We carry out flat roof junction and flashing repairs in Carshalton and across the SM5 area. The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions.
Signs you need flat roof junction and flashing repairs
- Leak near the lantern but not from the frame
- Missing or loose edge trims and flashings
- 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 Carshalton and the SM5 area
Even in drier areas, one heavy downpour with blocked eaves is enough to overflow a lantern indoors. Clearing the eaves channel is the simplest prevention there is.
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.
We cover Carshalton as part of Greater London, about 9 miles from Westminster.
Close by, we also cover Wallington (1 mile), Sutton (2 miles), Mitcham (2 miles).
Guide prices for flat roof junction and flashing repairs in Carshalton
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 Carshalton: questions
How do I get a price for flat roof junction and flashing repairs in Carshalton?
Send a few photos of the lantern and the problem, with your Carshalton 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 Carshalton do you cover?
As well as Carshalton, we cover nearby Wallington, Sutton, Mitcham, Morden 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 Carshalton
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- Roof lantern replacement in Carshalton
Flat roof junction and flashing repairs near Carshalton
More about flat roof junction and flashing repairs · All roof lantern repairs in Carshalton