Flat roof junction and flashing repairs in West Glamorgan

The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. We carry out flat roof junction and flashing repairs across West Glamorgan, with a guide price from your photos and a fixed price in writing before any work starts.

Newly trimmed flat roof junction and flashing tape around a roof lantern kerb

Signs you need 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

What usually causes it?

Unbonded membrane

EPDM or single-ply that has come away from the kerb lets water run behind it.

Missing trims

Without a trim or flashing to protect the top edge, water gets in behind the membrane.

Roof lanterns in West Glamorgan

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.

What should you expect to pay for flat roof junction and flashing repairs in West Glamorgan?

Guide price, per lantern£245–£695 ex VAT£294–£834 inc VAT

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?

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 West Glamorgan: questions

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.

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 flat roof junction and flashing 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.

Other repairs in West Glamorgan

Nearby areas

More about flat roof junction and flashing repairs · All roof lantern repairs in West Glamorgan