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Wales · West Glamorgan

Roof lantern leak repairs in West Glamorgan

Dealing with a leaking roof lantern somewhere in West Glamorgan? We trace where the water gets in and repair the seal, capping, ridge, eaves or kerb that has failed. Our coverage includes Swansea, Neath, Gorseinon and the villages around them.

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A roof lantern leak is almost always a failed seal, a lifted capping, blocked eaves drainage or a problem where the kerb meets the flat roof — not a failed lantern. We carry out roof lantern leak repairs across West Glamorgan, with a guide price from your photos and a fixed price in writing before any work starts.

Rainwater running down an internal glazing bar of a roof lantern above a kitchen

Signs you need roof lantern leak repairs

  • Drips from a glazing bar or the eaves beam when it rains
  • Brown staining or bubbling paint on the plasterboard lining around the lantern
  • A leak that only appears in wind-driven rain from one direction

What usually causes it?

Blocked eaves drainage

Most lanterns collect water in a channel inside the eaves beam and let it out through weep slots. Leaves, moss and grit block the slots and the channel overflows indoors.

The kerb or roof junction

If the flat roof membrane isn't dressed high enough up the kerb, or the kerb has no fall, water sits against the joint and finds its way in under the lantern.

Roof lanterns in West Glamorgan

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.

What should you expect to pay for roof lantern leak repairs in West Glamorgan?

Guide price, per lantern£195–£595 ex VAT£234–£714 inc VAT

Guide price for roof lantern leak repairs: £195–£595 ex VAT (£234–£714 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?

In Wales, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010 (as applied in Wales), so we set out the route in writing first. 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?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

Roof lantern leak repairs in West Glamorgan: questions

Can you fix the leak in the rain?

We can make the lantern safe in wet weather, but sealants and tapes need a dry, clean surface to bond, so permanent repairs are done in a dry window.

Do I need to be home?

If we need to water-test or check the inside of the lantern, yes. Exterior-only work can sometimes be done with access arranged in advance.

Which towns in West Glamorgan do you cover?

All of West Glamorgan, including Swansea, Neath, Gorseinon, Port Talbot. Rural and remote addresses are covered by arrangement.

How do I get a price for roof lantern leak repairs in West Glamorgan?

Send a few photos of the lantern and the problem with your postcode, by WhatsApp or the form. We reply with a guide price and confirm the fixed price in writing before any work starts.

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