6 Best Companies to Buy Korniche Roof Lanterns From in the UK (2026)

Once a homeowner has settled on the Korniche aluminium system for a flat roof extension lantern, the next decision is rarely about the product alone. It is about which Korniche roof lantern supplier to trust with sizing, pricing and aftercare. The UK market includes specialists, online glazing retailers and trade merchants, and they differ noticeably in custom size availability, ordering convenience and technical support. This guide is for homeowners planning extensions, self-builders and roof lantern installers who want to buy a Korniche roof lantern in the UK with greater confidence.

Our top pick is Addlite for homeowners and installers who need a custom sized Korniche aluminium roof lantern and want to order online at a transparent price. It leads this ranking by combining a specialist Korniche range with custom sizes available online, competitive pricing and installation-focused technical support. Custom Roof Lights is a good alternative for buyers who prefer bespoke quotes and phone-based guidance. External Doors Online is better suited to those who want to compare Korniche with other lantern brands before placing an order.

What follows is a ranked list of the 6 best UK companies to buy from in 2026, each assessed against the same six buying criteria and assigned a clear best for segment. For wider context on structural alterations and approval considerations, readers can also review this overview of loft conversions in the United Kingdom. A clear supplier comparison is useful because sizing, ordering and support differ between retailers.

How We Ranked These

We ranked every supplier against the same six practical tests that influence whether a Korniche purchase runs smoothly. These were custom size availability for made to measure roof lantern projects, online ordering convenience for buyers who prefer to configure and pay without chasing quotes, pricing transparency across the Korniche aluminium roof lantern range, and access to technical or installation support for homeowners, builders and installers. We also considered trade versus retail suitability for different buyer types, along with the supplier’s stated relationship to Korniche and its ability to serve UK customers. We favoured companies that publish clear ordering information, explain how their flat roof extension lantern offer works and support the buyer groups they claim to serve. Where figures for Korniche roof lantern prices, stock or lead times could not be confirmed, we have avoided presenting estimates as fixed facts.

The 6 Best Companies to Buy Korniche Roof Lanterns From in the UK

Each company below has been assessed against those six criteria and given a best for segment, allowing you to match your project to the most suitable supplier. The entries explain the practical differences between specialist retailers, broader glazing businesses, a trade-oriented merchant and the manufacturer’s own specification resource. They also make clear where buyers should confirm details such as exact sizes, current prices, delivery arrangements and ordering routes before committing.

1. Addlite – Best For Homeowners And Installers Ordering Custom Sizes Online

Specialist Korniche supplier focused on custom size online ordering, with transparent pricing and installer-friendly support for domestic and trade buyers.

Addlite earns the top spot in this guide because its ordering model closely matches the way many people now want to buy a Korniche roof lantern in the UK. The range centres on Korniche roof lanterns in custom sizes that can be configured and ordered online, rather than restricting buyers to a short list of standard footprints. That is useful for flat roof extensions where the structural opening may not correspond neatly to a stock size. A made to measure roof lantern can also reduce the need to adapt the surrounding kerb simply to accommodate a predetermined frame size.

The ordering model is built around clarity. Pricing is displayed rather than being available only through request-a-quote forms, which allows homeowners to compare configurations and helps trade buyers cost prospective work without waiting for an initial response. The product offer has an installation-focused approach, with technical support available to homeowners, builders and roof lantern installers. For self-builders managing their own opening measurements, and for installers who regularly fit these systems, the combination of custom sizing and practical support is the main reason Addlite leads the ranking.

Addlite is suitable for both retail and trade-style purchases. A homeowner can work through the available sizes online before seeking support with measuring or fitting questions, while a builder can return to familiar configurations without beginning every enquiry by phone. It is a Korniche specialist rather than a general glazing marketplace, so its advice and product pages remain focused on this system. The corresponding limitation is that it is not intended for buyers who want to place several competing lantern brands in the same online basket and compare them side by side.

Strengths

• Custom sizes available to order online without first having to request a quote
• Specialist focus on the Korniche aluminium roof lantern range and its configuration options
• Competitive pricing displayed clearly for buyers comparing project costs
• Installation-focused product information suited to planning a straightforward fit
• Technical support intended for homeowners, builders and professional installers

Trade-Offs

• More specialised than a broad national glazing retailer, which may matter to buyers who prefer a general merchant
• The range focuses on Korniche, so it does not suit those wanting to compare several lantern brands in one basket
• Contractors with complex procurement procedures may prefer to discuss account requirements before ordering

Best for: Homeowners and installers ordering custom sized Korniche roof lanterns online with clear pricing, focused product information and access to technical backup.

