How to Clean uPVC Window Frames

uPVC frames, the most popular choice for window frames ever since the 80s, are generally easy to maintain and can last for years without requiring much upkeep. However, due to weather conditions, muck and debris inevitably build up over the surface. 

In rural locations where there isn’t much pollution, this can take up to a year, but in busier areas with lots of traffic, dirt can accumulate in only a couple of months.  

Not to worry, though: uPVC window frames are actually one of the easiest to clean, and a good scrub every now and again will help keep them looking fresh and crisp. We’ve put together this handy guide to let you know how to clean uPVC window frames in the most efficient way, as well as what not to do. We’ve also answered some of the most common questions when it comes to their upkeep.

• Before washing, use a soft brush or dry cloth to remove any loose dirt 
• Rinse the windows with clean water- a hose can help remove surface grime
• Create a warm solution with water and some soap (a bit of dishwashing liquid would also work)
• Use a soft cloth to wipe down the window frames and panes with the soapy solution; a toothbrush can help scrub hard-to-reach corners
• Finally, rinse with clean water again and wipe down with a microfibre cloth (this will prevent streaking)
• If you’d like to also clean the glass, you can do so using a specialised window cleaning spray (be careful not to spray this on the frames) 
• For a sparkly finish, slide a small plastic squeegee along the window surface from one side to the other, and then use old newspaper to dry it

Do: 

• Stick to a regular cleaning schedule (once every six months for rural areas, once every two to three months for busier locations)
• Wipe away condensation daily to prevent mould and mildew
• Regularly apply a small amount of multi-purpose oil to hinges and locks to keep them moving smoothly

Don’t: 

• Use bleach or ammonia-based cleaners on your window frames as they can cause discolouration
• Use abrasive sponges or scouring pads: those will scratch the surface
• Include nail polish remover in your cleaning solution as it contains acetone which can dissolve uPVC
• Scrub the frames with steel wool or wire brushes since they will permanently damage the finish 

In addition to being aesthetically unpleasing, mould can also lead to some serious health risks.

The best way to tackle mould on uPVC window frames is to either use a specialised mould spray or a mixture of one part white vinegar to four parts hot water. As vinegar is acidic, it is typically highly effective against a wide range of fungus species. Spray your mixture on the affected surface, wait for a few minutes, and wipe down using a soft cloth. 

Of course, simply removing the mould is only a surface solution, as you’ll also need to address the core reason it’s forming in the first place, which is usually excess moisture from condensation or humidity. To make sure mould doesn’t appear again, you’ll need to find and remove the cause.

Over time, uPVC frames can develop stains due to accumulated dirt, pollution, or even watermarks. To remove those, you can prepare the same vinegar solution mentioned above using one part vinegar to four parts hot water. Again, apply to the affected area and let the mixture sit for a few minutes before wiping it off. For stubborn stains, a paste made from baking soda and water can be applied, left for about 10 minutes and then scrubbed off. 

If those methods don’t succeed at removing the stains, a dedicated uPVC cleaner is another way to make your uPVC white again.

While steam cleaning can be effective at removing tough grime from window frames, it’s not the best method to use on uPVC ones. This is because the high temperature of the steam can weaken the uPVC material over time and cause warping or discoloration, so it’s best to stick with warm soapy water and a soft cloth. If you need some extra power, a specialised uPVC cleaner can be applied.

In case you still wish to use steam cleaning on your uPVC frames, make sure it’s on a low heat setting and avoid holding it too close to the surface.

You should never use bleach on uPVC windows as its harsh chemical composition will weaken and discolour the plastic, making it appear dull and causing yellow or brown stains to form if left for a longer time. If this happens, unfortunately there is nothing that can be done to reverse the damage. 

Make sure to stick with gentle cleaning solutions such as soapy water and to use non-abrasive cleaning tools to avoid scratching the surface.

Even though regular cleaning can help your windows look great for longer, there comes a time when the best option is to replace them. Whether there is damage or discolouration to the frames, or they are no longer providing sufficient insulation, sometimes new windows are the best solution.

RB Windows offers a wide range of energy efficient uPVC windows tailored to suit any home – modern or traditional. Our beautifully crafted windows not only complement the appearance of your home, but also help maintain a consistent temperature, reducing energy bills while keeping your space comfortable all year round.

To learn more, check out our range of uPVC windows, contact our team online, or call 01543 467146.