A roof lantern is one of the most dramatic ways to change how a room feels. Sitting on top of a flat roof or in the centre of an orangery, they flood the space below with natural light in a way that no window or door can quite replicate. The difference on a bright day is genuinely striking. We’ve been fitting roof lanterns across Surrey since 1972 and currently offer the Korniche, a roof lantern range we’ve chosen because we think it’s one of the best on the market at any price point.
The Korniche is a British-made roof lantern built around die-cast aluminium components, giving it exceptional strength without the need for bulky rafters. The result is a lantern with slim, elegant sightlines that lets in as much light as possible and looks beautiful from both inside and out.
“Sheerwater Glass were so friendly, polite and efficient. Everyone involved in the installation were lovely.”
Our roof lanterns use a polyamide thermal break system inside the frame to significantly reduce heat transfer. Combined with high-quality double or triple glazing, they can achieve excellent thermal performance, keeping your home warmer in winter and cooler in summer.
Most of our glass options are self-cleaning, which means organic material on the surface is broken down by daylight and washed away by the rain. For a roof you can’t easily reach, that’s a genuinely useful thing to have.
The aluminium profiles are deep but beautifully slender, with subtle ogee detailing on the lower edges and fully concealed fixings throughout. A Korniche roof lantern looks as good from the garden as it does from inside the room below.
Every roof lantern we fit is secured with a glass lock system and tamper-proof fasteners, with all fixings concealed behind finishing caps so there’s nothing visible from outside. Best-in-class weather seals and gaskets keep draughts and rain firmly out, so you can enjoy the light without worrying about what’s coming through the roof.
We also offer a range of tinted glass options — Blue, Aqua, Bronze and Neutral among them — which reduce solar heat gain and light transmission on south-facing roofs. So if your extension gets a lot of sun, we can make sure it stays comfortable rather than becoming a greenhouse in summer.
You’ll speak to a real person, not a call centre. We’ll talk you through options, no pressure.
Sheerwater Glass proudly provides window and door installations, repairs, and glazing services throughout Surrey and the surrounding areas from our showrooms in Guildford and Woking.
To find out whether we cover your area, simply click the button below and check your postcode.
Our roof lanterns use a thermally broken eaves beam, insulating T-bar and high-performance glazing to achieve U-values as low as 1.2 W/m²K. That’s genuinely impressive for a roof structure, and it means your home stays comfortable year round without your heating having to work harder to compensate.
Very. A 6m x 4m Korniche roof lantern can support over 8 tonnes of weight, so heavy snow and strong winds aren’t something you need to worry about. Premium components, weather seals and gaskets keep everything watertight and draught-free in even the worst conditions.
Standard colours are Gloss White, Matt Grey and Matt Black, and all three are available as internal and external combinations. If you need something specific, any RAL or BS colour can be supplied. Sizes vary depending on your roof opening and we’ll advise on what works best when we visit.
Not really. Most of our glass options are self-cleaning, which means daylight breaks down organic material on the surface and the rain washes it away. For glass that’s not easy to reach, it makes a real practical difference.
Much less than you might expect. The Korniche sections are just 57mm wide, making them among the slimmest on the market. Fewer rafters than competing systems and a larger glass area mean more sky, more light and a much less cluttered view from inside.
