VELUX windows are a fantastic addition to any home, providing natural light, ventilation, and energy efficiency. However, without regular cleaning and maintenance, they can become clouded with dirt, suffer from condensation, or even develop operational issues.
To keep your VELUX windows functioning at their best, it’s essential to clean both the glass panes, air filter, and flashing regularly.
This guide provides expert tips on cleaning techniques, preventing common issues, and maintaining your windows for the long term.
Essential Tools and Materials for Cleaning VELUX Windows
Before you start, gather the necessary tools to ensure a thorough and damage-free clean.
What You’ll Need:
- Soft, lint-free cloths or chamois leather
- Non-abrasive sponge
- Lukewarm water
- Mild, non-abrasive household cleaner (if needed)
- Vacuum with a soft brush attachment
- Protective plastic sheet (for nearby renovation projects)
What to Avoid:
- Abrasive cleaning pads or harsh scrubbing tools
- Chemical-based glass cleaners that can damage coatings
- Sharp objects that may scratch the glass
- Excessive water pressure or power washing
How to Clean VELUX Window Panes (Interior and Exterior)
Over time, dirt and grime can accumulate on your VELUX window panes, affecting visibility and light penetration. Regular cleaning ensures they remain clear and streak-free.
Cleaning the Exterior Pane
VELUX windows are designed for easy external cleaning. To access the outer glass:
- Rotate the window 180 degrees until the outer pane faces inward.
- Secure the sash by sliding the barrel bolt into the frame bushing—this keeps the window in place for safer cleaning.
- Use clean water and a soft cloth or sponge to wipe away dirt and debris.
- For stubborn marks, use a mild, non-abrasive cleaner.
- Dry the glass with a lint-free cloth or chamois leather to prevent streaks.
Cleaning the Interior Pane
- Wipe the glass with a microfibre cloth dampened with lukewarm water.
- For stubborn stains, apply a diluted, mild detergent, leave for a few minutes, then wipe clean.
- Avoid using excessive moisture to prevent water streaks and damage to surrounding materials.
💡 Tip: Always use soft water when possible, as hard water can leave mineral deposits on the glass. If hard water is unavoidable, wipe the pane dry after cleaning.
Electric VELUX Windows, supplied by Trade Warehouse
How to Clean and Maintain the VELUX Air Filter
VELUX windows feature built-in air filters that trap dust and pollutants. Keeping these filters clean ensures better ventilation and air quality inside your home.
Step-by-Step Air Filter Cleaning:
- With the window in the cleaning position, locate the air filter along the top edge.
- Gently remove the filter from the filter rail.
- Wash the filter using ordinary household cleaners and rinse thoroughly.
- Allow the filter to fully dry before reinserting it.
- If the filter is worn out, replace it with a new one (available from VELUX maintenance kits).
💡 Tip: Cleaning the air filter every 6-12 months ensures optimal air circulation and prevents dust buildup.
Cleaning the Flashing and Preventing Drainage Issues
The flashing around your VELUX window is designed to direct water away and prevent leaks. Over time, leaves and debris can accumulate, leading to drainage problems.
How to Clean VELUX Flashing:
- Remove leaves, twigs, and debris at least once a year.
- Check for clogged gutters that could cause water to pool around the window.
- If you notice any damage or signs of wear, replace flashing components promptly.
💡 Tip: Regular flashing maintenance helps prevent leaks and extends the lifespan of your VELUX window.
How to Prevent and Manage Condensation on VELUX Windows
Condensation is a common issue in homes, particularly on roof windows where warm, moist air rises. It often occurs during colder months when indoor air meets the cooler glass surface.
Understanding Condensation
- Condensation is not a leak—it is caused by excess humidity inside the home.
- Common signs include fogging, water droplets on glass, and damp window frames.
How to Reduce Condensation:
- Ventilate regularly – Open windows for five minutes, three to four times daily.
- Use extractor fans in kitchens and bathrooms to expel excess moisture.
- Maintain a consistent indoor temperature (around 20°C) to reduce temperature fluctuations.
- Avoid drying laundry indoors without proper ventilation.
- Use a dehumidifier in winter to remove excess moisture from the air.
💡 Tip: If condensation forms on more than just the glass, check if roofing underlay and insulation were properly installed around the window frame.
How to Protect Your VELUX Windows in Extreme Weather
Roof windows are exposed to heavy rain, snow, and strong winds, making protection a priority.
Snow and Ice Protection
- Keep ventilation flaps closed during heavy snowfall to prevent ice buildup on the window frame.
- Clear excessive snow accumulation to avoid water leaks when melting begins.
Rain and Storm Protection
- Inspect flashing and seals before storm season to ensure proper drainage.
- If leaks appear, check for damaged flashing or blocked drainage channels rather than assuming the window is faulty.
💡 Tip: Proper installation and routine maintenance reduce the risk of weather-related damage.
Removing Mould and Mildew from VELUX Windows
Condensation can lead to mould growth around window frames if left unchecked. Mould not only damages window frames but also affects indoor air quality.
How to Remove Mould from Wooden Window Frames:
- Scrape off any surface mould using a soft brush.
- Clean the area with a solution of one part household bleach to ten parts water.
- Rinse well with clean water and allow the frame to fully dry.
- Lightly sand the surface if necessary.
- Apply a clear wood preservative to protect against future mould growth.
💡 Tip: If mould keeps returning, check for persistent condensation issues or ventilation problems.
Long-Term Maintenance Tips for VELUX Windows
To keep your VELUX windows in top condition, follow these simple maintenance steps:
✔ Recoat wooden frames periodically to protect against moisture damage.
✔ Use soft water to prevent mineral deposits on the glass.
✔ Check flashing and drainage yearly to prevent leaks.
✔ Trim surrounding trees to prevent excessive debris buildup.
✔ Replace damaged seals and weatherstripping as needed to maintain insulation.
Conclusion: Keeping Your VELUX Windows Clean and Functional
Regular cleaning and maintenance keep your VELUX windows looking great and functioning optimally. By cleaning the panes, air filter, and flashing, as well as managing condensation and protecting against extreme weather, you can extend the lifespan of your roof windows.
A simple, routine cleaning schedule can help prevent costly repairs and ensure that your home remains bright, airy, and energy-efficient.
💬 Got any questions about maintaining your VELUX windows? Leave a comment below!