We've made roof lanterns straightforward for Seaham: order supply-only with delivery to your door, or book our fitting teams and have the whole project — survey to seal — handled for you.
Free, no-obligation quotes · response within 1 working hour · supply-only or fully installed
Durham property here means colliery terraces and stone market towns with growing extension and conversion demand. That local context shapes what we recommend in Seaham — from glass specification to frame colour — before a single quote is written.
Frames are thermally broken aluminium, glazing is 28mm argon-filled with self-clean and solar options, and everything is made to measure. Buy supply-only with kerbside delivery, or have our fitters handle the lot under a written workmanship guarantee.
From Seaham we also serve Consett, Chester-le-Street and Peterlee and the wider county — so if you're comparing quotes anywhere in Durham, ours is free, fast and without obligation.
Standard sizes below — made to measure quoted same day. Installation available nationwide if you’d rather we fit it.
Thermally broken aluminium · self-clean & solar glass options · 7–10 working days
Thermally broken aluminium · self-clean & solar glass options · 7–10 working days
Thermally broken aluminium · self-clean & solar glass options · 7–10 working days
A 150mm minimum upstand is the standard requirement. It lifts the lantern clear of standing water on the flat roof and gives the flashing somewhere to dress. If your upstand isn't built yet, we'll supply the exact external kerb dimensions so your builder can form it ready for the lantern.
A correctly installed modern lantern shouldn't leak. Failures almost always trace back to the upstand or flashing rather than the lantern itself, which is why our installation teams dress and seal the junction as part of every fit, and why supply-only orders ship with full fitting instructions.
Yes — thermally broken frames and argon-filled units mean a modern lantern performs far better than the polycarbonate roofs people remember. With a solar-control upgrade the room stays comfortable in summer too.
Most single-lantern installations are completed in a day once the upstand is ready. Larger or multiple-lantern projects typically run one to two days including flashing and internal making good.
Yes — Seaham is inside our standard Durham coverage. Our fitting teams survey and install throughout the area, and supply-only deliveries run to Seaham on dedicated glass transport.
Stocked standard sizes typically deliver to Seaham within 7–10 working days; made-to-measure fabrication adds to that, and we confirm the slot when you order so it lands with your build programme.
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