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How to Measure the UPVC Door Lock

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

The most important thing when it comes to UPVC door security is the door lock . Here’s how you can measure the UPVC door lock to ensure it is the correct size.


Before you begin measuring your UPVC Door Lock, there are a few things you need to prepare for. First, you will need to have a tape measurer. Make sure the tape measurer is marked in millimetres. You will also need a pen and paper, or some other medium to keep track of your measurements. Before taking any measurements, make sure you double-check that the door and frame are clear of any obstructions. Once everything is ready, you can begin measuring your UPVC door lock.

Gather the necessary tools

Before you begin the project to measure an UPVC door lock, you will need to gather together all of the tools and supplies you’ll need for the job. It is important to have all of the tools close at hand so that you don’t have to search for them throughout your project.

Below is a list of items that should be available when taking measurements on an UPVC door lock:
– Tape Measure: For measuring in millimeters or centimeters.
– Pencil and paper: For taking notes and recording measurements taken.
– Protractor: Used to determine angles and alignment between holes in different parts of a door frame.
– Spirit Level: Used for ensuring a correct level or plumb line when measuring and marking out doors, frames etc.
– Flashlight/Torch (optional): To ensure accurate measurements, it is sometimes helpful to be able to see inside small holes that may not be easily visible due to their depth or darkness. A flashlight can be helpful in these cases.

Measure the door frame

To measure the door frame of UPVC door lock, it is important to make an accurate measurements before you buy a new door lock. Accurate measurements will ensure that you get the right size, product and fit for your particular opening. When measuring the door frame, make sure that you measure both the width and height of the doorway opening. When taking these measurements, be sure to measure from the outside face of one side of the frame to the opposite side. This will give you an overall size for your UPVC door lock. Additionally, make sure that when you take these measurements, there is enough allowance for any obstructions such as handles or decorative features on either side of the frame. Accurately measuring your doors will also allow for a smooth installation process as well as ensuring consistency when replacing locks in multiple apartments or units.

It is recommended that you use a metal ruler with millimetres marked along its length so that it’s easier to get more accurate readings than if using a wooden ruler or tape measure with ‘inch’ markings instead of ‘millimetres’. Additionally, use paper and pencil when taking notes at each step so it’s easier to remember all measurement steps later on during installation procedures.

Measure the UPVC Door Lock

Measuring the UPVC door lock is an important step when it comes to replacing and installing a new lock. It is important to measure up accurately so that the new lock will fit correctly, and will be secure and durable. This guide will give you step-by-step instructions on how to measure and install a UPVC door lock.

Measure the lock’s length

In order to accurately measure the length of the UPVC door lock, it is important to use the correct tools. You will need an accurate tape measure or ruler, and a flat surface such as a countertop or table.

Begin by measuring from the center of the handle’s spindle, then extending the ruler down to an imaginary point one-and-a-quarter inches below and parallel to the spindle (this is typically known as ‘the backset’). Take special care when measuring this distance to ensure accuracy, then record this measurement for reference.

Next, measure from the point where your ruler touched at one-and-a quarter inches below, then pass your ruler horizontal across and along with any existing keyhole until you reach either side of the casing. This measurement should be relatively easy to gauge with the help of a tape measure, although a short piece of string may also be used if necessary.

Finally, add these two measurements together (namely one-and-a quarter inches plus either side of casing). The figure you have should represent your UPVC door lock’s overall length. Record this number carefully and keep it as a reference when purchasing new locks – it will greatly affect compatibility with any new standardised designs available on today’s market.

Measure the lock’s width

Measuring the width of a UPVC door lock is an important step in ensuring that you purchase the correct replacement part. The measurement can be taken either internally or externally, depending upon your requirements.

For internal measurements, ensure that the door is closed, then measure the distance between the two visible face plates, in a straight line. This measurement should be taken from centre to centre, and you should use a ruler or tape measure to make sure your results are accurate.

For external measurements: again with the door closed and using a ruler or tape measure, simply measure the width between both face plates on either side of the door. This is known as ‘measuring across’; take into account any additional embellishments and butt hinges when taking this measurement for accuracy.

Remember to write down these measurements as reference for when you come to purchase new parts for your UPVC door lock system; remember that there are many varieties and sizes available so it’s important to have an exact measurement when ordering new parts online or from your local hardware store.

Measure the lock’s depth

Before you decide which type of new lock to buy, you will need to measure the existing UPVC door lock. Even if you have the same model of door, one could be slightly different from another because of the tolerances in their manufacture and fitting. To measure your UPVC door lock accurately you need to measure the depth of both it and its latch bolt where they meet on the frame side.

