How Do uPVC Door Locks Work? Explained for Beginners | Locks Buddy (2023)

Before you purchase a uPVC door locks you probably wondering about how do uPVC door locks work? There are different types of uPCV door locks, but in general most of the uPVC locks have similar working mechanism. Understanding its mechanism, will help you to understand the security and strength of the uPVC locks.

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how do uPVC door locks work? The uPVC door locks work simply by functioning inside the gearbox. Inside the box, many rollers, hooks, and bolts were set by the producer to provide you the finest security. It gives a noise-free door locking system as it was made with good-quality metal parts. These uPVC door locks also contain a multi-locking system that works just like professional locks.

The process of repairing a uPVC door lock might seem like a hassle. But using the right tools and the right instruction, you may also be able to set a uPVC door lock.

With that being said, we can now move on to more information on uPVC door locks. Stay with us on the upcoming informative Paras about uPVC door locks!

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Things To Do: Before Purchasing a uPVC Door Locks

As there are different types of uPVC locks, so take recommendation from a experience locksmith on what type of uPVC lock you should buy.

Not all uPVC locks comes with multi-point locking mechanism, so before you buy the locks make sure it comes with this features. Multi-point locking mechanisms are far superior because of its ability to provide an additional degree of security.

Buy the locks of popular recognized brand (they produce the best quality locks). Here are few recommended locks brand : Mila, Avocet, Fuhr, GU, Yale, Winkhaus, and Fullex.

How To Replace uPVC Door Locking Mechanism?

Replacing the old lock with new locking mechanisms (uPVC Door Locking Mechanism) may seem a difficult job for beginner, but we are here to help you. Follow the steps below to replace uPVC door locking mechanism:

Required Tools to Change UPVC Door Locks

To replace the locks, you will require few necessary tools such as Phillips screwdriver and tape measure. Screwdriver are required to undo the screws of the lock and tape measure are required to measure the lock cylinder.

Getting the Right Size of the Locks

In this section, you must pay close attention to the gearbox sizes of a backseat. This is important because the backseat is one of the important components that must be fixed well on your door to function properly, so its necessary to take correct measurement of this component.

Now, carefully measure the backset from the edge of the gearbox case to the middle of the euro profile. You must measure from the center euro profile to the top of the spindle to achieve the correct PZ measurement.

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Once you have the correct measurement, now you can install the locks on the door. Watch the video below to install the lock:

How To Fix a uPVC Door Lock Mechanism? (Common Problems)

How Do uPVC Door Locks Work? Explained for Beginners | Locks Buddy (3)

A high-quality uPVC Multipoint door lock is expected to last five to ten years. But if you notice that it is not working properly at any point, you must understand what part of the locks is causing this problems. As a uPVC door has numerous moving components, you must account for every part of it.

Problem with Lock Cylinder

If your key is difficult to turn or if you have difficulty unlocking the door, most probably the lock cylinder portion is likely to be damaged. Commonly, the lock cylinder problem cannot be fixed, therefore you need to replace it with a new one.

Buying another new lock would sometimes cost a lot more than replacing a specific part. Many people choose to buy uPVC locks mainly for this reason. Suppose your gearbox has the most common source of issues; therefore, you’ll just need to repair the gearbox somewhat instead of the entire lock.

Misaligning Locks (Most Common Problem of uPVC Door Locks)

Most customers had a complaint about a common problem i.e. misaligning locks. These types of door locks have a more difficult alignment system than any other lock. Thus, locking or unlocking a door may not be as secure as other perfectly fit locks.

A common situation could be a door going out of alignment. This sometimes occurs also when weather conditions worsen a door’s borehole. To check if your uPVC door lock has the same problem or not, you can open and lock it several times until any issue shows up.

Keep in mind that if the door locks and unlocks easily while not in contact with the doorframe, your locks are most likely to be out of alignment. To better understand the door lock’s situation, you may call a locksmith to inspect the inside details of the lock.

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Solutions: An Allen key or screwdriver is required firstly to solve this common problem. Next, loosen the fixings with these tools on the inside of the doorframe so that it can meet the lock. Don’t worry if it doesn’t work on the first attempt. You can repeat this a few times before you find the ideal fit. Once you have fixed the door problem, tighten the bolts up.

Locks That Break From Putting a Heavy Amount of Pressure

Believe it or not, we have seen many of you implying anger on your door lock for not opening! Every lock tends to become weaker over time, and they break once you put heavy pressure.

Keeping it greased with a WD40 or any similar lubrication will make your door locks last longer. Since lubricating, you must avoid putting excessive force on the door handle. Otherwise, your door lock may start breaking bit by bit. No matter what, you shouldn’t put heavy pressure while turning the handle.

Easily break free locks Some inexpensive typical uPVC door locks can give easy access to an intruder. These are made with temporary materials, which offer short time security. When a break-in occurs, they are utilized to keep the cost of the door low. Yet, it may necessitate the replacement of important household objects by someone once these locks are damaged.

How To Lock A uPVC Door Without A Key?

