How to Clean uPVC Windows

How To Clean uPVC windows

Brand new upvc doors, windows and conservatories look great, but what happens once they start to get dirty? We run through some of the most important dos a don’ts when it comes to cleaning frames, glass and window sills.

uPVC windows are one of the most common forms of window frames nowadays. They are recognised for their energy efficiency, soundproofing capabilities, and security measures.

Window frames made of uPVC are very long-lasting (see also ‘How Long Do UPVC Windows Last?‘). Unlike wood and aluminium, they have anti-rusting properties and do not corrode as well.

White uPVC windows are the most common colour option for houses, mostly due to the reduced cost and the minimalistic appeal. As appealing as they may look, their crisp white appearance is bound to get battered by the weather and fade over time.

In this article, we’ll show you how to clean uPVC windows (see also ‘Can You Paint UPVC Doors And Windows?‘) to bring them back to their former glory. Let’s dive in!

Things you’ll need

  • Warm water
  • Spray bottle
  • Window lubricant
  • White vinegar
  • A soft cloth
  • Vacuum

Steps to clean uPVC windows 

  • Cleaning Hinges

Hinges are the most difficult element of a window to clean since they are not easily accessible, but here’s how to do it quickly and easily:

  •  Opening the window

Start by opening the window as wide as you can. While doing so, make sure you don’t break the hinge.

  • Dust Cleaning

Remove any dust and dirt from the hinge mechanism with the help of a vacuum cleaner. For this process, the ideal vacuum cleaning nozzle would be the one equipped with a soft dusting brush, as it will prevent you from scratching the surrounding area while you are cleaning it.

  • Oiling

Once the hinge is clean, it is essential to make its movement smoother if your window is a touch stiff to open or close. You can do so with the help of specific lubricants or multi purpose oil.

Cleaning a uPVC Window Frame

The first step is to wide open the window for easy cleaning. Having it at a 45 degree angle ensures best visibility allowing you to clean off all those light stains.

  • Dust Removal

Vacuum the inside of the frame, to remove any accumulated dirt and debris. Make sure you use the vacuum in a to-and-fro motion and not point it at one spot for an extended period of time. Doing this can damage the pane edge.

  • Be aware of Mould growth

While cleaning the uPVC window frames, always look out for moulds. Mold can readily accumulate on the frame edges and should be properly cleaned in order to prevent it from spreading and worsening the frame material. To prevent the growth of mould, one can use specialised mould spray.

  • Mould Removal

Now remove the mould from the surface by wiping it with a clean cloth or paper towel. Allowing a consistent flow of fresh air will also help to maintain the space by keeping it free of moisture and preventing the growth of mould in the region. Thus, we advise against keeping the windows closed for an extended period of time.

  • Tip : DIY Chemical Spray

One can easily make the anti-mould growth spray at home by using one part bleach and three parts warm water in a spray bottle. Here’s how.

Cleaning Window Panes

  • Prepare the cleaning liquid

Take a bowl of warm water and a few drops of dishwashing liquid in the same container to make the cleaning formula.

  • Wipe the window pane

With the help of a cleaning formula and a soft cleaning sponge or cloth, wipe the window pane with soft hands in order to clear the fingerprints or accumulated dust on the window.

  • Removing Excess Water

Wipe away excess water droplets on the window pane with the help of a dry towel, kitchen roll, or cloth.

  • Final Touch

To get rid of those smears and streaks on your window panes, use a newspaper soaked in a solution made of 1/4th cup white vinegar, ½ cup of water, and ½ cup dishwashing liquid mixed together. For cleaning, wipe the window glass with the newspaper in a circular motion.

Things to Avoid

When you employ the wrong cleaning techniques or chemicals, you can quickly cause irreparable damage to your uPVC windows by scratching them or destroying the shine from their surface. To be certain that you’re utilising materials that are acceptable for the task at hand, while cleaning a uPVC door, stay away from products such as:

  • Scouring pads and abrasive cleaners
  • White spirit
  • WD40 (Wood Degreaser)
  • Iron wool

Cleaning FAQs

What materials should I use to clean uPVC?

When cleaning uPVC windows, it’s crucial to use non-abrasive tools and chemicals to avoid scratching the surface. Although a sponge or soft cloth dampened in warm soapy water will be effective in removing most of the filth, specialised uPVC cleaning chemicals are also effective if you want to remove even the most tenacious layers of dust off uPVC surfaces.

Do I need a professional to clean uPVC windows?

Because uPVC is such a low-maintenance material, you should be able to keep your windows sparkling without the assistance of a professional, providing that you utilise the proper cleaning procedures and products.

If you are concerned about harming your windows, then you should seek the help of a professional window cleaner.

How can I polish scratches out of uPVC?

Using a soft microfiber cloth, apply a little quantity of a brass cleanser that contains petroleum distillate and ammonium hydroxide to the brass surface. Apply a few drops of brass cleanser to the cloth and gently wipe the scratch with it in a circular motion, as if you were polishing the brass.


The fact that uPVC windows are weather resistant does not keep them from collecting dust and losing their lustre with time. However, with the correct cleaning technique and supplies, you can restore them to their condition in no time.

Because uPVC windows are resistant to the bulk of ordinary filth, they will not only save you money on energy, but they will also save you time.

After reading through this guide on cleaning uPVC frames, you should be able to restore the glory of your house and be proud of the uPVC features on your windows.

Looking for more info on high quality, well-maintained windows?

Check out our guide to FENSA, the UK’s government appointed organisation that makes sure building regulations for replacement windows and doors are properly followed.

Matt James

Matt James

Hi, Matt here! I started out almost 20 years ago as a teenager working in the family business fitting doors, windows and conservatories. I now run this website to share the best tips and advice for anyone looking to get a good deal on double glazing.

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