01603 763189 | [email protected]

How to Clean UPVC Window and Doors Frames

upvc window cleaning

UPVC windows are a popular choice for many homes today thanks to their durability, energy efficiency, and low maintenance requirements. However, to keep your UPVC windows looking their best, regular cleaning is essential. Here’s a comprehensive guide on how to clean UPVC window frames, panes, and sills quickly and easily.

Why Regular Cleaning of UPVC Windows Is Important

While UPVC windows are designed to be long-lasting and low-maintenance, they still require regular cleaning to keep them looking pristine and working properly. Over time, dirt, grime, mold, and mildew can build up on the frames, glass, and seals. Not only does this look unsightly, but it can also lead to damage if left unchecked.

Regular cleaning keeps the glass clear for better visibility and light transmission. It also prevents the growth of mold and mildew which could spread to window seals and frames. Eventually, this could cause rot, leaks, and drafts. Lastly, washing UPVC windows routinely protects them from UV damage caused by the sun’s rays. A good clean improves longevity.

How Often Should You Clean UPVC Windows?

Experts recommend cleaning UPVC windows at least once every 2-3 months. This helps prevent the buildup of stubborn dirt and debris. For UPVC windows in high-traffic areas or exposed to the elements, monthly cleaning is better.

Wash windows whenever you notice accumulated grime, spots, or environmental stains. It’s easiest to clean UPVC windows before dirt becomes heavily encrusted so aim for frequent light cleaning sessions.

What You’ll Need To Clean UPVC Windows

Cleaning UPVC windows is a simple process that doesn’t require many supplies. Here are the basic items you’ll need:

  • A soft sponge or microfiber cloth
  • Mild liquid soap or dish detergent
  • Water (warm water works best)
  • UPVC cream cleaner or window/glass cleaner (optional)
  • An old toothbrush for hard to reach areas (optional)
  • Squeegee to dry glass

Never use abrasive scouring pads or brushes on UPVC. Avoid solvents, bleach, hydrochloric acid, or other harsh chemicals that could damage the frames.

Step-By-Step Guide To Cleaning UPVC Windows

Follow these steps to properly clean all parts of your UPVC windows:

1. Prepare your window cleaning solution

Mix a few drops of mild liquid soap or dish detergent into a bucket of warm water. If needed, add 1 part vinegar to 4 parts water for extra cleaning power. Alternatively, use a specialized UPVC window cleaning spray.

2. Clean the UPVC window frames and sills

Dip a soft sponge into your cleaning solution and wring it nearly dry. Gently wipe down all UPVC window frames, sills, and window boards with the damp sponge. Rinse regularly in clean water.

Make sure to scrub any dirty spots and wipe away grime around hinges or locks. Use a toothbrush to clean in crevices. Avoid saturating window seals with water.

3. Wash the window panes

Apply the window cleaning solution directly to glass panes with a sponge or soft cloth. Wipe in “S” shaped motions horizontally first, then vertically.

Rinse the sponge frequently to prevent scratching the glass. Pay extra attention to the corners of the panes.

Use a squeegee on the glass starting from the top corner downwards to avoid streaks. Wipe away any pooled water on sills or frames.

4. Inspect and double check seals & rubbers

Closely inspect all window seals and rubbers around the perimeter of the sash after cleaning. Make sure no dirt or moisture remains.

Reapply your window cleaning solution or rub a bit of talcum powder on rubbers to ensure they don’t become fuse to the frame.

5. Leave windows open to dry completely

After washing, open your UPVC windows wide to allow the sills, seals, and frames to dry fully. Ensure no water is trapped anywhere on the window before closing them up.

Tips For Cleaning Tricky UPVC Window Stains

Beyond routine window washing, you may occasionally deal with tough stains on your UPVC windows that require extra elbow grease. Here are some tips for tackling common stubborn window stains:

  • Mold & Mildew – Use warm, soapy water or a diluted bleach spray. Avoid abrasives.
  • Bird Droppings – Soften with water and gently scrape off. Rinse immediately.
  • Tree Sap & Bug Guts – Apply baby oil and let sit before wiping away.
  • Construction Dust – Wipe with a microfiber cloth dampened with window cleaner.
  • Hard Water Spots – Clean with a 50/50 vinegar and water solution.

For truly difficult stains, seek out specialized UPVC window cleaning products. Always test cleaners on a small area first to check for any damage to the frames.

Must-Know Do’s and Don’ts For Cleaning UPVC Windows

To keep your UPVC windows looking their best, follow these simple do’s and don’ts whenever you clean:


  • Use soft microfiber cloths, sponges, or brushes
  • Stick to mild soap, water, vinegar, and plastic-safe cleaners
  • Dry windows and frames fully after washing
  • Dust windowsills and wipe off marks regularly
  • Inspect and maintain seals & rubbers


  • Use abrasives like steel wool or scouring pads
  • Apply bleach, strong acids, or alkalis
  • Power wash or spray windows with a high-pressure hose
  • Scrub too hard on glass or frames
  • Leave any moisture on frames or seals

Avoiding harsh chemicals and abrasives is key to keeping your UPVC frames intact and your glass panes scratch-free.

Know When To Call In a UPVC Window Cleaning Professional

While DIY cleaning can keep your UPVC windows looking good, it’s smart to call in a professional window cleaning service annually or bi-annually. Professionals have specialized tools, cleaning solutions, and techniques to thoroughly clean:

  • Windows in hard-to-reach second story or higher locations
  • Windows with exterior screens that are tricky to remove
  • Foggy or coated glass like low-emissivity or self-cleaning glass
  • Windows with stubborn stains built up over time

Look for an insured window cleaning pro that specializes in UPVC windows. They can give your windows a deep clean while keeping frames intact.

Keep Your UPVC Windows Looking New with Regular Cleaning

With their durability and insulating properties, UPVC windows are designed to provide decades of hassle-free use. But regular cleaning is essential to keep them looking pristine and prevent damage.

Wash frames, glass panes, seals and sills every few months with mild cleaners and soft clothes. Avoid harsh chemicals and abrasives. Call in pros annually for deep cleaning.

By keeping your UPVC windows clean, you’ll enjoy crystal clear views and properly functioning windows for years to come.

Key Takeaways

  • Clean UPVC windows every 2-3 months to prevent dirt buildup and stains
  • Use mild soap, water, and vinegar solutions. Avoid harsh chemicals.
  • Gently wash frames, seals, sills, and glass panes. Be extra careful around seals.
  • Dry everything fully after washing. Leave windows open for airflow.
  • Tackle tough stains with specialized cleaners and extra elbow grease
  • Have professionals deep clean annually for squeaky clean windows
  • Regular cleaning keeps UPVC windows looking pristine for decades


Keeping your UPVC windows clean doesn’t have to be a chore. By following these simple cleaning tips and techniques, you can easily wash away dirt, grime, and stains from frames, glass, and sills. Regular upkeep will keep your windows looking crystal clear and functioning properly for many years to come. Your home will benefit from improved visibility, better insulation, and protection against mold and mildew growth.

So grab your cleaning supplies, crank open those UPVC windows, and get scrubbing – a bright, refreshed home view awaits! Consistent, gentle cleaning is key to preserving your windows’ pristine condition and ensuring they continue providing beauty and performance.



Leave a Replay

About Us

Astframe is a uPVC Windows & Doors manufactured based in Norwich.

We supply a range of premium quality products including uPVC Windows, Doors, and Conservatories. Aluminium Bi-Folding Doors, Patio Doors.

Recent Posts

Follow Us

Check out our new CompOsite Door Designer

Go on give it a try…