Welcome to our website. Please read about what we do and don’t be afraid to get in touch if you’d like to book.
@ quote@intuitive-platinum-hare.185-199-220-72.cpanel.site
Welcome to our website. Please read about what we do and don’t be afraid to get in touch if you’d like to book.
@ quote@intuitive-platinum-hare.185-199-220-72.cpanel.site
Structural Glazing & Rooflight Specialists
Most of our lantern work is the Sheerline S1 in aluminium. The frames are slim, so you get more glass and more daylight, and the thermal break keeps the warmth in. They suit nearly every kitchen extension we see across London.
For a flatter, more modern look we fit fixed or walk-on flat glass rooflights. From inside you see glass and almost no frame — ideal over a side return or a clean, contemporary extension.
Conservation Area Expertise: If you're in a conservation area, we use low-profile heritage rooflights that sit flush with the tiles. They bring the light in without changing the look of the roof, which keeps the council happy.
Every rooflight installation includes:
The Sheerline S1 has a proper thermal break running through it and double or triple glazing on top, so the heat stays in over winter and the solar-control coating stops the room cooking in July. We've fitted plenty that the owners now use as their main living space all year round.
The slim rafter profile means more glass area and more natural light flooding into your extension — a dramatic difference compared to older, bulkier aluminium systems.
A multi-chambered frame with thermal break running right through it achieves a U-value of around 1.0 W/m²K — comfortably better than Building Regs ask for. Less heat escaping, smaller heating bills.
Self-cleaning solar glass reduces glare and heat build-up in summer while maximising useful daylight year-round. Keeps the room comfortable without blinds or shutters.
The white powder-coated frame is clean and unfussy, working whether your extension is modern or traditional. Available in anthracite grey, white, or custom RAL colours.
We fit the full range of structural glazing solutions — from walk-on flat glass over basements to flush-fitting conservation rooflights for period properties and Listed Buildings.
We take our time on the actual fit — getting the upstand square, bedding the unit down properly and sealing it so there are no leaks or cold spots a couple of winters down the line.
Give us a call or drop your details in the form and we'll come out, measure up, and tell you honestly what will work for your roof — no hard sell.
Fitting rooflights and roof lanterns across all London boroughs — from kitchen extensions in Islington to side returns in Hackney and loft conversions in Hampstead.
If you are looking for expert rooflight installers in London, look no further than Golden Ratio. Call today on 02034881695 or 07507391329 for a free site survey and no-obligation quote.
We are approved installers of the Sheerline S1 aluminium roof lantern system — one of the warmest and most thermally efficient lanterns on the market. Slimline 50mm rafters, self-cleaning solar glass, marine-grade powder coating, and U-values down to 1.0 W/m²K as standard.
Usually not. A rooflight normally falls under Permitted Development as long as it doesn't project more than 150mm above the roofline. Conservation areas and Listed Buildings are the exception — we'll spec a heritage rooflight and help you get it approved.
The S1 gets down to a U-value of around 1.0 W/m²K thanks to its multi-chambered thermal break — comfortably better than Building Regs require. In plain terms: less heat escaping and smaller heating bills.
No — not with a modern frame. The Sheerline S1 has a proper thermal break and double or triple glazing, so the heat stays in over winter. The solar-control coating also stops the room overheating in July.
Yes. We use low-profile heritage rooflights that sit flush with the tiles and satisfy conservation officers. We handle the paperwork and liaising with planning so it gets signed off without a fight.
Cost depends on the size, specification (flat glass vs lantern vs conservation), and any structural work required. We provide a fixed, accurate quote after a free site survey — no estimates over the phone.
City of London Kentish TownA selection of our recent rooflight and roof lantern installations across London. Every unit properly fitted, sealed, and certified.
Here at Golden Ratio Windows we have built an excellent reputation fitting rooflights and roof lanterns across London. From the initial site survey to the final FENSA sign-off, we are with you every step of the way.
SEE OUR SERVICESWith many years in the trade, we are happy to answer any queries and provide quotes. Call us on 02034881695 or send a message through our contact page.
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