When it comes to choosing windows for your home, uPVC (Unplasticised Polyvinyl Chloride) is a standout material—thanks to its durability, thermal efficiency, and low-maintenance appeal. But like any home feature, even the most resilient uPVC windows need a little care to keep them performing and looking their best for years to come.

At Dosanjh Double Glazing Ltd, we know that quality windows are an investment, and with just a bit of regular maintenance, you can extend the lifespan of your uPVC windows significantly—while maintaining their energy efficiency, functionality, and curb appeal.

Here’s your comprehensive guide to maintaining uPVC windows and getting the most out of them.

1. Routine Cleaning: Keep It Simple, Keep It Consistent

One of the biggest advantages of uPVC windows is how easy they are to clean. Unlike timber, they don’t require painting or sealing. However, to prevent discoloration, grime build-up, and stiffness in moving parts, regular cleaning is essential.

How Often?

Ideally, you should clean your uPVC windows once every three months. More frequent cleaning may be required if you live in a coastal or urban area with higher pollution levels.

Cleaning the Frames:

• Use a soft cloth or sponge and warm soapy water (a small amount of mild dish soap works great).
• Gently wipe the frames to remove dust, dirt, and marks.
• Avoid abrasive cleaners, scouring pads, or solvent-based products, as these can damage the surface finish.

Cleaning the Glass:

• Use a non-streak glass cleaner or a mixture of vinegar and water.
• Wipe with a microfiber cloth or a squeegee to achieve a crystal-clear finish.

Pro Tip:

Never use bleach or harsh chemicals, especially on white uPVC frames—it can lead to yellowing or dullness over time.

2. Inspect Seals and Gaskets for Damage

The rubber gaskets around your uPVC windows play a crucial role in keeping them weatherproof and airtight. Over time, these seals can become loose, brittle, or cracked—especially in areas with extreme temperature fluctuations.

Maintenance Tips:

• Check the seals every 6 months for signs of wear and tear.
• Clean them with a damp cloth to remove dust and debris.
• Apply a small amount of silicone lubricant or a specialist gasket conditioner to keep them supple and extend their life.

Replacement:

If the seal is damaged or missing, get it replaced promptly to avoid draughts, leaks, and heat loss.

3. Lubricate Hinges, Locks & Moving Parts

Your uPVC windows likely come with multi-point locking systems, hinges, handles, and other hardware. To keep everything operating smoothly and securely, these components should be lubricated regularly.

How Often?

Every 6 to 12 months, depending on usage.

What to Use:

• Apply WD-40 or a light machine oil to metal components.
• Avoid over-lubricating—just a small amount will do.

This small step not only improves usability but also prevents the metal parts from seizing up, rusting, or wearing down prematurely.

4. Check for Condensation and Ventilation Issues

Double-glazed uPVC windows are designed to reduce condensation, but it’s still important to monitor any signs of moisture between the panes or around the frames.

Causes of Condensation:

• Poor room ventilation
• Cooking, showering, or drying clothes indoors without extractor fans
• Damaged seals or failed glazing units

What to Do:

• Open windows regularly or use trickle vents to allow airflow.
• Use a dehumidifier in high-moisture areas like kitchens and bathrooms.
• If condensation appears between the glass panes, it may indicate a seal failure, requiring professional repair or replacement.

5. Monitor for Discoloration and Fading

Modern uPVC is UV-stabilised, meaning it resists sun damage much better than older versions. However, over time and with constant exposure, frames may start to look dull.

Restoration Tip:

• Use a uPVC cream cleaner or renovator to revive faded frames. These are designed specifically for white or coloured uPVC and help restore the original shine.
• For stubborn marks like bird droppings or plant sap, gently wipe them off as soon as possible to avoid staining.

6. Inspect Drainage Holes and Clear Debris

uPVC windows are designed with internal drainage systems to channel away any water that gets in through rain or condensation. These systems include tiny drainage holes located at the bottom of the window frame.

Why It Matters:

Blocked drainage holes can lead to water pooling, damp patches, and even mould growth inside your home.

How to Clean:

• Use a soft brush, cotton bud, or small piece of wire to gently remove any debris.
• Pour a small amount of water into the sill channel—if it doesn’t drain properly, the holes may be blocked and need clearing.

7. Tighten Loose Screws and Check Alignment

Over time, handles, locks, and hinges can loosen from regular use. This can lead to misalignment, difficulty in opening or closing, or security concerns.

Maintenance Steps:

• Inspect and tighten any visible screws with a screwdriver.
• If your window is difficult to open or doesn’t close tightly, it may need re-adjustment or realignment. This is a relatively quick fix and can usually be done without replacing any parts.

8. Protect During Home Improvements or Landscaping

If you’re painting, plastering, or gardening near your uPVC windows, take a few precautions to protect them from splashes, chips, or scratches.

• Cover the frames and glass with plastic sheeting or painter’s tape.
• Avoid using tools like pressure washers directly on the windows—they can damage seals or force water into unwanted places.

. Know When to Call the Professionals

While most uPVC window maintenance can be done yourself, some issues are better handled by professionals.

Contact your installer or a window specialist if you notice:

• Condensation between glass panes
• Damaged or broken locks or handles
• Significant draughts or poor thermal performance
• Cracks in the frame or warping

At Dosanjh Double Glazing Ltd, our experienced team is always here to help with inspections, repairs, and expert advice to keep your windows in peak condition.

Final Thoughts

uPVC windows are an excellent investment, offering long-lasting performance with minimal upkeep. By following these simple maintenance steps, you can keep your windows looking pristine, operating smoothly, and insulating your home efficiently for decades.

Regular attention not only protects your investment but also ensures your home remains secure, stylish, and energy-efficient, all year round.

Thinking of upgrading your windows or need help maintaining your current ones?
Contact Dosanjh Double Glazing Ltd today for professional support and high-quality window solutions you can rely on.