Flat Rooflights
Overview
A flat rooflight is a sleek, low-profile pane of glass set into a flat roof, bringing daylight deep into kitchens, extensions and landings where windows can't reach. Where a roof lantern makes a bold feature, a flat rooflight almost disappears from outside and gives a clean, minimal look from inside.
We install Korniche flat rooflights, made in the UK. The glass sits on an upstand built at a slight pitch of 3 to 5 degrees, so rainwater runs off rather than pooling on the pane. Choose double or triple glazing, self-cleaning glass to help keep the roof clear, and solar-control or laminated glass where you need them.
Every project starts with a free design visit to look at your roof and the room below. We can work alongside your builder on a new extension, measuring the upstand once it is built so the rooflight fits exactly, and our own team installs it. Every installation comes with our 10-year insurance-backed guarantee. We supply and fit flat rooflights across London, Hertfordshire, Kent and Surrey, or book a free design consultation.
Korniche flat rooflights we install
Korniche Flat Glass Rooflight: sizes up to 3m by 1.7m (maximum 3m² of glass), 28mm double or 44mm triple glazing, and PAS 24:2020 security.
Korniche FlatLite: a simpler rooflight from 400 x 700mm up to 1000 x 2000mm, with double or triple glazing, an optional laminated inner pane, triple weather seals and PAS 24:2022 as standard.
Self-cleaning glass in Clear, Neutral, Blue or Premium Blue, with laminated and solar-control options.
Frames in anthracite grey (RAL 7016), black (RAL 9005) or white (RAL 9910), or bespoke RAL and BS colours.
Flat rooflights: frequently asked questions
Flat rooflight or roof lantern?
A flat rooflight is minimal and sits low on the roof; a roof lantern adds height and makes a feature of the ceiling. We'll recommend the best option for your roof and room.
How big can a flat rooflight be?
Korniche's Flat Glass Rooflight goes up to 3m by 1.7m, with a maximum glass area of 3m². For bigger openings we can use more than one rooflight or a lantern.
Why does the upstand need a slight pitch?
A fall of 3 to 5 degrees lets rainwater run off the glass instead of sitting on it, which keeps the pane cleaner and protects the seals.
Which glass should I choose?
Self-cleaning glass helps keep the roof clear, solar-control glass reduces heat build-up on sunny roofs, and triple glazing improves thermal performance. Laminated glass adds safety and security.
Can I walk on a flat rooflight?
The Korniche rooflights we fit are designed as rooflights rather than walk-on glass. If you need a walk-on panel, let us know at your design visit.
Do rooflights need to meet Building Regulations?
Yes. In England a new or replacement rooflight should achieve a U-value of 2.2 W/m²K or better. A rooflight in a new extension is covered by the extension's Building Regulations approval.
Explore the full range: see all our rooflights and roof lanterns.
You may also like: roof lanterns, bi-fold doors and gable windows.
Get a free quote: call 020 4581 8351, email sales@aliluxe.co.uk or request a quote online. More answers on our FAQ page.
Features
1. Low-Profile Design
Sits almost flush for a clean, minimal look.
2. Pitched Upstand
A 3–5 degree fall lets rainwater run off.
3. Double or Triple Glazing
28mm double or 44mm triple glazed units.
4. Self-Cleaning Glass
Clear, Neutral, Blue or Premium Blue.
5. PAS 24 Security
Tested to the UK security standard.
6. Colour Choice
Grey, black or white as standard, or bespoke RAL and BS colours.
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Specifications
1. Daylight From Above
Light reaches the middle of deep rooms.
2. Minimal Look
Barely visible from outside, clean from inside.
3. Brighter Extensions
Ideal over kitchens, dining areas and landings.
4. Cleaner Glass
Self-cleaning options help keep the view clear.
5. Comfort
Solar-control glass helps with sunny roofs.
6. Made in the UK
Korniche rooflights, fitted by our own team.