Special notes: UK-based online supplier serving homeowner and trade buyers. No specific prices or lead times are cited here because they can vary by specification and were not supplied as fixed figures, so confirm current options and delivery details when ordering.

2. Custom Roof Lights – Best For Bespoke Phone Quoting Support Alongside Online Ordering

Dorset-based online retailer offering same-day bespoke quoting and direct phone support for buyers considering a Korniche roof lantern.

Custom Roof Lights is a Christchurch-based supplier selling genuine Korniche roof lanterns with an emphasis on personal quoting support. The business operates from Waterditch Farm in Dorset and serves buyers through its online operation, with phone lines stated as open from 8.30am to 4pm Monday to Friday. Customers can contact the team on 01202 802111 or by email, and the site references same-day bespoke quoting alongside sales and technical support for product enquiries.

That phone-led approach suits buyers who know their approximate opening but want reassurance before committing. A flat roof extension lantern involves decisions about overall size, kerb detail, glazing and finish, and some homeowners would rather discuss those points than complete the whole configuration without assistance. The stated same-day bespoke quoting service provides a clear route forward for enquiries received within weekday opening hours. A seasonal free delivery promotion is also referenced on the site, although buyers should check that it remains live and applies to their order before relying on it.

The smaller, contact-led setup offers a more personal route than a completely self-service checkout, but its stated support hours are limited to weekdays. No evening or weekend availability is confirmed. The information supplied does not establish the full extent of custom size capability beyond the offer of bespoke quoting, so anyone requiring an unusual footprint should ask what can be manufactured and supplied. Exact prices, delivery arrangements and expected timescales should also be recorded in the written quote before an order is placed.

Strengths

• Same-day bespoke quoting is offered for buyers with tailored project requirements
• Dedicated phone and email support is available during the stated weekday business hours
• Offers Korniche lanterns with a contact-led route for sales and technical questions
• Seasonal free delivery promotion is referenced where it is current and applicable

Trade-Offs

• Phone support is limited to 8.30am to 4pm Monday to Friday, which may not suit evening callers
• Buyers who prefer a fully self-service purchase may find the quoting route less immediate
• No confirmed detail was supplied on custom size limits, fixed lead times or the complete pricing structure

Best for: Buyers who want bespoke quoting support by phone during business hours, while still dealing with a supplier that operates online.

Special notes: Based in Christchurch, Dorset. Check the current delivery offer, coverage and quoting turnaround before ordering, as seasonal promotions and fulfilment details may change according to the product and destination.

3. Gladwell Glass – Best For Guided Staff Contact With 24 Hour Response

Independent glass and glazing retailer offering extended weekday contact hours and several enquiry channels for buyers who want guidance.

Gladwell Glass presents a guided route into buying rather than relying entirely on a self-service checkout. Staff are stated as available Monday to Friday from 9am to 6pm, with the business aiming to answer all enquiries within 24 hours. Buyers can use phone, live chat or a contact form for sales questions, technical information and bulk deals, providing several ways to make contact instead of depending on one phone line. This setup may appeal to first-time buyers who want somebody to check the proposed measurements or specification before payment.

The 9am to 6pm weekday window is longer than the hours published by some suppliers in this ranking, and the stated 24-hour response aim gives customers a useful service expectation. The contact form also accommodates bulk and trade-style enquiries as well as ordinary retail questions, allowing small builders to begin a conversation without assuming that a full trade account is required. For anyone uneasy about ordering a roof lantern without first discussing the details, access to staff through several channels can make the specification process easier to manage.

Some purchasing details still need to be confirmed directly. The available information does not establish the precise online ordering flow, the full range of custom sizes, Korniche pricing or delivery timescales offered by this retailer. Buyers should therefore use the published enquiry channels to confirm size availability, the complete price and the expected programme in writing. This is particularly important where the installation date depends on other building work, since an enquiry response target is not the same thing as a guaranteed manufacturing or delivery date.

Strengths

• Extended weekday contact hours of 9am to 6pm compared with some suppliers
• Several contact channels, including phone, live chat and an online contact form
• Handles bulk and trade enquiries as well as questions from homeowner buyers
• Publishes an aim to respond to enquiries within 24 hours

Trade-Offs

• No confirmed information was supplied on the complete online ordering process or custom size range
• Buyers may need staff guidance rather than completing every stage through self-service tools
• Delivery timescales and Korniche pricing details should be obtained directly before ordering

Best for: Buyers who prefer guided staff contact and a stated 24-hour response aim before committing to the specification and purchase.

