In Bangor, Gwynedd, as everywhere, aluminium lanterns are strong and slim, but they still rely on gaskets, cappings and seals that wear. Send photos and we'll tell you what we think has failed.

Signs you need aluminium roof lantern repairs
- Leaks at bars or ridge
- Chalky or chipped powder coat
- Corrosion at cut edges or fixings in coastal areas
What usually causes it?
Worn gaskets
Gaskets do the weatherproofing; they harden and shrink with age.
Finish damage
Scratches and chips expose bare metal; coastal air speeds up corrosion.
Roof lanterns in Bangor, Gwynedd
Damp, mild winters keep moss and algae growing on flat roofs and lantern frames, which holds water against seals and blocks weep slots. Regular clearing makes a real difference in wetter areas.
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.
If you're just outside Bangor, Gwynedd, we also cover Llangefni (8 miles), Caernarfon (8 miles), Llandudno (14 miles).
What should you expect to pay in Bangor, Gwynedd?
Guide price for aluminium roof lantern repairs: £195–£695 ex VAT (£234–£834 inc VAT), per lantern. Towers or scaffold, where needed, are priced into the quote. Your fixed price is confirmed in writing before any work starts.
Do you need permission in Wales?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in Wales. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010 (as applied in Wales); we confirm in writing which route applies before any replacement. 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.
How does it work?
- Send photosWhatsApp or upload a few photos and tell us when it leaks.
- Guide priceWe reply with a guide price and whether a visit is needed.
- Fixed price in writingYou approve the price and the date before anything starts.
- Repair and testWe fix what's failed, water-test where it matters, and send photos.
Aluminium roof lantern repairs in Bangor, Gwynedd: questions
Do you cover Bangor, Gwynedd?
Yes. We cover Bangor, Gwynedd, including the LL57 postcode area, as part of Gwynedd. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
Which places near Bangor, Gwynedd do you cover?
As well as Bangor, Gwynedd, we cover nearby Llangefni, Caernarfon, Llandudno, Colwyn Bay and the rest of Gwynedd.
What do aluminium lantern repairs cost?
Most component repairs are £195–£695 ex VAT per lantern, confirmed in writing before work starts.
Can you repaint an aluminium lantern?
Yes — see roof lantern respraying for on-site spray finishes.
Other lantern repairs in Bangor, Gwynedd
- Glazing bar and capping repairs in Bangor, Gwynedd
- Ridge and hip repairs in Bangor, Gwynedd
- Eaves beam and gutter repairs in Bangor, Gwynedd
- Cracked lantern glass replacement in Bangor, Gwynedd
- Leak investigation and inspection in Bangor, Gwynedd
- Commercial roof lantern repairs in Bangor, Gwynedd
Aluminium roof lantern repairs near Bangor, Gwynedd
More about aluminium roof lantern repairs · All roof lantern repairs in Bangor, Gwynedd