Whether it's a single lantern over a Porthmadog kitchen or a multi-roof development, our stratus roof lanterns service pairs supply-only pricing with nationwide installation — and Gwynedd is core territory for both.
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.
Yes — we dispatch Stratus lanterns UK-wide for builder installation, or fit them ourselves through our nationwide teams.
Stratus is Synseal's contemporary aluminium lantern system, designed with thermal efficiency as the headline feature — chambered thermally broken profiles, warm-edge glazing and independent TUV certification of its U-values.
With the upgraded glazing package it achieves U-values around 1.0 W/m²K — comfortably beyond what Building Regulations require for replacement rooflights or extensions, and certified rather than just claimed.
Yes — the square-cut internal lines and the white or heritage colour options sit comfortably in period rooms, while the same frame in anthracite reads as fully contemporary.
Yes — installation is available across Porthmadog and Gwynedd, and if you'd rather buy supply-only, kerbside delivery to Porthmadog is included in our standard service.
Standard-size supply-only prices are on the site now; made-to-measure quotes for Porthmadog 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