A uPVC door may be unlocked without a key by drilling off the lock barrel first. Using HSS bits, a pilot hole may be drilled, followed by a 10 to 12mm hole. Because the bigger bit is so little, it won’t even make a dent if you accidentally slam the drill bit shut.

On a Euro-style barrel, a screwdriver is enough to turn the cam. This tool can be used so that no one else can access it through the door except the person who snapped it. To fit perfectly, snapping barrels from the outside with the handle is difficult, but from the inside, with the handle is easy. Once removed, it gives you enough information about the barrel to strike it from the top, snapping it in half. This allows you to access the locking mechanism.

Since anti snapping barrels still snap, keep the cam in place so that no one can access it. You can change the plates and barrel screw with a new barrel. Also, you must replace the handle. Most uPVC users tend to apply the same procedure. They find it difficult to do from the exterior if there are no keys for the door. This is why the entire thing must be dismantled to continue locking a uPVC door without a key.

Sometimes, this process might not work with all doors. Removing the hinges and pulling the door back will not always favor you. You could have better access to the lock with a key, and making it keyless may weaken the lock. A likable situation may include slightly undone screws that can be broken with a hammer.

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Did I Answer Everything You Wants To Know About How Do uPVC Door Locks Work?

We hope we’ve provided you with the finest information about uPVC door locks. We believe everyone understood exactly what you needed to know and how to do it. Spending a little extra money on a higher-quality uPVC locks is ultimately what I recommend. Also, before you buy the locks make sure it has positive customer review.


How does a uPVC door lock mechanism work? ›

The gearbox found in all uPVC doors is a smaller part of the multipoint mechanism. When you lift the door's handle, the gearbox, located inside the door, turns a number of rollers, hooks and bolts. This ensures the door is securely locked.

What is the locking mechanism on a uPVC door called? ›

uPVC door locks are often described as multi point locks, this is because they usually have multiple locking points along the door.

Why won't my uPVC door lock when open or closed? ›

Check for any blockages on the outside of the door, as well as the frame of the doorway. The door may engage a lock at multiple points, so be sure to check all locking points are clear. Also, make sure that nothing is caught on the bottom edge of the door.

Why is my uPVC door difficult to lock or open? ›

Check if the door is too hot or cold - In extreme temperatures, a uPVC door will expand and contract which can cause problems locking the door and with the lock mechanism. Parts inside the lock mechanism and the lock gearbox can contract/expand making the lock feel stiffer than usual.

Why wont my key turn in my uPVC door lock? ›

If you have a uPVC or Composite Door and the key won't turn in the lock, the main reason this happens is when the locking mechanism is broken. When the uPVC locking mechanism breaks, the key will usually not turn and the handle will not pull down.

What are the different types of door mechanisms in uPVC? ›

There are 3 main types of locking operation: Lever lever, Lever Pad and Key operated (wind up): Lever lever is when the door handle has to be lifted to engage the locks then turn the key once to lock. The door can be opened by pushing down the handle set from either side when unlocked.

What is the mechanism that keeps a door closed? ›

The spring-loaded metal part of the mechanism that protrudes out of the door is called the latch. This ensures the door is latched, i.e., keeps the door closed. When the lever is turned down, the spring-loaded latch retracts from its rest position and goes inside the door. This allows the door to open.

Why is my uPVC door not closing easily? ›

If you notice that it is getting harder to open and close, it could be for a few reasons. Firstly, and perhaps most commonly, your door could have dropped. Doors can drop if the hinges become loose. Secondly, damp, or humid conditions can also affect your door's ability to close properly.

Why is my uPVC door sticking when I close it? ›

How to Stop Them Sticking. An instant fix for swelled uPVC is a quick wipe/wash with cool water. Just as this cools you down, it'll cool the door down and reduce the swelling! Longer term, whatever door you have, you'll want to check your hinges and make sure they're fitted clearly.

Why is my uPVC door handle not lifting fully to lock? ›

The first step in fixing a UPVC door handle that won't lift to lock is to determine the cause of the issue. Some of the most common causes include a broken or worn-out mechanism, an incorrect adjustment of the mechanism, a misaligned door frame, and a broken or damaged lock.

Can you change the mechanism on a uPVC door? ›

All you need to replace your old uPVC mechanism with a new central gearbox is a screw driver or drill and a spare 5 minutes! As long as you have selected the correct size central gearbox you will have no difficulty in changing it over.

Is there any adjustment on uPVC doors? ›

The screw at the top of the hinge is usually to adjust the height of the door with a tolerance of 4.5mm. The screw at the side is to adjust the door laterally with a tolerance of 5mm. The screw at the bottom of the hinge is usually to adjust the compression with a tolerance of 2mm.

Why is my front door not locking properly? ›

Factors like the weather, damage to the key, and even a buildup of dirt and grime inside the locking mechanism can all stop a door from locking. If you're having trouble locking your front door on a regular basis, you should consult a locksmith as soon as possible.

How does a door latch mechanism work? ›

The latch assembly is the heart of the doorknob and is basically a spring-loaded bolt. This spring bolt—or latch bolt—utilizes a "spring clip" to force the bolt outward and into a hole in the doorframe. This holds the door closed.


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