Most roof lantern problems in Porthmadog can be repaired without a new lantern: resealing, cappings and gaskets, eaves drainage, kerbs, glass units and vents.
Repairs we carry out in Porthmadog
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 Porthmadog, 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.
Covering Porthmadog and nearby
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.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
Porthmadog is around 21 miles from Bangor, Gwynedd, and both are within our Gwynedd coverage.
Neighbouring places we cover include Pwllheli (12 miles), Caernarfon (16 miles), Dolgellau (16 miles).
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.
Roof lantern repairs in Porthmadog: questions
How do I get a price for roof lantern repairs in Porthmadog?
Send a few photos of the lantern and the problem, with your Porthmadog postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Do you need to visit to price roof lantern repairs?
Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.
Can you repair a lantern someone else installed in Porthmadog?
Yes. We repair lanterns whoever fitted them. If yours is still under the installer's warranty, contact them first so you don't affect it.