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How to replace the lock barrel on a door

How to Change a Barrel Lock on a uPVC Door

Read our guide to changing the lock barrel on a uPVC door in only 5 minutes.

Changing a barrel lock

If you need to change the lock on a uPVC door, you can change just the lock barrel which is an easy job and only takes five minutes.


There are a few reasons for changing the lock, you might have just moved into a property, a tenant has moved out and not returned a key, you have misplaced a spare key or the barrel may have become damaged and is no longer working as it should.


All of these door lock problems can be solved easily.


If you have lost your keys and want to change a barrel lock on a uPVC door without a key – you need to call a locksmith. You do need the key to change the barrel yourself, otherwise only a locksmith or specialist can change it for you.


Once you have your new uPVC lock barrel replacement, you will just need a screwdriver.


Watch our Everest expert video to walk you through the process of changing the lock in your uPVC door and you can also read the step-by-step instructions to guide you.


Tools you will needDuration
Screwdriver, lock barrel and new door keys5 minutes

How to remove the lock from a uPVC door

First, follow the steps below to remove the door handle so you can access the lock barrel.

Step 1

Step 1

First, make sure the door you are working on is propped open or secured safely, so this procedure is easier to complete without the worry of the door closing mid-operation.

Step 2

Begin by loosening the screws that are holding the handle in place. Composite door handles typically have two screws holding them in place, and they will be on the inside of the door for security. If you’re struggling to locate the screws, they will most likely be covered by caps for aesthetic purposes. Using your Phillips-head screwdriver remove both the top and bottom screws that are holding your handle securely to the door.

Step 2
Step 3

Step 3

Once you have removed the screws, both the outer handle and the interior handle will slide out together. Make sure you do this slowly and keep hold of both outer and interior handles as you remove them. You don’t want to lose or damage any pieces in case they are needed again in the future.

How to replace the lock barrel

Now, follow the steps below to remove and replace your lock barrel.

Step 1

Step 1

First, you need to locate the lock barrels screw which is underneath your door lock and usually stands out from the locking mechanism of the screws of the door as it’s a different colour. An example is shown here.

Step 2

Once you’ve located the screw you need to remove it.

Step 2
Step 3

Step 3

Once removed you will need your current key, insert the key into the barrel and twist to the right, shown here.

Step 4

After it’s been twisted you should be able to pull the barrel out with ease.

Step 4
Step 5

Step 5

Take your new barrel and keys.

Step 6

Insert the new keys into the new barrel as you did with the previous one and slot it back into its place.

Step 6
Step 7

Step 7

Keep twisting the key until the barrel slots in nicely and you can twist the key normally with no issue.

Step 8

Once aligned find your lock barrel screw and proceed by screwing it back into place. It might take some trial and error to get it slotted in.

Step 8

Now to put your handle back on

Follow the steps below to put your handle back in place.

Step 1

Step 1

Grab either side of your door handles with the spindle. Place the spindle inside the handles socket then place it in through the hole of the door.

Step 2

Grab the opposite side of the handle and fit it on the other side of the door secured in the spindle hole.

Step 2
Step 3

Step 3

Once the door handle is on both sides simply insert both screws into the two screw holes and tighten them to secure the handle in place.


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