We carry out flat roof junction and flashing repairs in Canning Town and across the E16 area. The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions.

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
- Missing or loose edge trims and flashings
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 Canning Town and the E16 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.
London's extensions are often tight to neighbouring walls and roofs. Where a repair needs access over a neighbour's property, we'll tell you in advance so you can arrange it.
From Westminster to Canning Town is roughly 7 miles — all part of the Greater London area we cover.
Neighbouring places we cover include Stratford (2 miles), Bow (2 miles), Canary Wharf (2 miles).
How much should it cost?
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 Canning Town: questions
Do you cover Canning Town?
Yes. We cover Canning Town, including the E16 postcode area, as part of Greater London. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
Which places near Canning Town do you cover?
As well as Canning Town, we cover nearby Stratford, Bow, Canary Wharf, Greenwich and the rest of Greater London.
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 Canning Town
- Glazing bar and capping repairs in Canning Town
- Ridge and hip repairs in Canning Town
- Eaves beam and gutter repairs in Canning Town
- Cracked lantern glass replacement in Canning Town
- Slipped glass panel repairs in Canning Town
- Urgent leak make-safe in Canning Town
Flat roof junction and flashing repairs near Canning Town
More about flat roof junction and flashing repairs · All roof lantern repairs in Canning Town