Signs Your uPVC Windows Need Repair – Before They Fail

uPVC windows are designed to be durable, secure, and energy-efficient — but like any moving part of your home, they can wear over time. Many homeowners don’t realise their windows need attention until they stop closing properly, let in draughts, or become unsafe.

At Oakwood UPVC, we see the same common issues across South Wales every week. The good news? Most of them are quick, affordable repairs when caught early.

Here are the key signs your uPVC windows need repair before the problem gets worse.

1. Draughts Around the Window Frame

If you feel cold air coming through, this usually means:

• Worn or split window gaskets

• Hinges out of alignment

• A sash dropping or twisting

• Locking points not compressing properly

Even a small draught can increase heating bills and make a room uncomfortable. A simple hinge or gasket replacement normally fixes it.

2. Windows That Won’t Stay Open

If your top-hung or side-hung window keeps falling shut, it’s almost always caused by:

• Failed friction hinges

• Incorrect hinge pressure

• Warped or worn hardware

This is a very common repair. New hinges bring the window back to safe working order.

3. Difficulty Closing or Locking the Window

If the handle feels tight or the locking mechanism won’t engage easily, the window is out of alignment.

This can be caused by:

• Sagging hinges

• Worn internal gearbox

• Frame movement over time

• Incorrect compression on the seals

If left unattended, this can cause the gearbox to break — turning a cheap repair into a costly one.

4. Misting or Condensation Between the Glass Panes

Condensation between the panes means the sealed unit has failed (known as a blown unit).

This reduces heat retention and often gets worse over time.

See our detailed post about this issue.

The fix:✔

Replace the glazed unit, not the whole window. A fast and affordable job we carry out regularly.

5. Broken Handles, Locks or Mechanisms

uPVC window hardware doesn’t last forever. If you notice:

• A loose or spinning handle

• A lock that sticks

• A handle that lifts but doesn’t open the window

• Cracking or clicking noises

…it means the internal mechanism is worn.

We can replace the internal locking system without changing the window frame.

6. Visible Gaps or Light Around the Window

If you see daylight where the sash meets the frame, the window isn’t sealing correctly.

This can cause:

• Draughts

• Water ingress

• Security issues

• Heat loss

A simple re-alignment or hinge replacement normally solves it.

7. Water Leaks or Damp Around the Window

Leaks can be caused by:

• Perished seals

• Incorrect drainage

• Failed silicone

• Frame movement

• Blocked drainage ports

We check both the frame and the sealing system to identify the cause.

Why It’s Important to Repair uPVC Windows Early

Leaving window issues unresolved can lead to:

❌ Higher energy bills

❌ Excess moisture and mould

❌ Damage to plaster and sills

❌ Mechanisms snapping

❌ Full window failure

❌ Reduced home security

Most repairs cost far less if caught early often under £60 for simple hinge or gasket replacements.

Professional uPVC Window Repairs in Bridgend & South Wales

At Oakwood UPVC, we specialise in all aspects of uPVC repair, including:

✔ Hinges ✔ Handles ✔ Locks & mechanisms ✔ Draught fixes ✔ Gaskets ✔ Blown double glazing ✔ Adjustments ✔ Sill repairs ✔ Trickle vent upgrades

Whether you have a single draughty window or a full house that needs attention, we’re here to help.

Need a Repair? Message Us Today

We offer:

• Free quotes

• Fast turnaround

• Honest, no-pressure advice

• Over 12 years of industry experience

📍 Based in Bridgend📍 Covering South Wales

Oakwood UPVC

Local, reliable, and always happy to help.