU, Lockmaster, Fullex, Mila, Winkhaus and MACO systems.

 

Do you offer emergency uPVC door repairs in Oxford?

Yes. We provide 24/7 emergency uPVC door repair services in Oxford. Many faults can be dealt with straight away, although some repairs may depend on replacement-part availability.

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uPVC Door and Window Repairs in Oxford and Oxfordshire

If you need help with a faulty uPVC door or window in Oxford or Oxfordshire, contact B&B Locksmiths.

We can assist with uPVC door repairs, uPVC window repairs, multipoint lock faults, gearbox replacements, jammed doors and windows, dropped or misaligned doors and suitable security upgrades.

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Contact B&B Locksmiths for clear, practical advice, professional repairs and reliable local service.

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