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How do you replace or repair lock of a uPVC door?

Changing the lock on an uPVC door is a valuable ability that could make your home safer and provide peace of mind. This guide will provide you with the necessary steps and information to carry out uPVC door lock repair or replacement effectively.

Understanding uPVC Door Locks

Before starting your uPVC door lock repair or replacement, familiarize yourself with the different types of locks. This expertise will assist you in choosing the quality lock you desire and ensure a smooth set-up.

Types of uPVC Door Locks

  • Cylinder Locks: These are commonplace in uPVC doorways and comprise a keyhole and a barrel.
  • Multipoint Locking Systems: These offer multiple locking factors along the door and are operated by lifting the handle and turning the key.

Tools and Materials Needed for uPVC Door Lock Repair

  • New lock (cylinder or multipoint, depending on your door)
  • Screwdrivers (Phillips and flat-head)
  • Tape measure
  • Pencil or marker
  • Digital caliper (optional, for precise measurements)

Step 1: Measure the Existing Lock

Measuring the existing lock accurately is crucial for uPVC door lock repair or replacement:
Open the Door: Fully open the uPVC door to gain access to the lock mechanism.

  1. Locate the Fixing Screw: Find the screw on the threshold of the door that holds the cylinder in location.
  2. Remove the Screw: Use a screwdriver to cast off the solving screw.
  3. Measure the Lock: Measure the lock from each stop to the solving hole’s centre. Record these measurements.

Choosing the Right Replacement Lock

When selecting a new lock, ensure that the measurements match your current lock. Additionally, consider the lock’s protection capabilities, which incorporate anti-snap cylinders, which provide extra safety in opposition to forced access.

Step 2: Purchase the Correct Lock

With your measurements in hand, purchase a lock that matches the size and security requirements. Hardware stores or specialised locksmith shops will have a range of options available.

Step 3: Remove the Old Lock

Removing the old lock is straightforward but must be done carefully to avoid damage to the door.

  1. Insert the Key: Insert the key into the old lock and turn slightly to align the cam with the lock body.
  2. Withdraw the Cylinder: While keeping the key turned, gently pull out the cylinder from the door.

Step 4: Install the New Lock

Installing your new lock is essentially the reverse process of removal.

  1. Insert the New Cylinder: Slide the new cylinder into the door, ensuring it’s miles flawlessly aligned with the locking mechanism.
  2. Secure the Cylinder: Once in the vicinity, use the previously removed screw to steady the cylinder within the door.
  3. Test the Lock: Before leaving the door, look at the new lock with the door open to ensure it operates efficiently. Make adjustments if necessary.

Common uPVC Door Lock Repair and Replacement Issues

  • Misalignment: Verify that the cam is properly positioned and examine the alignment if the lock fails to rotate effortlessly.
  • Stiff Operation: Lubricate the lock mechanism if operation is not smooth after installation.

Maintaining Your uPVC Door Lock

Regular preservation is crucial to increase the life of your new lock and ensure it stays effective.

Regular Maintenance Tips

  • Lubricate the Lock: Use a silicone-based lubricant to transfer the elements of the lock every six months.
  • Check for Wear and Tear: Inspect the lock periodically for signs and symptoms of wear or harm and address these issues promptly.


UPVC door lock repair and lock replacement is a straightforward process that enhances your home’s security. Following those steps, you can ensure a successful installation and experience the blessings of a stable, well-functioning lock. Remember, taking the time to choose the right lock and deploy it efficaciously will offer you protection and peace of mind for future years.

If you are in search of professional assistance or want to select a professional set-up for your new uPVC door lock, consider Towergate Locksmiths. Our experienced technicians provide reliable, efficient service tailored to your security needs. Trust Towergate Locksmiths to enhance your home’s safety with precision and care. Contact us today to secure your peace of mind. See what our customers are saying on Google Reviews.

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