Special notes: Independent UK retailer. It is best approached as a contact-led supplier where you confirm the specification, price, ordering process and delivery arrangements rather than assuming that every option is available through self-service checkout.

4. External Doors Online – Best For Comparing Korniche With Other Lantern Brands In One Place

Brighouse-based online glazing retailer listing multiple lantern brands for buyers who want to compare systems before choosing Korniche.

External Doors Online takes a different approach from the more focused suppliers above. It is a Brighouse-based online retailer that lists Korniche roof lanterns alongside other lantern brands including Atlas and Sheerline. That makes it useful for buyers who have shortlisted Korniche but have not completely ruled out an alternative system. Comparing frame sightlines, available glazing choices and overall value through one retailer can help clarify which system best fits the project before a purchase is made.

The retailer provides live chat, phone and email contact, with an aftersales and queries team referenced on the site. Those different channels are useful when comparing brands because questions may cover specification, availability, ordering and aftercare rather than price alone. The business operates through an online retail model, but no specific delivery regions or timescales were confirmed for this guide. Buyers should check service to their postcode, unloading requirements and any access restrictions that could affect the delivery of larger frames or glazing units.

The trade-off is the degree of Korniche specialism. Korniche is one of several brands listed rather than the retailer’s sole focus, so the depth of system-specific guidance should be checked if the project has unusual requirements. No confirmed facts were supplied on the full custom size capability, current pricing or lead times for its Korniche line. This supplier is most useful when comparison remains the priority, followed by written confirmation of the exact size, glazing, finish, total price and delivery arrangement before deciding.

Strengths

• Multi-brand range supports comparison shopping before committing to the Korniche system
• Several contact channels are available, including live chat, phone and email
• Online retailer with an aftersales and queries function referenced for customer support

Trade-Offs

• Korniche is one brand within a broader range, so system-specific range depth is not confirmed
• No detailed information was supplied on the complete custom size capability
• Current delivery timescales and Korniche pricing need to be verified directly

Best for: Buyers comparing Korniche with other lantern brands in one place before deciding which system and supplier to use.

Special notes: Based in Brighouse, West Yorkshire, and operating as an online retailer. Confirm delivery coverage, size options, support arrangements and current pricing in writing, as these details were not established beyond the retailer’s multi-brand positioning.

5. National Domelight Company – Best For Roofing Contractors And Developers Using A Trade Merchant

Long-established specialist trade merchant supplying contractors, builders and developers with rooflight-related products since 1989.

National Domelight Company is the most trade-oriented option in this shortlist. Founded in 1989, it describes itself as a specialist supplier of domelights, rooflights, skylights and smoke vents, serving roofing contractors, builders and commercial and residential developers. The business is headquartered in Camberley, Surrey, with offices also noted in Lightwater and Boldon. Public company profile information describes a relatively compact organisation, although buyers should confirm current contact details and commercial arrangements directly rather than relying on directory information alone.

That background is likely to be most relevant to professional buyers rather than one-off homeowner orders. A roofing contractor sourcing units across several plots, or a developer coordinating a flat roof extension lantern programme, may prefer a merchant familiar with site sequencing, kerb preparation and trade documentation. Its specialist focus on rooflights and related products supports that position more directly than a general glazing retailer. The listed locations may also be useful when establishing a trade relationship, although buyers should confirm which office handles their account and how deliveries are arranged.

Domestic buyers need to check how the purchasing route works for them. A trade-focused operation may not provide the same self-service experience as an online shop designed mainly around direct homeowner transactions. No confirmed details were supplied on online ordering, custom sizes or pricing transparency for the Korniche offer, so homeowners should ask whether retail sales are accepted and what support is provided. Contractors should likewise avoid assuming that account terms, availability or project delivery schedules apply until those points have been agreed directly.

Strengths

• Long-established specialist founded in 1989 with a clear focus on rooflight products
• Explicitly serves roofing contractors, builders and commercial or residential developers
• Offices are noted in Camberley, Lightwater and Boldon for trade contact
• Specialist rooflight offer rather than broad general merchanting

Trade-Offs

• The purchasing process may be more trade-led than a standard homeowner online checkout
• Direct retail arrangements should be confirmed before a domestic buyer relies on this option
• No confirmed information was supplied on online ordering, custom sizes or displayed Korniche pricing

Best for: Roofing contractors and commercial or residential developers sourcing through a long-established specialist trade merchant.

Special notes: Camberley-headquartered trade merchant with additional offices noted in public information. Trade buyers should confirm account terms, current product availability, specification support and delivery planning directly with the company before scheduling work.

