Menu
London's trusted window installation service — call us for a free site survey.
Get a quote
Brighten your London home with high-performance aluminum roof lanterns and flat glass skylights. Sheerline S1 approved installers.
No obligation · Free site survey · Reply within hours
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.
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.
It's the first thing people ask us, and the honest answer is no — not with a modern frame. 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.
Do you need planning permission?
In most cases, no. Rooflights usually count as Permitted Development as long as they don't sit more than 150mm above the existing roof slope. The exception is conservation areas and listed buildings — there we'll spec a heritage rooflight and help you with the paperwork so it gets signed off without a fight.
What about the U-value?
The S1 uses a multi-chambered frame with a thermal break running right through it. That gets you a U-value down around 1.0 W/m²K, comfortably better than Building Regs ask for. In plain terms: less heat escaping, and smaller heating bills.
The white powder-coated frame is clean and unfussy, so it works whether your extension is modern or more traditional. 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.
We don't only do lanterns, either. If you need windows or doors supplied and fitted anywhere in London, we can usually sort that on the same job rather than you chasing two trades.
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.
Watch our expert structural glazing team fit high-performance Sheerline S1 systems.
Technical Fit-Out
Structural framing and alignment of an aluminum roof lantern.
Final Glazing Process
Professional weather-sealing and final glazing touches.
Ready to elevate your home with natural light? Book a technical design consultation with London's leading heritage joinery specialists.
Usually not. A rooflight normally falls under Permitted Development as long as it doesn't project more than 150mm above the roofline. If you're in a conservation area or a listed building, we'll fit a heritage-style rooflight and help you get it approved.
It's one of the warmest lanterns on the market. The S1 gets down to a U-value of around 1.0 W/m²K thanks to its multi-chambered thermal break, so the room stays comfortable in winter without pushing your heating bills up.
If you're thinking about a structural glazing project or need advice on rooflight options, get in touch. We're happy to discuss your ideas and provide a free quote.
218 Hornsey Road, London, N7 7LL
Fill in the form and we'll get back to you within one business day — usually much sooner.
