In Grantham, 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?
- Leak near the lantern but not from the frame
- Splits, blisters or lifted edges in the roof covering by the kerb
- 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.
Missing trims
Without a trim or flashing to protect the top edge, water gets in behind the membrane.
About Grantham and the NG31 area
Sun and UV do more damage than rain on many lanterns here: brittle ridge caps, chalky finishes and hardened gaskets. They're cheap to replace before they let water in.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
From Lincoln to Grantham is roughly 22 miles — all part of the Lincolnshire area we cover.
Neighbouring places we cover include Newark-on-Trent (13 miles), Melton Mowbray (14 miles), Oakham (17 miles).
Guide prices for flat roof junction and flashing repairs in Grantham
Guide price for flat roof junction and flashing repairs: £245–£695 ex VAT (£294–£834 inc 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 Grantham: questions
Can you repair a lantern someone else installed in Grantham?
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.
Which places near Grantham do you cover?
As well as Grantham, we cover nearby Newark-on-Trent, Melton Mowbray, Oakham, Stamford and the rest of Lincolnshire.
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 Grantham
- Roof lantern leak repairs in Grantham
- Glazing bar and capping repairs in Grantham
- Misted glass unit replacement in Grantham
- Solar control and self-cleaning glass upgrades in Grantham
- Timber roof lantern repairs in Grantham
- Leak investigation and inspection in Grantham
Flat roof junction and flashing repairs near Grantham
More about flat roof junction and flashing repairs · All roof lantern repairs in Grantham