The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Mitcham (CR4) and we'll tell you which it is — with the price agreed in writing before any work.
What you might be seeing
- 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
Common causes we find
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 Mitcham and the CR4 area
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.
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 Mitcham is roughly 7 miles — all part of the Greater London area we cover.
Neighbouring places we cover include Morden (1 mile), Wimbledon (2 miles), Streatham (2 miles).
How much should it cost?
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 Mitcham: questions
How do I get a price for flat roof junction and flashing repairs in Mitcham?
Send a few photos of the lantern and the problem, with your Mitcham 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 Mitcham do you cover?
As well as Mitcham, we cover nearby Morden, Wimbledon, Streatham, Carshalton 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 Mitcham
- Roof lantern leak repairs in Mitcham
- Glazing bar and capping repairs in Mitcham
- Upstand and kerb repairs in Mitcham
- Misted glass unit replacement in Mitcham
- Cleaning and maintenance in Mitcham
- Roof lantern replacement in Mitcham
Flat roof junction and flashing repairs near Mitcham
More about flat roof junction and flashing repairs · All roof lantern repairs in Mitcham