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 Lincolnshire, with a guide price from your photos and a fixed price in writing before any work starts.

Signs you need flat roof junction and flashing repairs
- Leak near the lantern but not from the frame
- Missing or loose edge trims and flashings
- Ponding on the roof next to the lantern
What usually causes it?
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 Lincolnshire
Drier, sunnier parts of the UK are kinder to seals than the wet west, but strong sun ages sealant, gaskets and plastic end caps, and south- or west-facing lanterns can make rooms very warm. Solar control glass and an opening vent help.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
What should you expect to pay for flat roof junction and flashing repairs in Lincolnshire?
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 Lincolnshire: questions
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.
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 Lincolnshire do you cover?
All of Lincolnshire, including Lincoln, Grimsby, Scunthorpe, Boston, Grantham, Cleethorpes. Rural and remote addresses are covered by arrangement.
How do I get a price for flat roof junction and flashing repairs in Lincolnshire?
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 Lincolnshire
- Eaves beam and gutter repairs in Lincolnshire
- Cracked lantern glass replacement in Lincolnshire
- Timber roof lantern repairs in Lincolnshire
- uPVC roof lantern repairs in Lincolnshire
- Opening vent and actuator repairs in Lincolnshire
- Urgent leak make-safe in Lincolnshire
Nearby areas
- Flat roof junction and flashing repairs in Nottinghamshire
- Flat roof junction and flashing repairs in Rutland
- Flat roof junction and flashing repairs in East Riding of Yorkshire
- Flat roof junction and flashing repairs in South Yorkshire
- Flat roof junction and flashing repairs in Derbyshire
More about flat roof junction and flashing repairs · All roof lantern repairs in Lincolnshire