How To Change A UPVC Door Lock?

  • Author: Fazal Umer
  • Posted On: November 1, 2023
  • Updated On: November 1, 2023

Changing a UPVC door lock may seem like a daunting task, but with the right tools and knowledge, it can be a relatively simple process. In this article, SJ Locksmiths Bromley guide you through the steps to safely change your UPVC door lock and provide some tips for maintaining it in the long run.

Understanding the Basics of a UPVC Door Lock

A UPVC door lock is an essential component of any UPVC door, ensuring the security and safety of your property. It is designed to prevent unauthorised access and protect your belongings. Understanding the basics of a UPVC door lock will help you during the replacement process.

When it comes to the security of your home or business, a UPVC door lock plays a vital role. It not only keeps intruders out but also provides peace of mind knowing that your property is well-protected. But what exactly is a UPVC door lock and how does it work?

What is a UPVC Door Lock?

A UPVC door lock is a mechanism installed on UPVC doors to secure them. It consists of a cylinder lock, latch, and a multipoint locking system. The cylinder lock is the most critical part as it is inserted into the door and has a keyway to be unlocked with a compatible key.

The cylinder lock is the heart of the UPVC door lock. It is made up of several pins that align when the correct key is inserted, allowing the lock to turn and open the door. The latch, on the other hand, keeps the door closed when it is not locked. It is a spring-loaded mechanism that extends into the door frame, preventing the door from being easily pushed open.

In addition to the cylinder lock and latch, UPVC door locks often feature a multipoint locking system. This system consists of multiple locking points along the length of the door, providing added security and preventing the door from being forced open. These locking points typically engage with the door frame when the key is turned, making it extremely difficult for intruders to gain entry.

Importance of Regular Maintenance

Maintaining your UPVC door lock is crucial to ensure its proper functioning and prolong its lifespan. Regular maintenance prevents common lock problems such as stiffness or jamming and minimises the need for immediate replacement.

One of the easiest ways to maintain your UPVC door lock is by regularly lubricating it. Applying a small amount of graphite or silicone-based lubricant to the keyway and moving parts of the lock can help keep it operating smoothly. It is important to avoid using oil-based lubricants as they can attract dirt and debris, causing the lock to become clogged and less effective.

In addition to lubrication, it is also important to regularly clean the lock and its surrounding area. Dust, dirt, and debris can accumulate over time, affecting the lock’s performance. Using a soft cloth or brush, gently remove any dirt or debris from the lock and its components. Be sure to pay attention to the keyway, as any obstructions can prevent the key from turning smoothly.

Furthermore, periodically check the alignment of the lock and latch. Over time, the door and frame may shift, causing misalignment. If you notice that the lock is not engaging properly or the door is difficult to close, it may be necessary to adjust the strike plate or realign the lock mechanism.

By taking the time to properly maintain your UPVC door lock, you can ensure its reliability and longevity. Regular maintenance not only keeps your property secure but also saves you from the inconvenience and expense of a lock replacement.

Tools Needed for Changing a UPVC Door Lock

Changing a UPVC door lock may seem like a daunting task, but with the right tools and a little know-how, it can be a straightforward process. Before you begin, it’s important to gather all the necessary tools to ensure a successful lock replacement.

Basic Household Tools

First and foremost, you’ll need a few basic household tools that you probably already have lying around. These tools include:

  • A screwdriver: This versatile tool will come in handy for removing screws and disassembling the lock mechanism.
  • A tape measure: Accurate measurements are crucial when it comes to installing a new lock. A tape measure will help you determine the correct dimensions for your replacement lock.
  • Pliers: Pliers are useful for gripping and manipulating small components during the lock replacement process. They can help you remove stubborn screws or align parts properly.

Having these common tools within reach will save you time and effort as you work on changing your UPVC door lock.

Specialised Locksmith Tools

In addition to the basic household tools, there are a few specialised locksmith tools that will make the lock replacement process even smoother. These tools are designed specifically for working with locks and can greatly simplify the task at hand. Consider investing in the following locksmith tools:

  • A lock pick set: This set of tools allows you to manipulate the lock’s pins and tumblers, making it easier to disassemble and remove the old lock.
  • A cylinder removal tool: This tool is specifically designed to safely remove the cylinder from the door. It ensures that you can extract the old lock without causing any damage to the door or surrounding components.
  • A UPVC door lock jig: This specialised jig is used to align the new lock precisely. It ensures that the lock is positioned correctly, allowing for smooth operation and enhanced security.

Investing in these specialised locksmith tools will not only make the process of changing your UPVC door lock easier but also increase your confidence in completing the task successfully.

Remember, when it comes to changing a UPVC door lock, having the right tools is just as important as having the right knowledge. By gathering the necessary tools, both basic household and specialised locksmith tools, you’ll be well-equipped to tackle the lock replacement process with ease.

Steps to Safely Remove the Old UPVC Door Lock

Preparing the Door

Before removing the old UPVC door lock, ensure that the door is in a fully closed and locked position. This will prevent any accidental damage and provide stability during the removal process.

