The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Washington (NE37) and we'll tell you which it is — with the price agreed in writing before any work.

Signs you need 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
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.
About Washington and the NE37 area
Colder winters mean more frosty mornings, and a roof lantern is often the coldest surface in a warm kitchen — so condensation is as common as genuine leaks. We check which you've got before quoting.
Urban grime and traffic film dull glass and frames quickly; a clean and seal check makes a tired lantern look and perform much better.
From Newcastle upon Tyne to Washington is roughly 6 miles — all part of the Tyne and Wear area we cover.
Close by, we also cover Chester-le-Street (4 miles), Houghton-le-Spring (5 miles), Hebburn (5 miles).
Guide prices for flat roof junction and flashing repairs in Washington
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 Washington: questions
Do you need to visit to price flat roof junction and flashing repairs?
Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.
Which places near Washington do you cover?
As well as Washington, we cover nearby Chester-le-Street, Houghton-le-Spring, Hebburn, Sunderland and the rest of Tyne and Wear.
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 Washington
- Glazing bar and capping repairs in Washington
- Eaves beam and gutter repairs in Washington
- Condensation diagnosis and fixes in Washington
- Roof lantern respraying in Washington
- Urgent leak make-safe in Washington
- Orangery lantern repairs in Washington
Flat roof junction and flashing repairs near Washington
More about flat roof junction and flashing repairs · All roof lantern repairs in Washington