The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Chippenham (SN15) and we'll tell you which it is — with the price agreed in writing before any work.

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
What usually causes it?
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.
Covering Chippenham and nearby
Most inland lantern leaks aren't storm damage; they're usually tired sealant, a lifted capping or blocked eaves drainage. All three are quick to find and fix once you know where to look.
Chippenham is around 16 miles from Swindon, and both are within our Wiltshire coverage.
Close by, we also cover Trowbridge (10 miles), Bath (12 miles), Yate (14 miles).
How much should it cost?
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 England?
In England, 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, so we set out the route in writing first. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.
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 Chippenham: questions
How do I get a price for flat roof junction and flashing repairs in Chippenham?
Send a few photos of the lantern and the problem, with your Chippenham postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Can you repair a lantern someone else installed in Chippenham?
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.
Do you repair the whole flat roof?
We repair the area around the lantern. If the wider roof is failing we'll tell you and can quote, but we won't push a new roof if a local repair will do.
What does a junction repair cost?
Usually £245–£695 ex VAT, confirmed in writing before work starts.
Other lantern repairs in Chippenham
- Roof lantern resealing in Chippenham
- Glazing bar and capping repairs in Chippenham
- Upstand and kerb repairs in Chippenham
- Flat rooflight and skylight repairs in Chippenham
- Cleaning and maintenance in Chippenham
- Commercial roof lantern repairs in Chippenham
Flat roof junction and flashing repairs near Chippenham
More about flat roof junction and flashing repairs · All roof lantern repairs in Chippenham