Measuring the depth is simple if your UPVC door is already installed, as all you will require is a tape measure or ruler. When measuring, start with 0 at the faceplate or exposed surface of the lock. Measure firstly along its faceplate for 10-15mm and then across until it reaches not just its latch bolt but most importantly its back edge – where both parts meet on the frame side – which should be around 35-40mm from your starting point depending on which UPVC door lock model it is. This dimension gives you an adequate measurement for purchasing a new replacement unit that should fit perfectly in place once installed and have no additional alterations necessary.

Install the UPVC Door Lock

Installing a UPVC door lock can be an easy and straightforward process, but it is important to ensure that the correct measurements are taken before the lock is fitted. Measuring the UPVC door lock correctly will ensure that the lock fits properly and that it works correctly. This article will provide a step-by-step guide on how to measure the UPVC door lock correctly.

Mark the door frame

To correctly measure the UPVC Door Lock, it is important that you correctly mark the door frame. This means taking off all accessories such as door stop and skirting, before measuring the length and width of the door frame’s cavities. All door frames should have four cavities; one where your UPVC Door Lock will fit, one for hinges, one for latch strike plate and one for deadbolt latch. It is also essential that you measure the door thickness as this should match with what type of lock you purchase.

Once all measurements are taken, mark out corresponding lines on both sides of the cavities on both sides on each end of the door frame to ensure that everything lines up once you install your UPVC Door Lock. This will help keep everything in alignment when you actually install the hardware later on. As a bonus, you can use these lines to implement a locking system so that everyone who has access to your home understands exactly how it works at a glance without having to look up complicated instructions or do trial and error attempts.

Drill the holes

Once you have identified the correct centre measurement to install your lock, it’s time to drill the holes.
UPVC locks usually require two holes be drilled into the UPVC door, one for the lock handle and one for deadbolt.
Carefully measure each hole and make sure that they are spaced accurately, then mark their centres with a pencil or felt-tip pen.
Using a drill bit appropriate for your UPVC door and a power drill, start with a smaller diameter bit and gradually increase size until you can fit your chosen lock. Make sure that all of your drill bits are specifically designed for UPVC doors and do not use conventional woodworking bits as they can cause damage to the plastic material.
Once you have created an appropriate sized hole in your UPVC door, double check to ensure that you have not caused any damage to it or any other components of the frame in which it lies.

Install the lock

Installing a UPVC door lock is relatively straightforward but it’s still important to measure correctly in order to make sure the lock is fitted correctly. Before buying a new lock, it’s important to measure the size and shape of the existing one. This will ensure you get the correct model for your door.

To measure for a new lock, use a tape measure or ruler to accurately determine the backset – this is the distance between the edge of the door and the centre point of where your current lock sits; this will usually range from 65mm up to 95mm, depending on your door. It’s also important to identify what type of latch you have – some are square edged and some are rounded. This information can be found on the faceplate of your current locking mechanism.

Once you have all these measurements, you can select an appropriate size and shape, as well as matching accessories that match all necessary specifications. Once selected, use a screwdriver to remove any screws that hold your old door lock in place and carefully unfasten it by slowly prying up from its connection points. Then clean out all dirt from handle side cavities before fixing new parts together and install new UPVC handle locks following instructions provided by manufacturer carefully. Finally, tighten screws properly for secure installation and test locking mechanism by opening & closing with keys after ensuring everything works adequately before operation of handle finally finishes successful installation process for your UPVC doors..

Test the UPVC Door Lock

Testing your UPVC door lock is an important step in making sure that your home or office is secure. It is also important to measure the door lock to make sure you get the correct size when replacing or installing a new one. In this article, we will discuss the steps you need to take to accurately measure your UPVC door lock and the difficulties you may encounter.

Check the latch operation

Before you start measuring the UPVC door lock, it is important to check the latch operation. Make sure that the latch shoots and stays back when the door handle is pushed down, and returns quickly when released. If it is not working correctly, you should contact a qualified locksmith to make necessary repairs before attempting any further measurements.

Then, locate the UPVC lock case. This will generally be mounted on the opposite side of the knob that you push down to open it. You should also be able to see a button or lever on one or both of the sides of this case which can serve as a keyhole for unlocking purposes if you have lost or misplaced your key.

Now, measure this locking mechanism using a chisel, ruler or other suitable metal-working instrument. Start by measuring from one end of the UPVC lock to another; this dimension should equal approximately 2-3/4 inches (7 cm). Record your results in centimeters and inches with each measurement and then re-measure until all results match up correctly. Additionally, you will need to measure all of the internal components such as pins within each cylinder cylinder as well as any external components attached directly onto this assembly. Once all measurements have been taken, your results give you an exact guide into what type of replacement part is necessary and provide instructions on how to install it correctly so that your UPVC door lock can offer maximum security in keeping with industry standards.

