Korniche Roof Lantern In White (Ral 9010G) - (1000mm x 1000mm)

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Described as ‘the fastest lantern to install on the market’, the Korniche Roof Lantern In White (Ral 9010G) - (1000mm x 1000mm) is a real fitter-favourite!
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Korniche Roof Lantern In White (Ral 9010G) is the perfect way to brighten up your home and add a touch of modern elegance. Crafted from high-quality materials and finished in a sleek black, this roof lantern floods your home with natural light, creating a warm and inviting atmosphere that is perfect for both relaxing and entertaining

It features expertly designed glazing bars that allow for a minimalistic look and maximum light penetration, giving your home a bright and open feel. Thanks to its innovative design, this roof lantern is incredibly easy to install, making it a hassle-free addition to any home, often described as “the fastest lantern to install on the market”.

Transform your space today!

Product Roof Lantern
Glass Double Glazed - Clear Self Clean
Ext. Colour White (Ral 9010G)
Int. Colour White (Ral 9010G)
Size 1000mm x 1000mm (Stock size)
Length 1000mm
Width 1000mm
Pitch 25 (assumed pitch, please contact us to change this)
Max Height Restriction If a specific maximum is required please contact us

Material & Options:

Brand/Model: Korniche Roof Lantern
Material: Aluminium
Delivery Time: 3-4 Weeks*
Glazing: 24mm Double Glazed
Vent Options: Manual with Pole/Electric (Switch Operated)
Standard Colours: Anthracite Grey (RAL 7016 Matt), Black (RAL 9005 Matt), White (RAL 9010 Gloss), Bespoke RAL Colours (Quote RAL colours here!)

*Delivery time is a typical example and is dependent on postcode and current workload.


Max-Sizes: 4000mm (W) x 6000mm (L).
Largest Rectangular Lantern with only 4 Glass Units: 3000mm (W) x 2500mm (L) (External Size).
Largest Overall Rectangular Lantern Size: 6000mm (W) x 4000mm (L) (External Size).
Largest Pyramid Lantern with only 4 Glass Units: 2500mm (W) x 2500mm (L) (External Size).
Largest Overall Pyramid Lantern Size: 4000mm (W) x 4000mm (L) (External Size).


U Value: from 1.0/1.2 W/m²K (Depending on glass, see table below)
Ambience Glass
Blue Aqua Ultra Sunshade Blue Bronze Neutral
U Value 1.2 W/m²K 1.0 W/m²K 1.0 W/m²K 1.0 W/m²K 1.2 W/m²K 1.2 W/m²K
Solar Heat Reflection 60% 82% 91% 80% 55% 60%
Light Transmission 47% 30% 8% 34% 38% 37%
Self Cleaning Yes Yes No Yes Yes Yes
2022 Document L compliant

Measuring Guide for Korniche Aluminium Roof Lanterns

Atlas Measuring Guide 1

The essential measurement is the external kerb, as shown in the above diagram. Looking at the base (or kerb) that the lantern is going to be fitted to, this outside measurement is the one that we need on both length and width.

image of construction of atlas roof lantern

The kerb is typically built out of timber, and the ideal width is 80mm. Please note the absolute minimum kerb width is 67mm.

Ventilation is not usually required with roof products, as this is taken care of mainly through windows, doors and air bricks. If ventilation in the roof is required (or is your preference), then a lantern is the best option as we have a choice of manual and remote-operated roof vents. Roof lights are always fixed and cannot be opened.

Our roof products are designed to be easy to fit for people with DIY experience and experienced tradesmen. Roof lights come pre-glazed for easy installation and roof lanterns come with illustrated instructions and clearly labelled, pre-cut parts. However, it is always wise to have the products fitted by somebody with experience present.

Please also remember that the product can require several people to lift the heavy glass units, and working at a height always requires appropriate health and safety measures are observed.

Yes, we can offer marine-grade upgrades for customers who live within 10 miles of the coast.

The best energy rating we can is a roof lantern with 44mm triple glazing, which can achieve a U value as low as 0.6.

The glass itself should be cleaned in the normal way, with a soft sponge and warm water with mild detergent. As some roof products may have restricted access we offer self-cleaning glass as standard, which has a coating on to help remove dirt particles when rainwater hits it.

Planning permission is not typically required to install a roof lantern or roof light. Both products are usually considered as permitted development providing they meet the following criteria:

The roof lantern/light must not protrude any higher than 150mm from the existing roof plane.

The roof lantern/light must not be any higher than the highest part of the house roof.

Any side facing windows must be obscure glazed and any openings must be 1.7m above the floor.

The above restrictions are for alterations to houses, and there are slightly different guidelines for flats, maisonettes, and converted houses. As ever, advice on planning permission is always subject to change, so always check with your local council or building authority, and exercise particular caution if you live in a conservation area or listed building.

For new builds and extensions, the products will need building regulations consent and must meet the current recommended minimum requirements. Further accreditations such as document Q, PAS24 and Police Approved may not be essential, but check that your architect or authority have not specified this.

Lean to roofs are not part of our standard range, but we can supply them by special request. Please refer to our Atlas brochure for information on lean-to roofs. If you are interested in a quote, please send to our sales team.

Below are the different glass options explained, along with when they might be suitable. We default to A rated glass standard.

Celsius Elite - High-performance glass with a blue tint and easy clean coating. The most energy-efficient glass on the market today, and the highest performing.

Self Cleaning Clear - Clear glass with a self cleaning coating.

Self Cleaning Blue - Blue tinted glass with a self-cleaning coating.

Self Cleaning Neutral - A neutral tinted glass with a self-cleaning coating.

Self Cleaning Blue 44mm triple glazed - As above but 44mm triple glazed (better energy rating than double glazed).

