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Korniche Flat Glass
Premium Flat Rooflight
13 stock sizes or made to measure,
PAS 24 secure with a 10-year warranty.
Why Choose Korniche Flat Glass?
Korniche Flat Glass is a fixed flat glass rooflight for flat roofs, made for extensions, kitchens and garden rooms where you want as much daylight as possible and a clean finish inside and out. It is tested to PAS 24:2020 for security and comes with a 10-year manufacturer’s warranty.
Each unit is made to order by Korniche and supplied ready to fit onto a timber or builder’s upstand, with the internal trim included. We list 13 popular sizes, each in three frame colours with double or triple glazing. Need a different size? We can supply Flat Glass made to measure, right up to the maximum size of the system.
Key Features
✔ PAS 24:2020 security tested
✔ Double glazed (Ug 1.2) or triple glazed (Ug 0.6)
✔ Argon filled with warm-edge spacer bar
✔ Easy-clean coating on the outer pane
✔ Polymer inner frame to cut heat loss
✔ Replaceable glazing unit, internal trim supplied
✔ Anthracite Grey, Black or White frame
✔ 10-year manufacturer’s warranty
Korniche Flat Glass at a glance
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✓ Up to 75% light transmission
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✓ Ug as low as 0.6 with triple glazing
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✓ PAS 24 secure, 10-year warranty
Available Flat Glass Sizes & Prices
Browse the full range of Korniche Flat Glass rooflights below.
Every size comes in Anthracite Grey, Black or White, double or triple glazed, ready to fit onto a correctly built upstand.
Choose your size to see the price for your colour and glazing.
Need a bespoke size?
Can’t see your size? We supply Korniche Flat Glass made to measure, right up to the maximum size of the system. Ring us on 01922 254100 or email us with your upstand sizes for a price.
Glazing Options Explained
Korniche Flat Glass comes in two clear glazing specifications. Both are argon filled, with a warm-edge spacer and an easy-clean outer coating.
Double Glazed
Ug 1.2 W/m²K with 75% light transmission. A good all-round choice for kitchens, extensions and garden rooms.
Triple Glazed
Ug 0.6 W/m²K with 70% light transmission. Half the heat loss through the glass of double glazing – the better choice for bedrooms, bathrooms and rooms you want to keep warm.
Frame Colours
Anthracite Grey Matt (RAL 7016)
Black Matt (RAL 9005)
White Gloss (RAL 9910)
Security
Tested to PAS 24:2020, the same security standard used for doors and windows.
Performance & Specification – At a Glance
You don’t need to be a glazing expert to understand what makes Korniche Flat Glass perform.
Excellent thermal performance
High-performance double or triple glazing helps reduce heat loss while allowing natural light into flat roof spaces.
Outstanding weather resistance
Precision-engineered seals and aluminium construction provide long-term protection against wind and rain when correctly installed on a suitable upstand.
Durable powder-coated aluminium finishes
The aluminium frame is professionally powder coated for a smooth, long-lasting finish that resists fading, corrosion and everyday wear.
10-year manufacturer’s warranty
Peace of mind comes as standard, with a Korniche manufacturer’s warranty covering materials and manufacturing quality.
Frequently Asked Questions – Korniche Flat Glass Rooflights
What is Korniche Flat Glass?
A fixed flat glass rooflight from Korniche for flat roofs. It is tested to PAS 24:2020, double or triple glazed, argon filled with a warm-edge spacer and an easy-clean outer coating, and comes in Anthracite Grey, Black or White.
How is it different from the Korniche FlatLite?
Both are fixed flat rooflights made by Korniche, and both are PAS 24 security tested. FlatLite is Korniche’s most cost-effective rooflight, made in set sizes. Flat Glass is the premium option, with a polymer inner frame to cut heat loss, an easy-clean coating, a replaceable glazing unit, the internal trim supplied and sizes up to 3m x 1.7m. If budget comes first, see our Korniche FlatLite range.
Is the upstand included?
No. Flat Glass fits onto a timber or builder’s upstand built on site. Korniche ask for an upstand wall 75–85mm thick, at least 150mm high, with a 3–5° fall and the two diagonal measurements within 4mm of each other.
How do I measure up?
Follow the Flat Glass surveying guide (PDF) before you order. If you are not sure, ring us on 01922 254100 and we will talk you through it.
Should I choose double or triple glazing?
Double glazing (Ug 1.2) suits most kitchens, extensions and garden rooms. Triple glazing (Ug 0.6) halves the heat loss through the glass and is worth it over bedrooms, bathrooms or anywhere you want to keep warm.
Can I get a size that is not listed?
Yes. Korniche make Flat Glass up to 3m x 1.7m (3m² maximum). Ring us on 01922 254100 or email for a price.
Can the glass be replaced?
Yes. The glazing unit is replaceable. The Flat Glass glass replacement guide (PDF) shows how it comes out.
What warranty is supplied?
Korniche Flat Glass comes with a 10-year manufacturer’s warranty.
Do you offer installation?
We don’t carry out installation directly. However, we may be able to help connect you with experienced fitters, depending on your location. Installation should always follow the Korniche installation guidelines.
How long does delivery take?
Each unit is made to order, so lead times vary with size and specification. Ring us before ordering if you need a firm date.
Downloads
Korniche Flat Glass brochure (PDF)