The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Whitstable (CT5) and we'll tell you which it is — with the price agreed in writing before any work.

What you might be seeing
- Leak near the lantern but not from the frame
- Splits, blisters or lifted edges in the roof covering by the kerb
- Missing or loose edge trims and flashings
Common causes we find
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.
Roof lanterns in Whitstable
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.
Near the coast, salt in the air is hard on aluminium finishes and fixings; washing the frame occasionally and touching in chips keeps corrosion away.
We cover Whitstable as part of Kent, about 23 miles from Maidstone.
We also cover nearby Herne Bay (5 miles), Canterbury (6 miles), Faversham (7 miles).
Guide prices for flat roof junction and flashing repairs in Whitstable
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 England?
Most lantern repairs in England need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 apply and we confirm how the work will be signed off before we start. 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 Whitstable: questions
How do I get a price for flat roof junction and flashing repairs in Whitstable?
Send a few photos of the lantern and the problem, with your Whitstable 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 Whitstable?
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.
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 Whitstable
- Glazing bar and capping repairs in Whitstable
- Cracked lantern glass replacement in Whitstable
- Flat rooflight and skylight repairs in Whitstable
- Urgent leak make-safe in Whitstable
- Orangery lantern repairs in Whitstable
- Commercial roof lantern repairs in Whitstable
Flat roof junction and flashing repairs near Whitstable
More about flat roof junction and flashing repairs · All roof lantern repairs in Whitstable