• Ultra Slim, Classic Look: Korniche lanterns feature some of the slimmest rafters and ridge profiles available – the internal ridge is only 57mm deep and the rafter bars are slim too. This means when you look up, you see more glass and less frame, creating that elegant “frameless” look. From outside, the lantern has a low profile and fine lines reminiscent of timber construction (Victorian-inspired ridge detail) but with all the benefits of aluminium. It’s a perfect blend of traditional style and modern slimline engineering – truly one of the most attractive roof lanterns on the market.

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• Unbeatable Strength & Clear Spans: Korniche is engineered to be the strongest lantern in its class – it can span up to 6m x 4m with minimal structure. The proprietary ridge design and die-cast aluminum joints create a structure that can support heavy loads (Korniche boasts that a 6x4m lantern can withstand 8 tonnes). This means you can have expansive lanterns without additional rafters cluttering the view – often requiring no tie bars or secondary supports that some other systems need. The result is a clear, open roof light with uninterrupted views of the sky.

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• Thermally Efficient: Fully thermally broken construction and high-performance glazing make Korniche lanterns very insulating. The lantern profiles have polyamide breaks and the design eliminates cold bridging. With a standard double-glazed unit, Korniche achieves roof U-values around 1.2 W/m²K, keeping your extension warm in winter and cool in summer. The ridge and eaves are insulated and there are foam seals at all joints, meaning no drafts or condensation issues. It even exceeds the usual Part L requirements for glazed roofs. You get the wow factor of a glass roof without a huge energy penalty.

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• Fast & Easy Installation: One of Korniche’s stand-out features is how quickly it can be installed. It arrives in kit form with pre-fitted gaskets and an innovative clip system – no drilling or cutting on site. A typical installer can assemble a Korniche lantern in under 60 minutes, meaning less disruption and a perfect fit. For the homeowner, this means your roof is opened up for minimal time (important if retrofitting) and the integrity of installation is high (less chance for installer error given the simplicity). All fixings are hidden, and the lantern literally “clicks” together in many places, giving a strong finish. It’s a hassle-free product from an installation perspective, which translates to consistent quality for you.

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• Low Maintenance, Long Life: Made from high-quality aluminum with marine-grade powder coating, Korniche lanterns are virtually maintenance-free. There are no external screws or flashings visible – everything is internal or capped, so you won’t have paint flaking or rust. The design has a slight slope built into the top of the rafters and ridge, ensuring water runs off and self-cleans the glass more effectively. All seals are long-lasting EPDM and the glass units are usually specified with self-clean and solar control. Overall, the Korniche is built to last decades with minimal upkeep – just occasional cleaning of the glass and frames. They also come with a substantial warranty (often 10-20 years) for peace of mind.

Korniche roof lanterns have been a game-changer for many builders and installers due to their swift install time and customer appeal. As a trade partner, when you order a Korniche lantern from BM Bifolding Doors, we’ll supply you with the complete kit, instructions, and any support needed. Trade installers love that no silicone sealant is required on the joints – everything uses seals and logical assembly, so it’s far less messy than traditional lanterns where you might spend ages sealing each connection. The likelihood of call-backs is greatly reduced because the system is designed to fit together correctly every time (all parts are precision-made). We can provide training or walkthroughs if it’s your first time with Korniche, but many find the process intuitive. Additionally, we deliver on-site with protective packaging – the last thing you want is a scratch on a hip bar, etc., and Korniche packaging is excellent. The speed of assembly means you can schedule lantern fitting later in a project timeline and still finish on time – or fit it in unpredictable weather windows quickly. It’s worth noting for trades: because Korniche has such a clean finish, there’s little “making good” after – e.g., inside the lantern has a neat plasterboard stop profile; you or the plasterer can run plaster right up to it for a crisp edge. We also supply these lanterns with glass fitted or loose – typically loose units to lift in after frame assembly. The glass spec from factory is top-notch (usually 4-20-4 argon, self-clean, low-e, toughened); we ensure it’s correct for building regs and comfort. From a sales perspective, having the Korniche in your lineup is a big plus – it’s well-known, heavily advertised (by the manufacturer), and customers often ask for it by name because of reviews or seeing it online. So it sells itself in many ways. And we as your supplier ensure smooth ordering: provide us the roof opening size, desired colour and spec, and we handle the rest. The turnaround is relatively quick for such a custom item, and we’ll coordinate delivery to site to align with your schedule. In short, for trade professionals, Korniche lanterns simplify a potentially complex part of an extension build, letting you deliver a high-end feature without high complexity.

Choosing a Korniche Roof Lantern for your project means you’re investing in a top-of-the-line product that will become a centerpiece of your home. Homeowners consistently rave about the transformative effect: rooms that were once dark become illuminated sanctuaries. Because the Korniche has such slim frames and no bulky ridge joints, when you look up, it’s almost like a clear glass roof with just delicate outlined structure. That means more sky, more sun, more stars at night – a truly uplifting environment. You’ll notice how the space feels larger and more open too; vertical expansion of space is an often overlooked aspect of design, and a lantern provides that height and airiness. Practically, you’re not trading comfort for looks: Korniche’s thermal performance keeps your room from becoming an oven in summer or an icebox in winter. Many customers opt for the blue-tint solar control glass which cuts heat and glare – on a bright day, it gives a slight blue sky hue which is very pleasant, yet still very clear at night. Self-clean glass is another hero – it won’t eliminate cleaning, but many find they hardly ever need to manually clean it; natural rain and the coating do the job. For business owners (like cafe owners who incorporate a lantern, or say a small venue with an orangery), the Korniche adds real value – it’s impressively strong, so you don’t worry about safety or leaks with guests around, and it aesthetically impresses clients, possibly increasing your patronage appeal or property value. The installation speed means if you’re retrofitting to an existing roof, the disruption is minimal; a skilled crew can often remove an old rooflight and drop in Korniche in the same day, weather permitting. From a maintenance perspective, aluminium and glass on a roof lantern is about as low-maintenance as it gets. No painting timber, no worrying about uPVC discolouring or warping. And because Korniche hides all fixings, you don’t have rubber bungs or screws that degrade over time – it stays pristine. Another plus: no internal bars needed – many older lanterns required tie-bars across to stop spread; Korniche doesn’t for most sizes, so your view upward isn’t marred by a horizontal bar. In essence, for homeowners or anyone enjoying the space below, the Korniche lantern provides clear views, peace of mind, and a definite “wow” factor. Many tell us it’s the single best decision they made in their extension design.