The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Catford (SE6) and we'll tell you which it is — with the price agreed in writing before any work.

Is it time for flat roof junction and flashing repairs?
- Splits, blisters or lifted edges in the roof covering by the kerb
- Missing or loose edge trims and flashings
- Ponding on the roof next to the lantern
Why it happens
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.
About Catford and the SE6 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.
Across London, many lanterns sit on rear extensions with access only through the house, so we protect floors and plan the work to keep time indoors to a minimum. Parking and any permits are factored into the quote.
Catford is around 6 miles from Westminster, and both are within our Greater London coverage.
Neighbouring places we cover include Blackheath (2 miles), Greenwich (2 miles), Beckenham (3 miles).
What should you expect to pay in Catford?
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?
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 Catford: questions
How do I get a price for flat roof junction and flashing repairs in Catford?
Send a few photos of the lantern and the problem, with your Catford postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Which places near Catford do you cover?
As well as Catford, we cover nearby Blackheath, Greenwich, Beckenham, Peckham and the rest of Greater London.
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.
What does a junction repair cost?
Usually £245–£695 ex VAT, confirmed in writing before work starts.
Other lantern repairs in Catford
- Ridge and hip repairs in Catford
- Cracked lantern glass replacement in Catford
- Slipped glass panel repairs in Catford
- Aluminium roof lantern repairs in Catford
- Flat rooflight and skylight repairs in Catford
- Commercial roof lantern repairs in Catford
Flat roof junction and flashing repairs near Catford
More about flat roof junction and flashing repairs · All roof lantern repairs in Catford