In Swansea, as everywhere, the junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos and we'll tell you what we think has failed.
Is it time for flat roof junction and flashing repairs?
- 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
Cracked GRP
Fibreglass roofs can crack at the kerb corner where movement concentrates.
Missing trims
Without a trim or flashing to protect the top edge, water gets in behind the membrane.
Roof lanterns in Swansea
Western and upland parts of the UK get more rain and more wind-driven rain than the east, and that's what finds weak cappings and blocked eaves first. Lanterns here benefit from a check of the bars on the most exposed face and a clear eaves channel before winter.
Close by, we also cover Gorseinon (5 miles), Neath (7 miles), Port Talbot (7 miles).
Guide prices for flat roof junction and flashing repairs in Swansea
Most flat roof junction and flashing repairs jobs come in between £245 and £695 ex VAT (£294–£834 including 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.
Flat roof junction and flashing repairs in Swansea: questions
How do I get a price for flat roof junction and flashing repairs in Swansea?
Send a few photos of the lantern and the problem, with your Swansea postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Which places near Swansea do you cover?
As well as Swansea, we cover nearby Gorseinon, Neath, Port Talbot, Llanelli and the rest of West Glamorgan.
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 Swansea
- Glazing bar and capping repairs in Swansea
- Opening vent and actuator repairs in Swansea
- Roof lantern respraying in Swansea
- Leak investigation and inspection in Swansea
- Urgent leak make-safe in Swansea
- Orangery lantern repairs in Swansea
Flat roof junction and flashing repairs near Swansea
More about flat roof junction and flashing repairs · All roof lantern repairs in Swansea