Self Cleaning Neutral 44mm triple glazed - As above but 44mm triple glazed (better energy rating than double glazed).

We only use industry-leading brands for our products, which is especially important when considering roof lanterns or roof lights as they can vary greatly in quality. We proudly display every brand we supply, and any research into these brands will confirm they are of impeccable quality.

It is important to choose a reputable roof product, as once installed it can be problematic to carry out remedial work. Our roof products are not only considered the strongest on the market, but they are renowned for their ease of installation (all parts are cut and clearly labelled with illustrated installation instructions).

A contemporary roof lantern will not have any roof bars between the four sections, so you are left with four panes of glass. This is great for maximum glass area, but it does mean these roofs have a size restriction of 1500mm in width and 3 metres in length.

A regular roof lantern is more of a traditional look, and will have roof bars in each of the four sections. The number of roof bars depends on the overall size, which is why we always provide a detailed CAD drawing once your order is placed. For this reason, regular roof lanterns can be made in bigger sizes of up to 4 metres in width and 3 metres in length.

Maximum sizes are up to 1400mm in width and 6 metres in length.

Maximum sizes are up to 4 metres in width and 3 metres in length for regular roof lanterns.

Maximum sizes are up to 1500mm in width and 3 metres in length for contemporary roof lanterns.

This size best suits our lantern profile, which has an internal groove just the right size for your plasterboard to be fitted and run flush, leaving a clean and professional internal finish.

A tie bar is an internal T-shaped bar that may be required when a roof exceeds a certain size. You may have seen these before on large conservatory roofs, and they essentially tie the rafters together and further support the roof structure, preventing excess load or collapse.

Our software can calculate when tie bars are required, here are the general rules for our roof lanterns based on size:

Up to 2.5 metres wide - no tie bars required

Up to 3.8 metres - hidden tie bar

Up to 5 metres (depending on design) - rafter tie bar

Any order for a roof lantern will receive a technical CAD drawing for your sign off and approval. This is not usually required on a roof light.

Roof lanterns come as standard with a 25-degree pitch, and roof lights are recommended to be fit on a 5-degree pitch. We can alter this depending on your requirements but recommend these pitches.

Yes, we can offer roof vents that are either manual opening with a pole or electronic with a remote control or wall-mounted switch.

Firstly, both options will give you an abundance of natural light! Here are some key points and considerations which should help you decide which is the best fit for you:

Rooflights are well suited to projects that dont want to add any extra height to a building.

Lanterns are seen as more of a feature and will likely be the central focus of the room. Roof lights offer a more subtle, understated look but still offer lots of natural light.

Rooflights are cheaper than lanterns, but often you will require more than one so the cost does even out. For example, on a standard 6m x 3m rear extension you would choose between either a central roof lantern or 2/3 roof lights, depending on your design preference.

Both products are fairly easy to install, roof lights in particular as they arrive pre-glazed for easy installation. Roof lanterns will come with the glass units separate to fit on site.

Consider the look of the products from the upper floor of the house. Do some of the bedroom windows face directly onto the roof? If so decide which product you would rather look at every day - the subtle roof light squares or the more grandiose lantern. Only you can answer this question!

Roof lights do not open, but if you do need some kind of ventilation in your roof product a lantern may be more suitable as we can offer roof vents for these.

Basically yes, a skylight is the American term and some people do refer to a roof light as a skylight. Our product is referred to as a flat roof light, as it is non-opening and sits at a slight pitch.

The Atlas roof lantern is considered the strongest on the market and is the perfect compliment to a new extension or refurbished room. The ultra-low sight-lines make it much more attractive than competitors roof lanterns!

The roof bars are also slimmer than normal at only 40mm. This gives a more contemporary look with more visible glass area, in comparison to most other lanterns on the market that have a much bulkier appearance.

Of course, the main benefit of any roof lantern or flat roof-light is the expanse of natural light you will get into the home. There is no better way to create a feeling of light and space than by installing a glazed roof product, which is why they are now almost standard on single-storey rear extensions. If you are adding an extension to your home and looking to create a more open plan, expansive feel, then a roof lantern or roof lights are highly recommended.

https://www.gfdhomes.co.uk/View or download Korniche Brochure using the buttons below

Korniche Brochure

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https://www.gfdhomes.co.uk/View or download Korniche Product Spec Guide using the buttons below

Korniche Product Spec Guide

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Get ready for Summer 2024 with glazed roofs!


Stunning bi-folding doors from £12.96 per month*

Glazed Roof Lantern

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13.9% APR Representative

Spread the cost over 3, 4, 5 or 10 years.

*Example based on a 3 pane bi-fold costing £2397, spread over 120 monthly payments

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Go BigWithout

The Korniche roof lantern offers impressive glass widths without the need for rafters. A standard rectangular lantern can go up to 3 metres x 2.5 metres with only four glass units.

CAD image of Korniche Hidden Gaskets
Reversed CAD image of Korniche Hidden Gaskets

Glass Lock

An innovative glass lock system stops the glass slipping under its own weight after installation, ensuring a lifetime of security and low maintenance.


The square roof lantern offers a contemporary pyramid design. This is popular with homeowners who want perfectly square openings, or perhaps two lanterns separated instead of one larger one.

Rendered Image displaying how the Korniche integrated sill is achieved.
image of yale lock cylinder

Quick & Easy
To Install

The Korniche lantern requires no cutting, trimming or silicone sealing during assembly. It can be installed in minutes and glazed in seconds by any competent tradesperson, eliminating the need for specialist installers.

Self Cleaning

We supply self-cleaning glass options as standard so that you don’t have to worry about constantly getting access to your roof glazing to clean it. Glass is available in clear, blue tinted, neutral tinted and aqua tinted.

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