How to Maintain Frameless Fixed Rooflights (With Cleaning Tips)
Frameless fixed rooflights are popular for their clean lines, minimal visual impact, and outstanding daylight performance. But like any architectural glazing, they require proper maintenance to stay pristine and functional over the years.
This guide offers expert-backed advice on maintaining frameless rooflights, cleaning them safely, and preventing common issues such as staining, seal deterioration, and condensation. If you’ve recently installed a unit from Skylights.co.uk, or you’re considering one, this article will help you protect your investment.
Table of Contents
Why Maintenance Matters for Frameless Rooflights
While frameless rooflights are designed for low maintenance, routine care improves longevity, clarity, and performance.
Benefits of regular maintenance:
Keeps the glass clear and streak-free
Prevents algae, moss, and debris buildup
Ensures drainage channels and seals remain effective
Detects minor issues (like seal failure) before they become significant problems
“Frameless designs look beautiful, but because there’s no overhanging frame, dirt builds up faster around the edges. Seasonal cleaning is essential.”
— Emily Garner, Rooflight Specialist, RIBA Affiliate
Cleaning Frameless Rooflights: Step-by-Step Guide
✅ Equipment You’ll Need
Soft-bristled telescopic brush
Mild soapy water (use pH-neutral detergent)
Squeegee with a rubber blade
Microfibre cloths
Access platform or scaffold (if required)
✅ Cleaning Steps
Check the forecast: Choose a dry, overcast day to avoid streaking.
Rinse the surface with clean water to remove loose debris.
Apply soapy water using a soft brush, working from top to bottom.
Use the squeegee to remove excess water.
Buff dry any remaining spots with a microfibre cloth.
Important: Never use abrasive sponges, harsh chemicals, or pressure washers — these can damage coatings or seals.
Best Practices for Long-Term Rooflight Care
✅ 1. Clean every 3–6 months
- Especially important in autumn (leaf fall) and spring (pollen/dust)
✅ 2. Inspect the surrounding roof surface
Ensure the surrounding membrane or lead flashing is intact
Check that the drainage outlets are free from blockages
✅ 3. Check for condensation buildup
Especially on the inside of rooflights in kitchens or bathrooms
Use dehumidifiers or improve ventilation if needed
✅ 4. Maintain glazing seals
Look for signs of sealant cracking, discolouration, or detachment
Re-seal with neutral cure silicone if necessary (consult a professional)
“Our frameless units are built with weather-resistant silicone seals, but like any exterior detail, they should be checked at least once a year.”
— John Featherstone, Technical Manager
Frameless vs Framed Rooflight Maintenance: Comparison Table
| Feature | Frameless Rooflights | Traditional Framed Rooflights |
|---|---|---|
| Cleaning frequency | Moderate (every 3–6 months) | Slightly less due to frame overhang |
| Seal exposure | High (exterior seals visible) | Low (protected by frame) |
| Drainage paths | Around the outer edge of the glass | Typically built into the frame |
| Best for | Flat roofs, minimal design | Pitched roofs, traditional homes |
Real Use Case Examples
🏡 Harmony Builders – Modern Extension in Sheffield
“We installed two frameless rooflights from Skylights.co.uk in a zinc roof. The client uses a soft brush and self-cleaning glass. After two years, they still look showroom-clear.”
🏡 Elise in Oxford – Kitchen Rooflight Maintenance
“My flat roof skylight had moss buildup after one winter. A half-day clean with a soft pole and soapy water made it look new again. I now clean it every six months.”
🏡 Ajay’s Garden Studio in Leicester
“Our frameless model gets a light rinse in spring and autumn. We also clear the drain spouts — very easy to manage.”
Calculate Your Skylight Size By Room
FAQs: Rooflight Cleaning & Maintenance
Every 3–6 months, depending on location. Urban areas with air pollution or leafy areas may need more frequent cleaning.
No. Even walk-on models have strict loading limits. Always use ladders or roof access systems, or hire professionals.
That indicates seal failure or a blown unit. Contact your supplier immediately — especially if the issue is within the warranty period.
No, but it reduces the frequency and effort of cleaning. Rain helps wash away dust and organic matter.
Final Takeaways
✅ Frameless rooflights need cleaning every 3–6 months for optimal clarity and durability
✅ Use soft tools, pH-neutral cleaners, and never apply pressure washers
✅ Inspect seals and drainage once per year
✅ Frameless models combine durability with elegant minimalism
Need a professional maintenance guide or glass-safe cleaning kit? Contact us.