From Harpenden kitchen extensions to full orangery builds, our korniche roof lanterns service covers supply-only delivery and complete installation throughout Hertfordshire — same product, your choice of who fits it.
Free, no-obligation quotes · response within 1 working hour · supply-only or fully installed
Around Harpenden and the wider county, housing stock runs to garden-city housing, 1930s semis and a fast-moving extension market across the commuter towns. We've specified and supplied for exactly these property types across Hertfordshire, so recommendations come from real local precedent.
Every lantern is thermally broken aluminium as standard, glazed with 28mm argon-filled units, and available with self-clean and solar-control coatings. Supply-only orders include kerb specifications and fitting documentation; installed projects carry our written workmanship guarantee on top of the 10-year product cover.
Harpenden, Hertford, Bishop's Stortford and Cheshunt and the rest of Hertfordshire all sit inside standard coverage: free surveys, free quotes, and a response within 1 working hour.
The joint engineering. Korniche components machine together so precisely that the lantern assembles without silicone, external clips or cover caps — which is why installers love it and why the finished lines look so clean.
The frame itself can be assembled on the kerb in under 30 minutes by a competent installer; a full fit including glazing and flashing is comfortably a one-day job. Manufacture lead time is typically one to two weeks.
Yes — the system is fully thermally broken with no metal-to-metal path from outside to inside, and paired with argon-filled units it achieves U-values that comfortably satisfy Building Regulations for extensions.
Every Korniche is made to order, so 'custom' is the standard. You give us the external kerb size and the lantern arrives fabricated to those exact dimensions.
Yes — installation is available across Harpenden and Hertfordshire, and if you'd rather buy supply-only, kerbside delivery to Harpenden is included in our standard service.
Standard-size supply-only prices are on the site now; made-to-measure quotes for Harpenden usually come back the same working day, and installed projects are priced after a free survey.
Send the form and we’ll come back with honest prices — supply-only or installed — with a response within 1 working hour.
Prefer to talk? Call 0800 088 6248 or WhatsApp · sales@lantern-roof.com