It is important to take the time to prepare the door properly before attempting to remove the old UPVC door lock. Inspect the door for any signs of damage or wear that may affect the removal process. Check for any loose screws or hinges that may need to be tightened or replaced before proceeding.

Additionally, make sure that the area around the door is clear of any obstacles or clutter. This will allow for easy access to the lock and prevent any accidental tripping or injury during the removal process.

Removing the Lock

To remove the old UPVC door lock, start by unscrewing any visible screws holding the lock in place. Use a screwdriver that fits securely into the screw heads to avoid stripping or damaging them.

Once the screws are removed, carefully examine the lock mechanism to identify any additional components that need to be detached. Some locks may have additional screws or clips that need to be loosened or removed before the lock can be fully taken out.

After ensuring that all necessary components are detached, it is time to use the cylinder removal tool to push out the cylinder lock gently. This tool is specifically designed to safely remove the lock without causing any damage to the door or frame.

When using the cylinder removal tool, it is important to apply even pressure and avoid forcing the lock out. If you encounter any resistance, stop and reassess the situation. Forcing the lock can lead to damage to the door or frame, making the removal process more challenging and costly.

Once the cylinder lock is successfully removed, carefully inspect the area to ensure that no damage has occurred during the removal process. If any damage is detected, it is recommended to consult a professional locksmith or door repair specialist to assess and repair the issue.

Remember to keep all the removed components in a safe place, as they may be needed for reference or replacement when installing a new UPVC door lock.

Installing the New UPVC Door Lock

Installing a new UPVC door lock is an essential step in ensuring the security and functionality of your door. Whether you are replacing an old lock or upgrading to a more advanced one, it is crucial to choose the right lock and follow the correct installation process.

Choosing the Right Lock

Before installing the new UPVC door lock, it is important to choose a lock that is compatible with your door. Take precise measurements of the old lock and compare them with the specifications of the new one. This step is crucial to ensure a secure fit and prevent any issues during installation.

Consider the type of lock you need based on your security requirements. There are various options available, including cylinder locks, multipoint locking systems, and electronic locks. Each type offers different levels of security and convenience, so choose the one that best suits your needs.

Additionally, consider the brand and quality of the lock. Opt for reputable manufacturers that offer reliable and durable products. Reading customer reviews and seeking recommendations can help you make an informed decision.

Installation Process

Once you have chosen the right lock, you can proceed with the installation process. Follow these steps to ensure a successful installation:

  1. Step 1: Remove the old lock. Before installing the new lock, you need to remove the old one. Use a screwdriver to unscrew any screws holding the lock in place. Carefully detach the lock from the door, making sure not to damage any surrounding components.
  2. Step 2: Prepare the door. Inspect the door and ensure that it is clean and free from any debris. If necessary, use a mild detergent and water to clean the surface. Allow the door to dry completely before proceeding.
  3. Step 3: Insert the new cylinder lock. Take the new cylinder lock and insert it into the appropriate hole in the door. Ensure that it fits snugly and aligns correctly with the keyhole on the exterior side of the door.
  4. Step 4: Secure the lock. Once the cylinder lock is in place, use the provided screws to secure it to the door. Make sure to tighten the screws adequately, but be careful not to overtighten and damage the lock or the door.
  5. Step 5: Attach the multipoint locking system. If your new lock includes a multipoint locking system, carefully attach it to the door. Ensure that all the components align correctly and that the system operates smoothly.
  6. Step 6: Test the lock’s functionality. After installing the new UPVC door lock, it is crucial to test its functionality. Insert the key and turn it to lock and unlock the door. Check if the lock operates smoothly and without any resistance. If you encounter any issues, double-check the installation and make any necessary adjustments.

By following these steps, you can successfully install a new UPVC door lock and enhance the security of your home. Remember to prioritise safety and take your time during the installation process to ensure a proper fit and functionality.

Tips for Maintaining Your New UPVC Door Lock

Regular Cleaning and Lubrication

To maintain your new UPVC door lock, it is essential to clean it regularly and apply lubrication to ensure smooth operation. Use a non-abrasive cleaner to clean the lock and remove any dirt or debris. After cleaning, apply a small amount of graphite lubricant to the lock mechanism to prevent stiffness and ensure optimal performance.

Avoiding Common Lock Problems

To avoid common lock problems, be mindful of how you handle the UPVC door lock. Do not force the key or apply excessive pressure, as this can cause damage. Additionally, avoid using harsh chemicals or excessive moisture near the lock, as they can cause corrosion and affect its functionality.


By following the steps provided by SJ Locksmiths Bromley and practising regular maintenance, you can successfully change your UPVC door lock and ensure the security of your property. Remember to always prioritise safety and consult a professional if you encounter any challenges during the process.

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Author: Fazal Umer

Fazal is a dedicated industry expert in the field of civil engineering. As an Editor at ConstructionHow, he leverages his experience as a civil engineer to enrich the readers looking to learn a thing or two in detail in the respective field. Over the years he has provided written verdicts to publications and exhibited a deep-seated value in providing informative pieces on infrastructure, construction, and design.