Whether it's a single lantern over a Caernarfon kitchen or a multi-roof development, our opening & vented 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
Gwynedd property here means slate-built terraces and Snowdonia farmhouses — exposure ratings and slate-grey frames are popular. That local context shapes what we recommend in Caernarfon — 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 Caernarfon we also serve Porthmadog, Pwllheli and Dolgellau and the wider county — so if you're comparing quotes anywhere in Gwynedd, ours is free, fast and without obligation.
Not in a quality system — the sash closes onto continuous gaskets and locks down tight. The vent panes carry the same glazing spec and guarantee as the fixed glass around them.
Over kitchens and in south-facing rooms, emphatically yes — venting at the highest point purges heat and steam faster than any window can. In cooler, well-ventilated rooms a fixed lantern plus good doors often suffices.
The rain sensor closes it automatically — it's a standard part of the package, not an optional extra, so an open vent and a surprise shower never meet.
Only on certain systems — vents are normally factory-built into the roof slope. Send photos of your lantern and we'll confirm whether a retrofit sash exists for it or whether replacement is the honest answer.
Yes — installation is available across Caernarfon and Gwynedd, and if you'd rather buy supply-only, kerbside delivery to Caernarfon is included in our standard service.
Standard-size supply-only prices are on the site now; made-to-measure quotes for Caernarfon 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