How Do You Clean a UPVC Conservatory?

Lenard Nagy
Apr 30, 2025

A UPVC conservatory is a fantastic way to enjoy natural light and your garden all year round, but like any part of your home, it can gather dirt, algae, and general grime over time. If you’ve ever wondered, “How do you clean a UPVC conservatory?,” you're in the right place! 

Here’s a simple, easy-to-follow guide to help you do just that.

What You will Need?

Before you get started, grab these essentials to make your cleaning process smooth and efficient:

  • A soft-bristle brush or broom
  • Microfibre cloths or sponges
  • A bucket of warm water
  • UPVC cleaner or mild detergent
  • White vinegar (for stubborn marks)
  • A squeegee (for windows)
  • A telescopic pole (for those hard-to-reach spots)
  • A pressure washer (optional—use carefully!)

Step-by-Step Guide on Cleaning Your UPVC Conservatory

1. Start with a Dry Brush Down

First things first, grab your brush and clear away cobwebs, leaves, and loose dirt from the roof, frame, and window ledges. It’s important not to use water just yet—this dry brush down will make everything much easier and more effective when you do start cleaning. If your conservatory has high spots, consider using a telescopic brush to reach those areas safely.

2. Tackle the Frames

Now that you’ve cleared away the bulk of the debris, it’s time to focus on the frames. Mix some warm water with a splash of UPVC cleaner or mild detergent. Dip a soft cloth or sponge into the solution and gently wipe down the frames, both inside and out. Avoid using abrasive materials, like scouring pads, as these can scratch the surface of your UPVC.

Pro Tip: 

For those pesky stains or mould, apply a little white vinegar to a damp cloth. Let it sit for a few minutes, then wipe it away. It’s a simple yet powerful solution for tough spots!

3. Clean the Glass or Polycarbonate Panels

Next, it’s time to clean the glass or polycarbonate panels of your conservatory. Use a gentle glass cleaner or warm, soapy water to wash the panels. A squeegee will help you avoid streaks, especially on the roof or any slanted panels. If you’ve got polycarbonate roofing, be sure to steer clear of harsh chemicals as they can damage the material. 

Take your time to do this properly, and your conservatory will look as good as new!

4. Pay Special Attention to the Roof

The roof of your conservatory is where grime, algae, and moss tend to build up most, especially if it hasn’t been cleaned in a while. If it’s safe to do so, use your telescopic brush with warm, soapy water to scrub it down. If there are any tough spots, a pressure washer on a low setting can help, but be careful. Never aim the pressure washer directly at seals or edges, as this could cause water to seep into areas where it shouldn’t.

Safety Tip: 

Always prioritize safety when cleaning the roof. If it's too high or difficult to reach, don’t hesitate to hire a professional to do the job safely and effectively.

5. Rinse and Dry

Once everything has been scrubbed and cleaned, rinse down your conservatory with fresh water to remove any leftover soap or residue. After rinsing, it’s time to dry. Use a clean microfibre cloth or squeegee to dry the frames and windows. This step is crucial to prevent streaks and watermarks from forming, ensuring a crystal-clear finish.

6. Clean the Gutters

Lastly, don’t forget about your gutters! Over time, leaves, twigs, and debris can build up in the gutters, potentially causing blockages or water damage. Cleaning the gutters while you’re already up there is a great way to prevent any unwanted issues down the road. Use a small broom or scoop to remove any debris, and your conservatory will thank you.

How Often Should You Clean Your UPVC Conservatory?

To keep your conservatory looking its best, aim for a full clean at least twice a year—in Spring and Autumn—as these seasons will help prepare your conservatory for the warmer and cooler months. 

Between deep cleans, try spot-cleaning any areas that seem to get dirty faster, which will make the bigger clean easier and more manageable.

What to Avoid?

When cleaning your conservatory, be sure to avoid the following to prevent damage:

1. No bleach or harsh chemicals: 

These can discolor your UPVC and damage the seals around windows and doors.

2. Avoid abrasive pads or metal tools: 

These can scratch the surface of your conservatory, making it more prone to dirt and stains.

3. Don’t ignore the roof: 

While it’s easy to overlook, cleaning the roof regularly will make a big difference in the overall look of your conservatory.

Need Professional Help? 

Cleaning your conservatory doesn’t have to be a chore, but if you’d rather leave it to the experts, Perfect Clean is here to help! With years of experience in professional cleaning services, they can make your conservatory sparkle without the hassle. 

Get in touch with Perfect Clean today and enjoy a sparkling conservatory, stress-free!

Conclusion 

Regular cleaning is key to maintaining a beautiful, long-lasting conservatory. By following these easy steps, you’ll ensure your UPVC conservatory stays in top condition and continues to shine for years to come. So, the next time someone asks, "How do you clean a UPVC conservatory?", you’ll have all the answers you need!

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Frequently Asked Questions

How often should I clean my UPVC conservatory?

It’s recommended to clean your UPVC conservatory at least twice a year, typically in spring and autumn. These seasons help prepare your conservatory for the changing weather. In between, try spot cleaning areas that get dirty quicker to keep it looking fresh.

Can I use bleach to clean my UPVC conservatory?

No, bleach should be avoided when cleaning your conservatory. Harsh chemicals like bleach can discolour your UPVC and damage the seals around windows and doors. Stick to mild detergents or UPVC cleaners for the best results.

What’s the best way to clean the roof of my conservatory?

Use a telescopic brush with warm, soapy water to scrub down the roof. For tough spots, a pressure washer on a low setting can help, but be very careful not to aim the water at seals or edges to avoid causing water damage.

Can I use a pressure washer on my conservatory?

You can use a pressure washer, but it must be on a low setting. Be careful not to direct the water at seals or edges as this could cause leaks. Always follow safety guidelines when using a pressure washer, especially on the roof.

How do I remove stubborn stains or mould from UPVC?

For stubborn stains or mould, apply a small amount of white vinegar to a damp cloth. Let it sit for a few minutes, then wipe it away. It’s an effective and natural way to tackle tough spots without damaging your UPVC.

What should I avoid when cleaning my conservatory?

Avoid using abrasive pads, metal tools, or harsh chemicals like bleach, as these can scratch or discolour your UPVC. Also, don't neglect cleaning the roof, as grime and moss can build up, making it harder to clean later.

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*FYI, parts of this blog post were drafted by artificial technlogy. But rest assured, it's been thoroughly researched, edited, reviewed and me & my team.