How to Maintain Your uPVC Windows and Doors

When it comes to maintaining a comfortable, secure, and energy-efficient home, your choice of windows and doors plays a significant role. In the UK, uPVC windows and doors have become a go-to solution for homeowners thanks to their affordability, durability, and low maintenance. But “low maintenance” doesn’t mean “no maintenance.”

Regular upkeep not only helps extend their lifespan but also keeps your home looking its best. Whether you’ve recently completed a windows installation or you’ve had your units for years, this guide will walk you through everything you need to know about maintaining your uPVC fittings properly.

1. Regular Cleaning: The Key to Lasting Shine

Cleaning your uPVC windows and doors at least twice a year helps prevent discolouration, build-up of grime, and surface damage. Use a soft cloth or sponge with warm, soapy water. Avoid abrasive creams or scouring pads - they can scratch the surface and damage the glossy finish.

For stubborn marks, a small amount of white vinegar mixed with water can help lift stains without harming the material. Avoid using bleach or ammonia-based products, especially around coloured uPVC, as these can cause fading.

Don’t forget the frames - dirt and debris can gather in corners and cause seals to weaken over time. A simple toothbrush can help you get into tricky areas without causing damage.

2. Caring for the Glass and Seals

While the frames may be uPVC, the glazing still needs attention. Use a quality glass cleaner or a vinegar-water solution to remove smudges, bird droppings, and dust. Clean on a cloudy day if possible - sunshine can dry the cleaner too quickly and leave streaks.

Pay close attention to rubber seals and gaskets. These ensure the airtight and watertight performance of your windows and doors. Keep them free from dirt and gently wipe them with a damp cloth. You can apply a specialist rubber conditioner or a touch of petroleum jelly every few months to stop them drying out or cracking - an often-overlooked part of windows installation maintenance.

3. Lubricate Hinges, Locks and Moving Parts

Over time, the hardware on your uPVC windows and doors - including locks, handles, and hinges - can become stiff or squeaky. Applying a silicone-based lubricant or WD-40 to the moving parts every six months will help them stay smooth and silent.

Be careful not to over-lubricate. Too much oil can attract dust and grime, leading to future issues. Always wipe away excess lubricant with a clean cloth.

Security is another important consideration. Well-maintained locks and handles not only operate better but also help protect your home. If you ever notice difficulty locking or unlocking a window or door, don’t force it - get it checked before more serious damage occurs.

4. Drainage Channels and Ventilation: Often Ignored but Essential

Your uPVC windows and doors are designed with built-in drainage channels to carry rainwater away from the frames. These tiny holes are usually located at the bottom of the frame and can become blocked with leaves, dust or insects.

Use a cotton bud or a small brush to gently clear any debris. Keeping these channels clear helps avoid water pooling inside the frame, which can lead to damp or even internal leaks.

Trickle vents - those small adjustable vents at the top of many windows - are vital for airflow and reducing condensation. Open and clean them every few months. Maintaining good ventilation is especially important in UK homes to combat our damp climate.

5. Addressing Minor Damage Before It Becomes a Major Problem

Even though uPVC windows and doors are tough, small issues can still crop up - especially in homes near the sea (due to salt) or urban areas (due to pollution). Common problems include:

• Hairline cracks in the frames

• Peeling sealant

• Discolouration or yellowing over time

Hairline cracks should be examined by a professional, as they can allow moisture to enter the frame or wall cavity. Sealant can be safely removed and replaced with fresh, mould-resistant exterior sealant to keep your installation weathertight. And for discolouration, a specialist uPVC cleaner is your best bet.

6. Seasonal Checks for All Windows and Doors

Changes in weather and temperature can affect the performance of uPVC materials. Seasonal maintenance ensures your home remains warm in the winter and cool in the summer.

In spring and autumn, walk around your home and check:

• That all locks engage smoothly

• There are no drafts or gaps around the edges

• The seals are intact and not perished

• No signs of condensation between glazing panels (a sign of a failed sealed unit)

This proactive approach will keep your home secure and energy-efficient all year round, and it gives you the chance to spot minor issues before they become expensive fixes.

7. Professional Maintenance vs DIY: When to Call the Experts

Many tasks, like cleaning and lubrication, are safe for DIY. However, if you notice more serious problems - like windows that won’t shut properly, water ingress, or warped frames - it’s best to call a professional.

An experienced windows installation expert can assess the structural integrity of your uPVC fittings, recommend replacements where needed, and ensure the longevity of your investment.

Annual servicing, particularly for uPVC doors and any large sliding or bifold systems, is often worth the small fee for peace of mind.

8. Tips to Maximise Security While Maintaining Your uPVC Fixtures

Keeping your windows and doors in great condition also means protecting your home. Here are a few bonus tips to enhance security:

• Check that multi-point locks are functioning on all doors

• Ensure child restrictors on upstairs windows are in place and not damaged

• Consider adding security film to glazing for added protection

• Install sash jammers on windows for an extra locking point

Regular maintenance supports security. If a handle feels loose or a lock doesn’t ‘click’ the way it used to, it might be time to replace the hardware.

9. Boosting Curb Appeal with Well-Maintained uPVC Frames

Clean and well-maintained uPVC windows and doors significantly boost the visual appeal of your home. In fact, many UK homeowners have found that simply refreshing the appearance of their windows has added value to their property during resale.

You can also take things further by:

• Replacing faded or outdated handles with modern alternatives

• Upgrading to energy-efficient glass without changing the frames

• Refreshing external sealant or repainting surrounding brickwork

Remember, first impressions matter - especially for potential buyers or guests.

Maintenance is Simpler Than You Think

Looking after your uPVC windows and doors doesn’t need to be a daunting chore. With regular cleaning, a little seasonal care, and the occasional expert check-up, your investment can last decades.

In fact, good maintenance ensures that your windows installation continues to perform efficiently, saves you money on heating, and maintains your home’s appearance and security.

Whether you’re in the market for new windows or simply want to extend the life of your current uPVC fittings, start treating maintenance as a regular part of your home care routine. It’s a small effort that makes a big difference.

Need help with maintenance or thinking about upgrading?

Get in touch with our expert team - we’re proud to serve homes across Hertford, Hitchin, Stevenage, Biggleswade, Cambridgeshire, Welwyn Garden City, Letchworth Garden City, Harpenden, Potters Bar, Barnet, Hatfield, Hertfordshire, Knebworth, London, Cuffley, Shefford, Henlow, St Albans, Cambridge, Bedfordshire, and the surrounding areas - providing trusted advice, quality installations, and long-lasting results.