UPVC windows are one of the most popular choices for homeowners across the UK. They are low maintenance, durable, energy efficient and designed to last for decades. Yet, like any part of a property, they are not immune to wear and tear. Handles get loose, locks fail, hinges rust, seals wear down and glass units fog up. When these issues appear, they are more than just an annoyance. They can compromise your home’s security, waste energy and make your living spaces uncomfortable. As specialists in UPVC window repairs, at Repair UPVC we deal with these problems every single day. What I want to share with you here are the most common problems we see, why they happen, and what you can do to prevent them becoming a bigger issue.
Handles That Fail or Break
Window handles are used day in, day out, and naturally over time they become one of the first components to fail. A loose or broken handle makes it difficult to open or close your window properly. In some cases the handle won’t move at all, leaving your window stuck shut. In others, the handle spins but does not engage the locking mechanism, leaving your home insecure. A handle replacement is usually straightforward and inexpensive. At Repair UPVC we carry a wide stock of replacement handles that match most designs, so we can often fit a new one in a single visit. To avoid handle problems, try not to force your window closed when it is sticking. If it resists, the problem is often the hinges or mechanism, not the handle itself.
Faulty Window Locks
Security is one of the main reasons people invest in UPVC windows, but if the locking system fails it undermines the whole point. Espagnolette (espag) locks are the most common type found in UPVC windows, and they work in tandem with the handle to secure the sash. Over time, parts of the lock can wear out, jam or even snap. When this happens, your window may no longer lock, leaving your home at risk. According to ONS burglary statistics, 76 per cent of burglaries in England and Wales involve entry through a door or window, so making sure your locks are secure is essential. If you notice your window is not locking properly, don’t leave it until later. Call in a professional. At Repair UPVC we can replace faulty locks quickly and restore full security to your home.
Hinges That Rust or Fail
UPVC windows rely on friction stay hinges to open and close smoothly. Over time, these hinges can rust, seize up, or wear to the point where the window no longer sits properly in its frame. You may notice draughts, difficulty opening the window, or a visible gap when it is shut. Failed hinges are also a major cause of windows that stick or scrape against the frame. Left unfixed, worn hinges can cause further damage to the sash and frame. Replacing hinges is a common repair, and one that makes an immediate difference to the performance of your windows. We always recommend having hinges checked if you feel a draught or notice your window doesn’t align as it should.
Stuck or Jammed Windows
One of the most frustrating problems for any homeowner is a window that refuses to open. In many cases, this is down to a failed espag mechanism inside the sash. Sometimes it is due to dirt and debris clogging the track, or paint and sealant applied during redecorating. A jammed window is not just inconvenient. It is a safety hazard, especially if it is one of your designated fire escape windows. At Repair UPVC we deal with jammed windows regularly. Often, the fix involves freeing or replacing the espag mechanism, and ensuring the hinges and locks are working in harmony.
Worn or Failing Seals
UPVC windows rely on rubber gaskets and weather seals to keep out draughts and moisture. Over time these seals flatten, crack or perish, leaving gaps where cold air and water can creep in. A worn seal might not seem like a big problem, but it can significantly reduce the energy efficiency of your home. The Energy Saving Trust notes that draught-proofing around windows and doors can save the average household up to £60 per year on heating bills. Replacing seals is one of the simplest repairs, but it makes a huge difference to comfort levels. At Repair UPVC we fit new seals that restore your window’s original performance and stop costly draughts.
Misted or Fogged Double Glazing
One of the most common issues we see is misted glass. This happens when the seal around a double glazing unit fails and moisture seeps between the panes. The result is condensation that you cannot wipe away, leaving the glass permanently cloudy. Not only does this ruin the appearance of your window, it also reduces insulation. The good news is you do not need to replace the entire window. At Repair UPVC we can replace just the failed glass unit, keeping the existing frame intact. This is far more cost effective than full replacement and restores clarity and energy efficiency in one go.
Tilt and Turn Mechanism Problems
Tilt and turn windows are popular for the flexibility they offer, but their mechanisms are more complex than standard casements. When something goes wrong, the window can get stuck in one position, or worse, swing open uncontrollably. This can be dangerous, especially in upper floor windows. Most tilt and turn problems come down to worn gearing or incorrect adjustment. A skilled repair involves resetting or replacing the faulty parts so the window once again tilts and turns as it should.
How to Prevent Common Problems
While some issues are inevitable as windows age, a little care goes a long way. Here are a few tips that help extend the life of your UPVC windows:
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Clean and lubricate moving parts like hinges and locks once or twice a year with a silicone-based spray.
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Avoid slamming windows shut, as this puts strain on the handle and lock.
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Keep drainage channels clear of dirt and debris to prevent water build-up.
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If your window starts to resist closing, do not force it. This can make the problem worse. Call in a professional before further damage occurs.
Why Professional Repairs Matter
It might be tempting to attempt a DIY repair, but modern UPVC windows are precision-built systems where the handle, lock, hinges and seals all need to work together. An unskilled repair can easily cause further damage, and in some cases void your warranty. Professional repairs are not just about fixing the immediate problem. At Repair UPVC we always carry out a full assessment of the window to check for hidden issues. For example, a sticking handle might be a symptom of a failing lock or hinge. Fixing the root cause saves you time and money in the long run.
Trust Repair UPVC for Your Window Repairs
We take pride in helping homeowners get the very best from their UPVC windows. Whether it is a simple handle replacement, a tricky lock repair, or a full glass unit swap, we approach every job with the same attention to detail. Our aim is to restore your windows so they are secure, energy efficient and smooth to use.
If you are currently struggling with any of the problems described in this article, don’t wait for things to get worse. A quick, professional repair is often all that’s needed to bring your windows back to their best. Contact Repair UPVC today for friendly advice and a free, no-obligation quote. Your home deserves windows that work properly, and we are here to make that happen.