There’s nothing quite as annoying as a window that just won’t close properly no matter how you try to get the damn thing locked. Maybe the breeze filtering through the gap is cooling down the room or a wobbly handle is getting on your nerves. Whatever the case, a faulty lock on a uPVC window is not to be overlooked; after all, the utility and security of your home is often contingent on the smallest bits of hardware. Which is exactly why today we’ll be providing some advice on how to fix a uPVC window locking mechanism.
From spotting common issues and sharing their fixes to understanding when it’s a good idea to seek professional assistance, we’re spelling out everything you need to know when your windows go wrong, and we’re keeping it as simple as possible so anyone can follow.
NB: If say, you’ve moved into a new home and want to replace the locks, but you or the previous owner has misplaced the keys, it’s time to do some searching. You will need them to achieve many of the fixes we’re going to share later. This means that if they’re completely lost in the ether, you should get ready to reach out to a local locksmith who can identify the lock type and sort things for you quickly.
First, Though, Why Are Properly Functioning Window Locks Important?
Besides the obvious (it’s a pain in the backside), there are countless reasons why you shouldn’t put off getting your uPVC window locks repaired.
- Noise – Although harder to pick up on in the summer, when your windows might be wide open, a lack of noise insulation might become a problem.
- Air pollution – If you live in a built-up area with poor air quality, you might want to keep those windows sealed up while an air purifier does its work; this is made significantly harder when there’s a tiny gap allowing the outdoor air in.
- Thermal efficiency – This is a big one. Did you know that 18% of heat loss occurs through windows? This means that you’ve got to be extra careful to ensure that your windows close and seal correctly when they’re locked.
- Security – A compromised window locking mechanism could leave you vulnerable to break-ins. To avoid joining the following statistic, it’s a good idea to stay on top of your window security: 30% of burglaries are achieved through window entry.
- Insurance – Relating to the previous point, if your window locks aren’t up to scratch, you may find that they’re uninsurable. For this reason, it’s a lot more economical in the long run to make sure they’re up to standard.
- Legal responsibility – As a landlord, you may be subject to certain responsibilities when it comes to property upkeep and safety. This way, it’s advised you change the locks on your rental property every so often.
Signs Your Window Locks Are in Need of Repair
With the preliminaries out of the way, we come to our first big question: how do you know when you need to fix your window’s locking mechanism? Well, we’ve got that covered. Here are some signs to look out for that indicate the mechanism is the source of your problems.
- Trouble moving the handle.
- If the lock is jammed and won’t turn.
- The latches look misaligned.
- You’re seeing visible damage or corrosion – here, pieces might even fall out.
How a Working Lock Mechanism Should Operate on a UPVC Window
We’ve covered what to look out for when your window needs repairing, but how should it function on a good day? Understanding this will help you when it comes to learning how to fix the uPVC window locking mechanism.
It’s pretty simple, and goes like this:
When you close the window and turn the handle, the window locks. This is thanks to a few components: the aforementioned handle, gearbox, shootbolts and the shootbolt roller cams.
In essence, the turning of the handle moves the gearbox, which then shifts the shootbolts and roller cams into their outward position, in the furthest corners of your window where it stays secured. You’ll start to experience window-locking problems when either the gearbox fails or the shootbolts aren’t able to move where they’re supposed to.
Common uPVC Locking Mechanism Problems & Their Fixes
If your window isn’t operating as it should and it’s exhibiting some of the signs we just detailed, then Houston, we’ve got a problem. Not to worry though, many of these are straightforward fixes and crop up often enough that it’s simple to identify them. Check out the problems below to see which is plaguing your uPVC windows.
- Problem – Damage to the lock or its constituent parts through corrosion or snapping.
- Solution – Cleaning and lubricating the lock, removing any broken bits or replacing the gearbox if all else fails.
- Problem – Loose parts.
- Solution – Tightening them with an appropriate tool such as a wrench or screwdriver.
- Problem – A misaligned lock.
- Solution – Loosening the screws, gently readjusting so it’s aligned properly and then tightening the screws to keep everything in place.
- Problem – The key has broken in the lock.
- Solution – Using a small flathead screwdriver or needle-nose pliers, carefully pry the broken piece of key out of the lock. You might need professional help if it won’t budge.
- Problem – A jammed lock (potentially caused by misalignment or dirt build-up).
- Solution – Follow the steps for misalignment above, clean and lubricate the lock. If none of these work, there may be a problem with the gearbox of the locking mechanism.
- Problem – A subpar or old locking mechanism.
- Solution – Replace the old lock with a more up-to-date and secure window lock such as a keyed cylinder lock or a pin lock.
