How to Clean Roof Windows Safely:

A Step-by-Step Guide 

Key Findings 

• Regular cleaning increases natural light and prolongs the lifespan of roof windows 

• Use a microfibre cloth, mild soapy water, and a spray bottle for best results 

• Centre pivot windows are the easiest to clean safely from the inside 

• Avoid harsh chemicals, abrasive particles, and metal scrapers 

• PVC and wooden frames require different cleaning approaches 

How to Clean Roof Windows Safely and Effectively 

Let’s face it, we all want a little more light entering our homes. So, the first thing we’re going to need is some windows. Sounds easy enough, right? But more specifically, we’re going to need some clean windows – and that is often easier said than done. Especially when we’re talking about those often hard-to-reach roof windows that can gradually build up dirt over time. 

Fortunately, our experts at Dakea know a thing or two about roof windows. As part of the Velux Group with 80 years in the industry, who could be better to put together a step-by-step guide running through the process? 

Whether you’re a homeowner or a professional advising clients, this guide will walk you through everything you need to know about how to clean roof windows and skylights – from the tools and techniques to use, to specific considerations for both PVC and wooden frames. 

The Best Way to Clean Roof Windows 

Cleaning your roof windows regularly ensures clear views, maintains energy efficiency, and prolongs their lifespan – plus, it lets more light into your home. In short, it’s a job worth doing. But before jumping straight in, it helps to be properly equipped for the task. Here’s what you’ll need: 

Tools & Materials: 

• Microfibre cloth or soft cloth 

• Spray bottle 

• Mild soapy water (a small amount of detergent or dish soap in warm water) 

• Clean water for rinsing 

• Plastic sheet or clean plastic sheet (to protect flooring) 

• Window cleaning pole (for hard-to-reach windows) 

• White vinegar or vinegar solution (for water stains and stubborn dirt) 

• Dry cloth for finishing 

Step-by-Step Roof Window Cleaning Process:

1. Prepare the Area

Lay a clean plastic sheet on the floor beneath the roof window to catch excess water or cleaning solution. This helps reduce excess moisture and protects your flooring.

2. Start with the Inner Pane

Open the roof window and begin cleaning the inner pane first: 

• Spray a mild cleaning solution onto the glass surface 

• Use a microfibre cloth in a gentle circular motion to remove dust and organic dirt 
• Rinse with clean water and dry with a soft cloth

3. Move to the Outer Pane

Centre-pivot roof windows can be rotated 180°, allowing easy and safe access to the outer pane from indoors: 

• Use the locking mechanism to secure the window in place 

• Repeat the cleaning process with soapy water or a vinegar solution for stubborn stains like tree sap or bird droppings 

Avoid: Abrasive objects, harsh chemicals, abrasive compounds, metal scrapers, or harsh bristles that can scratch the glass

4. Clean the Frames

The cleaning method for the frame depends on both the type of window frame and its material: 

How to Clean PVC Roof Windows 

PVC windows are popular in bathrooms and kitchens because they’re resistant to moisture and require minimal maintenance. That said, an occasional clean can still be beneficial to keep them looking their best. Here’s some advice on cleaning PVC roof windows. 

Cleaning Process: 

• Wipe the side frame and bottom of the side frame with a damp microfibre cloth 

• Use mild soapy water to clean away small dust particles and stubborn dirt 

• Avoid using abrasive particles or much pressure, which could damage the surface 

Tip: Check drainage channels during cleaning to prevent excess water build-up. 

How to Clean Wooden Roof Windows 

Wooden roof windows are typically found in living areas and bedrooms, offering a natural aesthetic and excellent insulation. 

Cleaning Process: 

• Use a soft cloth dampened with clean water to gently wipe the frame 

• Avoid excess water which can damage the finish and lead to long-term issues like rot or warping 

• Use a small amount of mild detergent for stubborn marks, but always follow the manufacturer’s instructions 

After cleaning, allow the wooden frame to dry fully and check for signs of damage such as peeling lacquer or discolouration. Spot repairs may be necessary to keep your window in good condition. 

Easy-Clean Glass with Titanium Dioxide Coating 

Many of our modern roof windows feature a titanium dioxide coating that simplifies cleaning. It’s a clever solution that saves you time and effort. 

When it rains, the hydrophilic properties cause the water to spread evenly across the surface, rinsing off the broken-down dirt instead of forming droplets. This produces fewer water spots and clearer views after rainfall.

In turn, this means there’s less manual cleaning required, it keeps your glass surface cleaner for longer, and is great for skylight windows or flat roof windows that are harder to reach.

Additional Tips for Cleaning Roof Windows 

Don’t: 

• Use a pressure washer on roof windows 
• Use harsh chemicals not intended for window glass 
• Clean in direct sunlight, which can cause water stains 

Do: 

• Inspect the window for signs of damage or wear during each cleaning 
• Clean at least twice a year 
• Consider hiring a professional window cleaner for high or difficult to reach windows

Who Are Dakea? 

At Dakea, we are roof window specialists who believe that high quality doesn’t need to be expensive. Our streamlined range covers everything from pitched and flat roof windows, to skylights, blinds, accessories, and flashing kits. 

We manufacture all our windows using top-quality raw materials, rigorously tested and backed by our market-leading up to 20-year guarantee when registered. Whether you’re working on a loft conversion, kitchen renovation, or new build, we’ve got a product to suit, at a price that makes sense. 

Dakea products are stocked in over 100 locations across the UK. 

Contact us on (+44) 20 3970 5080 or visit our website to find your local stockist. 

Roof Window Cleaning FAQs 

How often should I clean my roof windows? 

We recommend regular cleaning at least twice a year to maintain clear views and optimal energy efficiency. If you live in an area with lots of trees or bird activity, you may need to clean them more frequently. 

Can I use standard glass cleaner on my roof window? 

Yes, but ensure it doesn’t contain harsh chemicals or abrasive compounds. A vinegar solution or warm soapy water is often the best cleaning solution. 

What should I do if I spot damage while cleaning? 

If you notice cracks, water spots that won’t budge, or issues with the window seal, contact your installer or get in touch with us directly for advice.