Colin fitted 4 windows in my first floor flat with his assistant/colleague Jay. The work was completed over 3 days. It is an absolutely amazing result, the windows are beautifully fitted and look fabulous. I had 3 sash windows: one 3-window bay (living room), one in the kitchen, one on the bedroom. The bathroom window had a beautiful mayflower pattern. The difference in appearance, warmth and blocking of outside noise is remarkable. The guys were really hard-working, respectful and considerate and always hoovered and cleared up well. On the last day I felt totally at ease leaving them in my flat to finish (unusual for me) and came home to a wonderful transformation. If you need new windows, the expertise of Sanderstead Windows will change your life! Thank you so much. Roxana
20 Years Experience
Family Owned
Sustainable
Customer Recommended
No Pushy Sales
NATURAL LIGHT SPECIALISTSWhy Choose Our Flat Roof Lights?
We specialise in durable premium flat roof lights that transform dark spaces into bright, welcoming areas. Our aluminium-framed rooflights feature double or triple glazing with outstanding U-values, ensuring excellent energy efficiency. With over 20 years of glazing experience, we provide expert installation across South London, backed by comprehensive warranties and building regulations compliance.
Flood Your Home with Natural Light
Our flat glass rooflights provide an uninterrupted view of the sky while dramatically increasing natural daylight in any room. The sleek, minimalist design sits flush with your roofline, creating a clean and contemporary appearance.
Perfect for kitchens, living areas, and extensions, these roof windows reduce your reliance on artificial lighting during daylight hours, helping to lower energy consumption and create a more inviting, natural living space.
- Colours
- Glazing & Performance
Frame Colour Options
Our flat roof windows feature powder-coated aluminium frames in contemporary Anthracite Grey (RAL 7016) as standard. Additional RAL colours are available on request to perfectly complement your home's aesthetic.
Anthracite Grey
Black
White
Superior Thermal Performance
- Toughened safety glass as standard
- Argon gas filling for enhanced insulation
- Thermal Super Spacer technology
- Clear, solar, or privacy glass options
- Thermally broken aluminium frames to minimise heat loss
Outstanding Energy Efficiency Performance
According to the Energy Saving Trust, improving glazing can reduce household energy bills by up to 10%. Our thermally broken aluminium frames create an insulated barrier that minimises heat transfer and reduces condensation.
The advanced glazing technology, combined with Argon gas filling, delivers exceptional thermal performance. This means less heat loss in winter and better temperature control year-round, making your home more comfortable while reducing heating costs.
Frequently Asked Questions About Flat Roof Lights
Common questions about our flat roof lights installation, performance, and building regulations compliance answered by our glazing experts.
Contact UsMost flat roof lights fall under permitted development rights, though building regulations approval is typically required for structural and thermal compliance.
Rooflights are installed flush with flat roofs, while skylights are designed for pitched roofs and sit at the same angle as the roof surface.
Our premium flat roof lights are built for durability and longevity, backed by our 10-year frame guarantee and comprehensive insurance-backed warranty.
Yes, we offer both fixed and opening flat roof lights, with opening versions providing additional ventilation ideal for kitchens and bathrooms.
Our double glazed units achieve 1.2 W/m² U-value, while triple glazed options deliver an impressive 0.7 W/m² for superior energy efficiency.
Customer Reviews
Roxana Asad
Colin fitted 4 windows in my first floor flat with his assistant/colleague Jay. The work was completed over 3 days. It is an absolutely amazing result, the windows are beautifully...
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Lucy Gray
Colin and John from Sanderstead Windows recently fitted new windows across my whole 2 bed house, a beautiful new front door, and stunning bifold doors across the back. They completely...
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Emma Ball
Amazing experience from start to finish. Colin was incredibly quick to reply, and quoted a very reasonable price. On installation day, it was 30 degrees, but Colin and the other...
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Nadia Charrion
Colin is one of a kind with such a fantastic work ethic! I couldn’t be more pleased with the results of my windows, he went above and beyond to ensure...
Read more
Roxana Asad
Lucy Gray
Colin and John from Sanderstead Windows recently fitted new windows across my whole 2 bed house, a beautiful new front door, and stunning bifold doors across the back. They completely transformed my property front and back in only 4 days, working through one of the recent mini-heat waves.
I can’t fault their workmanship; professional, friendly, unbelievably clean and tidy at the end of each day. I felt more than comfortable leaving them alone in my house every day whilst I was out, and even locked up after themselves when I was home late.
Payment procedure clear and efficient.
Great work, great guys. Would highly recommend (and already have) to anyone needing new windows/doors.
Thanks guys. 👍🏻
Emma Ball
Amazing experience from start to finish. Colin was incredibly quick to reply, and quoted a very reasonable price.
On installation day, it was 30 degrees, but Colin and the other window fitter worked tirelessly. They even made good of some pebbledash that needed to be chipped off. I’m so happy with the result, and love my new windows.
An all-round pleasure to work with – massively recommend!
Nadia Charrion
Colin is one of a kind with such a fantastic work ethic! I couldn’t be more pleased with the results of my windows, he went above and beyond to ensure everything was perfect and that I was very happy with the work.
From the initial contact to the completion of the job, the entire process was smooth and professional. The windows are absolutely amazing and my expectations were exceeded and I honestly couldn’t recommend him enough.
Outstanding quality work, very satisfied and happy with his service provided.
The standard of work was amazing, he is conscientious worker.
Highly recommend and already passed on Colin’s details to family and friends.