Check the handle operation

To properly test the operation of a UPVC door lock, there are two aspects to take into account – the physical handle operation and the lever movement.

Handle Operation: Begin by ensuring the handle operates correctly when moved from left to right and vice versa. If not, it may be due to misaligned locking points or something preventing the latch mechanism from engaging properly. Check for any inward pressure on the door frame that could be restricting its movement, such as a protruding piece of trim which is pushing against it.

Lever Movement: When attempting to measure if the UPVC door lock is operating correctly, you should use a lever tool as this will enable you to accurately test if it is opening and closing securely at both ends. Using a lever tool, try to raise and lower both sides of the latch mechanism. Look for any signs of binding or rough movement when doing so as this indicates that additional parts such as guard pins or locking mechanisms are not correctly set up or positioned within their housing.

Check the key operation

Checking the key operation of a UPVC door lock is an important measure for determining if the lock is working properly. To begin, check that the key works smoothly when it is inserted and removed from the lock, with minimal effort. Next, turn the key up to 90 degrees in both directions and listen for clicking sounds that signify resistance in the internal mechanism. The more clicks you hear, the better resistance you can expect from your lock. Finally, try pushing and pulling on the handle while keeping hold of one side of your key while turning it to ensure that it can only be turned when pressure has been applied to your handle. This should rule out any outside tampering with your locking mechanism. If at any stage during this process you feel resistance or hear strange noises, this may indicate damage to your door lock and should be further investigated by a professional before use.


Regular maintenance of your UPVC door lock is essential in order to ensure its proper functioning and longevity. It is important to check the condition of the lock periodically to ensure that it is in a working condition and free from any rust and dirt. In order to do this, it is necessary to measure the lock’s parts and determine if they are in working condition and if the components need to be replaced or repaired. In this article, we will discuss the steps for properly measuring the UPVC door lock.

Clean the lock regularly

Regular cleaning is an important part of maintaining your UPVC door lock. Cleaning the lock on a regular basis will stop dirt and grime from building up, which can interfere with its smooth operation. Follow these steps to keep your UPVC lock clean:

-Mix warm water with a mild detergent or soap, and use a soft cloth or brush to wipe the external surfaces of the lock.
-If necessary, use a toothbrush with bristles that are no longer than 0.5 millimeters (mm) to reach difficult areas.
-Be careful not to damage the surface when brushing against it as this could cause parts of the locking mechanism to seize up.
-Do not spray cleaning fluids directly onto the door lock as this could cause damage. Instead, dip a cloth in the cleaning mixture and apply it gently but firmly to any dirt or debris that has built up in or around the lock.
-Clean away any residues with warm water and then dry off any excess moisture with a clean lint free cloth.
-Check if there are any moving parts such as levers or hooks that could be causing resistance when you push them down or turn them in certain directions; if so, spray some lubricant oil on those areas to remove any friction.

Lubricate the lock regularly

In order to preserve the integrity of your UPVC door lock, it is important to lubricate it on a regular basis. This helps ensure that the parts move smoothly and prevents dirt buildup. To properly lubricate a UPVC door lock, you should use a quality silicone-based lubricant or graphite spray. If you opt to use graphite spray, make sure to spray the whole surface area of the cylinder and keyhole. Be careful not to get any of the liquid inside when spraying, as this can cause damage.

By regularly lubricating your lock, you can help prevent wear and tear and reduce any potential problems when trying to open or operate your UPVC door locks in different weather conditions. If you are unfamiliar with how to lubricate a UPVC door lock, consult with an experienced locksmith or hardware store attendant for proper guidance before attempting on your own.

Replace the lock if necessary

If your UPVC door lock is not working correctly, it may be necessary to replace the whole mechanism. Replacing a UPVC door lock requires some basic tools, along with a new lock. Before beginning to replace the lock, it is important to identify the correct measurements of the door so that you get the right parts for your specific application. You can take these measurements by measuring the two sides of the door and then calculating the centre measurement between them using a ruler or tape measure.

Once you have identified which parts are required for your specific application, you will need to unscrew and remove all necessary components from within the door frame in order to get access to the old UPVC door lock. The components within include: face plates, boxes, escutcheons and spindle rods. It is important not to apply too much force when removing these components in order to avoid damaging any of them or bending any springs inside them during removal.

Once all components are removed from within the frame, you can start replacing each individual component before finally installing a new UPVC door lock. Make sure that each component is securely fitted before screwing back into place and doing a test run of how well it operates before completing reinstallation of all other components into place as finally installing a new UPVC Door Lock – making sure with every step taken that no unnecessary pressure has been applied when fitting/removing any part or component as this can cause damage if too much force has been applied at any stage during this simple maintenance procedure.

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