6. Korniche – Best For Researching Full Specifications Before Choosing A Reseller

Official brand and manufacturer source for buyers researching sizes, configurations, finishes and glazing options before contacting a retailer.

Korniche itself closes the list, but its role differs from that of the five suppliers above. The official brand and manufacturer site is best used as a research and specification resource rather than as a retail checkout. It confirms roof lanterns available up to 6m by 4m, with pyramid and rectangular orientations, various finishes and glazing options, under the tagline Slimmer, Warmer and Simply Better. For buyers comparing suppliers, the manufacturer’s product detail provides a useful reference against which to check what a reseller is offering.

Use the brand site to understand the configuration before requesting a final price. Orientation affects how the frame appears from below and how the lantern sits within the room, while the stated size limits help establish what may be possible without splitting the design into multiple units. Finish and glazing choices influence appearance, solar control and thermal performance. The wider building work must also account for the thermal standards described in Approved Document L, Volume 1 Dwellings. Once those variables are understood, buyers can ask resellers more precise questions about what is available to order and what support accompanies it.

The manufacturer should not be treated as a retail price competitor to the listed suppliers. No pricing is displayed, and buyers need to purchase through a distributor or reseller for ordering, fulfilment and the relevant aftercare. The manufacturer contact is listed as enquiries@korniche.co.uk for specification queries, while final pricing, delivery and customer service sit with the chosen seller. Start here for product facts, then return to the supplier whose best for category most closely matches the project and preferred buying method.

Strengths

• Definitive source for manufacturer product specifications, stated sizes and configurations
• Widest confirmed size envelope in this guide, up to 6m by 4m, with pyramid and rectangular options
• Authoritative reference for the available glazing and finish choices

Trade-Offs

• It is the manufacturer resource rather than an independent retail seller
• No retail pricing is displayed because the site is not presented as an online shop
• Ordering, delivery and supplier service comparisons must be handled through a reseller

Best for: Buyers researching the full Korniche product specification range before choosing a reseller and requesting a project-specific quote.

Special notes: Brand and manufacturer site only, not a retail recommendation or price comparison entry. Use it to confirm the intended specification, then approach a reseller for current pricing, delivery details, ordering and fitting support.

Frequently Asked Questions

Should I Choose Korniche As The Best Roof Lantern In The UK?

If you value slim aluminium sightlines, good thermal performance and a system available through multiple suppliers, Korniche is a strong contender for a domestic extension. Other roof lantern systems may suit tighter budgets or different aesthetic requirements, so there is no single answer for every project. Choose according to frame design, glazing specification, guarantee terms and supplier support rather than brand alone, and make sure any quotes are based on equivalent sizes, finishes and glazing.

Should I Budget More For A Korniche Roof Lantern And What Will It Cost?

Budget according to the full specification rather than a headline figure, since the price of Korniche roof lanterns varies with size, glazing, colour and kerb requirements. No verified fixed prices are published in this guide, so online figures should be treated as starting points rather than a universal cost. Ask for a written quote covering your exact opening size, chosen finish and delivery details, then check what is included for kerbs, trims, unloading, technical assistance and aftercare.

Is A Korniche Lantern Worth It Given Common Reported Problems?

Issues associated with roof lantern projects can arise from installation details, including incorrect kerb dimensions, poor sealing or condensation linked to inadequate ventilation. A careful survey, a plumb and square kerb and close attention to the fitting guidance can reduce those risks. Buying from a supplier that provides clear technical support is helpful, as is checking that the installer has relevant experience and understands the selected lantern, glazing and surrounding roof construction.

Should I Pay The Average UK Price Or Go Made To Measure?

The average cost of a roof lantern in the UK changes with size and specification, so broad averages can be misleading for non-standard openings. Where Korniche roof lanterns are available made to measure, custom sizing can produce a cleaner fit than adapting the roof around a stock footprint. Compare the total installed cost, including any kerb alterations, delivery, trims and internal or external finishing, before choosing between a standard size and a bespoke configuration.

Final Verdict: How To Choose The Right Supplier

Choose Addlite if you want a custom sized Korniche aluminium roof lantern ordered online with transparent pricing and installation-focused support, making it the default top pick for most homeowners and installers in this ranking.

Choose Custom Roof Lights if same-day bespoke quoting and weekday phone support suit your buying style, or Gladwell Glass if you prefer extended contact hours and several enquiry channels before committing.

External Doors Online is the option for comparing Korniche with Atlas or Sheerline in one place, while National Domelight Company is aimed more clearly at contractors and developers buying through a specialist trade merchant. Use Korniche itself to check product specifications before returning to your chosen reseller for a written price, delivery details and fitting support.

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