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Replace uPVC Door Locks & Barrels

door lock mechanism with handle
Inspecting mortice door locking barrel
uPVC patio door locking mechanism

uPVC Window and Door Lock Repairs

Expert locksmiths to repair uPVC door locks, keeps & window locking mechanisms.

Today, double glazing windows and doors are quite advanced and have joints on the uPVC frame for standard or bespoke jobs. Throughout their lives, uPVC frames have to move frequently and over time can become out of alignment to prevent multi locks from working and the opening to close properly. Adjustments are required by a professional fitter to keep your windows and doors functional.

Where a locking mechanism has been neglected due to lack of adjusting, it can cause the single or a multi lock to become defective or wear out sooner. The cost of fixing it is much higher than paying for a simple adjustment and will require replacement parts, such as barrels, door cylinder, lock keeps or the whole unit. A locksmith sent out for an inspection will check the damage and provide a quote for the replacement uPVC locking part you require. See lock types below:

  • Multipoint locks
  • Thumbturn locks
  • Key operated security bolts
  • Euro Cylinder locks
  • Mortice lever locks
  • Hookbolt locks

Multipoint Lock Experts

Installing multipoint locking mechanisms are more common in uPVC double glazing door applications and are secured with split or solid spindles. As well as these versions of security features, we also stock upgraded multipoint locks with centrally located deadbolts for added safety at home or in your business premises. If you have an issue with your device, then our locksmith expert can replace Euro cylinders or the modern cylinder free locking mechanisms if needed. Ask for an inspection or a free quote if you know what you want.
We deal in many locking points & operations:
  • Latch Bolt
  • Lift Lever
  • Security Pins
  • Lightlatch Locking
  • Wedge Bolts
  • Key Wind Type
  • Hooks and Pins
  • Automatic Locking

Locking Problems

  • 1
    Jammed Lock Mechanism

    Do you have a jammed lock? If your key no longer fits in or goes in but does not turn, it usually means that a there is a problem with the barrel, often the Euro cylinder. A new replacement Euro cylinder will need to be installed to sort out the problem.

    A blocked or faulty mechanism can happen due to several reasons including poor quality lock or mechanical synchronisation failure. Preston Glass Fix will replace your uPVC profile lock with a high quality British Standard approved type in the first instance to protect your property when you call us out. .

  • 2
    Door Or Window Not Locking

    Does your window or door not lock? There may be a problem with the strikes being misaligned to allow working order of the appliances installed to uPVC frames. Our specialist locksmith will check the hinges and the seals as well, and carry out the necessary changes. At this stage, if no issues are found the expert will further inspect the hardware and discover the defective part that is hindering the function of the bolt or latch.

  • 3
    Unable To Shut Door

    Adjustment may need to be carried out where the door or window locking mechanism is misaligned with the latch. What you may find is that the rubber window or door seals and spacers are positioned incorrectly which obstructs the moving path of the frame. Our Preston Glass Fix fitters use professional tools to make the crucial alterations for the uPVC door or window to shut properly.

  • 4
    Broken Lock And Handle

    Having a broken handle and lock can stop the door or window from locking. Upon close inspection, if you see any physical damage to the handle or lock, it is more than likely a new replacement part will be required. Do check the opening lever to see if it is not quite right or feels loose which suggest that there is an internal worn or faulty hardware that needs replacing.

    Having to rattle the key up and down to turn the lock or you find that the multipoint hooks are not latching to the frame could mean that the locking mechanism is damaged. Our professional expert can inspect your double glazing setup and offer recommendations to what requires replacing or removing.

To Replace Your Window Locks Contact Us

Specialist experts in window locking handle repairs or replacements
Call Preston

Frequently Asked Questions


  • Can I measure my own uPVC multipoint door lock?

    It can be measured, but with so many different versions of multipoint door locks, it can be difficult to provide a generic guide in measuring your lock. Each type will have the backset, centres and the locking point distances in different places and can be tough to get it right. We like to come out to check and measure to ensure that the correct lock is selected. For a rough estimate of a lock replacement, you can send us a picture of your hardware with a ruler next to it so that we can offer an approximate quotation.

  • Are you able to supply just the locking hardware that I require?

    Of course we can if we have it in stock. Do check that the measurements supplied are correct and you indicate the specification you need as items that do not fit cannot be returned if the packaging is not unopened. Your right to return for a manufacturing fault is not affected.

  • Can you install digital or smart locks?

    At the moment Preston Glass Fix do not replace smart locks. We understand that is a new emerging smart technology trend and are currently taking steps to include smart installations to our services.