We carry out flat roof junction and flashing repairs in Muswell Hill and across the N10 area. The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions.
What you might be seeing
- 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
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.
Roof lanterns in Muswell Hill
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.
We cover Muswell Hill as part of Greater London, about 6 miles from Westminster.
If you're just outside Muswell Hill, we also cover Wood Green (1 mile), Archway (2 miles), Finchley (2 miles).
Guide prices for flat roof junction and flashing repairs in Muswell Hill
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?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. 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 Muswell Hill: questions
How do I get a price for flat roof junction and flashing repairs in Muswell Hill?
Send a few photos of the lantern and the problem, with your Muswell Hill 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 Muswell Hill do you cover?
As well as Muswell Hill, we cover nearby Wood Green, Archway, Finchley, Holloway 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 Muswell Hill
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- Aluminium roof lantern repairs in Muswell Hill
- uPVC roof lantern repairs in Muswell Hill
- Roof lantern respraying in Muswell Hill
- Roof lantern replacement in Muswell Hill
- Orangery lantern repairs in Muswell Hill
Flat roof junction and flashing repairs near Muswell Hill
More about flat roof junction and flashing repairs · All roof lantern repairs in Muswell Hill