The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Llandrindod Wells (LD1) and we'll tell you which it is — with the price agreed in writing before any work.

What you might be seeing
- Splits, blisters or lifted edges in the roof covering by the kerb
- Missing or loose edge trims and flashings
- Ponding on the roof next to the lantern
Why it happens
Unbonded membrane
EPDM or single-ply that has come away from the kerb lets water run behind it.
Cracked GRP
Fibreglass roofs can crack at the kerb corner where movement concentrates.
About Llandrindod Wells and the LD1 area
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.
We cover Llandrindod Wells as part of Powys, about 19 miles from Newtown.
Close by, we also cover Newtown (19 miles), Brecon (20 miles), Welshpool (30 miles).
What should you expect to pay in Llandrindod Wells?
Typical range: £245–£695 ex VAT, which is £294–£834 with 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?
- 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.
Flat roof junction and flashing repairs in Llandrindod Wells: questions
Do you need to visit to price flat roof junction and flashing 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 Llandrindod Wells?
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.
What does a junction repair cost?
Usually £245–£695 ex VAT, confirmed in writing before work starts.
Can you repair a GRP roof without it showing?
Repairs are colour-matched as closely as possible, but new topcoat next to weathered topcoat can look slightly different at first.
Other lantern repairs in Llandrindod Wells
- Glazing bar and capping repairs in Llandrindod Wells
- Aluminium roof lantern repairs in Llandrindod Wells
- Opening vent and actuator repairs in Llandrindod Wells
- Leak investigation and inspection in Llandrindod Wells
- Urgent leak make-safe in Llandrindod Wells
- Commercial roof lantern repairs in Llandrindod Wells
Flat roof junction and flashing repairs near Llandrindod Wells
More about flat roof junction and flashing repairs · All roof lantern repairs in Llandrindod Wells