Whether it's a drip at the eaves, a misted pane or a vent that won't close, we repair roof lanterns right across Gwynedd — and agree the price in writing before any work starts.
Repairs we carry out in Gwynedd
Leaks and weatherproofing
- Leak repairs
- Resealing
- Glazing bars and cappings
- Ridge and hips
- Eaves beams and gutters
- Upstands and kerbs
- Roof junctions
Glass, condensation and heat
Frames, vents and finishes
Inspection, maintenance and make-safe
Replacement, orangeries and commercial
In Gwynedd, as elsewhere, most lantern repairs cost a few hundred pounds — typically £165–£595 ex VAT — with your fixed price confirmed in writing first. See all guide prices.
Roof lanterns in Gwynedd
Wind-driven rain is the real test of a roof lantern, and the wetter west sees plenty of it. Leaks that appear only in a storm from one direction usually point to the cappings or eaves on that face — a useful clue when you send us photos.
Near the coast, salt in the air is hard on aluminium finishes and fixings; washing the frame occasionally and touching in chips keeps corrosion away.
Towns we cover in Gwynedd
Rules for lantern work in Wales
Most lantern repairs in Wales need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 (as applied in Wales) apply and we confirm how the work will be signed off before we start. Listed buildings in Wales need listed building consent from the local planning authority for alterations, with Cadw guidance on historic buildings; check with the council before changing a lantern on a listed property. See our building regulations guide for the detail in Wales.
Roof lantern repairs in Gwynedd: questions
Do you cover all of Gwynedd?
Yes — including Bangor, Gwynedd, Caernarfon, Dolgellau, Holyhead, Llangefni, Porthmadog. Remote and island addresses are covered by arrangement.
What are the most common lantern problems in Gwynedd?
Failed sealant and lifted cappings, blocked eaves drainage, kerb and roof-junction leaks, misted glass units and condensation on cold mornings.
How do I book a repair in Gwynedd?
Send photos and your postcode by WhatsApp or the form. We reply with a guide price, then confirm a fixed price and a date in writing.