Homeowners and builders in Porthmadog come to us for ultrasky roof lanterns for a simple reason: honest supply-only prices, made-to-measure fabrication and installation available right across Gwynedd.
Free, no-obligation quotes · response within 1 working hour · supply-only or fully installed
The Gwynedd market is defined by slate-built terraces and Snowdonia farmhouses — exposure ratings and slate-grey frames are popular — and our Porthmadog installs reflect that, with specifications matched to the property rather than pulled off a shelf.
Specification doesn't change with postcode: thermally broken frames, 28mm argon-filled glazing, marine-grade powder coating and a 10-year guarantee, whether you buy supply-only for your own builder or book our installation teams.
Our teams cover Porthmadog alongside Dolgellau, Bangor and Caernarfon and the rest of Gwynedd — surveys are free, quotes carry no obligation, and we aim for a response within 1 working hour.
uPVC if budget leads — it's the most affordable route to a quality lantern. Aluminium if sightlines and colour matter most. Structurally they share the same engineered ridge, so neither compromises on strength.
Up to 4 metres, which covers almost every domestic extension. That means no horizontal bars crossing the ceiling void — just clean glass to the ridge.
Yes — it's built on Ultraframe's Classic roof platform, one of the most-installed conservatory and lantern roof systems in the UK, with decades of structural track record.
28mm double-glazed units as standard, with self-clean coatings and blue or neutral solar control available. We'll match the glass to the room's orientation.
We do. Porthmadog and the surrounding Gwynedd towns are core territory for both our installation teams and our supply-only delivery routes.
For Porthmadog: same-day made-to-measure quotes, standard sizes delivering in around 7–10 working days, and installation slots booked to suit once the survey's done.
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