How to Fix a Lock on uPVC Windows in 5 Steps
The step-by-step instructions for repairing window locks on uPVC windows aren’t too tricky. In a nutshell, it involves opening the window, cleaning/ lubricating the lock, replacing any broken parts if necessary and then reassembling everything and checking it works okay once you’re done.
Tools & Materials You’ll Need
- Safety equipment (gloves and goggles)
- Cleaning stuff (a soft cloth, mild detergent and tea towel)
- Screwdriver (flathead + Philips)
- Replacement parts and pliers (if necessary)
- Lubricant (WD-40 or a graphite-based lubricant)
Without further ado, here’s how to fix a window locking mechanism on a uPVC window:
1) Diagnose Your Problem
Remember what we said about common issues before? Reference the information above to work out what your problem is. The main culprits are misalignment, a broken key in the lock, the accumulation of dirt, corrosion or broken parts, or some combination of these.
2) Open the uPVC Window if Stuck Closed
In the case that your window is fully jammed, you’ll need to take extra care to open it. Begin by grabbing your equipment – a thin tool bent at 90 degrees (like an allen key) – and inserting it between the window and frame, and we can’t stress this enough, do this when the handle is in the open position.
Then you want to push towards the handle to grasp the shootbolt roller cam and release the shootbolts. If it’s jammed on both sides, simply repeat on the other end of the window. Hey presto! The window should now open, allowing you to fix the source of the problem.
3) Clean and Lubricate the Locking Mechanism
If the internal mechanism is seized up, it could be that dirt and debris have the shootbolts and rollers stuck. The obvious solution is to give them a good clean. Using a soft cloth, add plenty of lubricant and dry off once done.
If there’s big bits of debris, for example, a piece of broken key, you should use thin pliers or a small flathead screwdriver to delicately pull it out before lubrication.
4) Replace Any Damaged Parts (If Necessary)
This part might not be necessary if it’s a simply a matter of the internal parts being blocked by an accumulation of dirt, so you can skip this step if the mechanism looks in good condition.
For older, subpar locks that have rusted or fractured, you will want to replace the gearbox entirely. To do this, remove the window handle with your screwdriver and loosen the shootbolts. Here, you will be able to slide the old gearbox out, before replacing it with a new one in exactly the same way, just sliding it in – just make sure you’ve got it the right way round.
5) Realign, Reassemble and Check Functionality
Finally, you can secure any loosened parts and put everything back in place with the screwdriver, making certain that the lock mechanism and window are aligned perfectly. Get those screws tightened nicely and don’t forget to check for any resistance or looseness in the window operation. When satisfied, you can close the window again with the peace of mind that it’s nice and secure.
uPVC Window Lock Maintenance
To prevent things from going downhill in future, it’s best to implement an effective maintenance regime for your uPVC window locks. Luckily, this won’t take up too much time and, crucially, it’s a straightforward way to reduce the likelihood of burglaries.
Regular Cleaning
Think of periodic cleaning as the foundation for a long-lasting and functional window locking mechanism. This is because in giving it a good clean you’re removing any dirt and debris that might otherwise build up in the tiny spaces in the lock, preventing optimal performance. You can do this with some mild soap and a cloth, making sure you dry it off afterwards so there’s no moisture accumulation.
Occasional Lubrication
Things getting stiff with your window mechanism? Then it’s time to do a bit of lubrication – usually, this will involve popping a bit of WD-40 or graphite powder into the lock by slipping it in with the key. While you’re at it you might also want to apply some of the WD-40 to the hinges for smooth movement. As a rule of thumb, you probably should do this TLC every 3-6 months, depending on the stiffness of the operation.
Keeping an Eye Out for Damage
This one is an obvious tip, but in the humdrum of routine or the chaos of life admin, it’s easily forgotten. Make sure to inspect your window for signs of damage from rust and corrosion from time to time to avoid the worst of the damage. You can even invest in anti-rust products for a bonus defence against the elements.
Getting the Alignment Right
Things like house settling, windows slamming in the wind and general wear & tear can all lead to a window’s locking mechanism becoming misaligned over time. Therefore, it’s your job to check it’s all properly in place when you’re able.
If you do notice any discrepancies, don’t worry, this often can be a simple job – tightening a few screws or gently pulling it back in place. If the problem doesn’t fade, you should seek out a window pro to secure your windows before any further damage occurs.
Opting for a Professional Fix
Truth be told, the easiest way to ensure longevity when it comes to repairing the locks on a uPVC window is to opt for a professional to fix it. This way, you ensure a quality fit from the get-go and can rest assured it will be a long time before you need to get out the screwdriver again.
Still Struggling?
We get it – DIY isn’t for everyone. So, if you’re still uncertain about the process of fixing a uPVC window locking mechanism or need a general helping hand, be sure to get in touch. At the York Locksmith Company, we’re all about top-notch service and a friendly face.
