The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Nailsea (BS48) and we'll tell you which it is — with the price agreed in writing before any work.
What you might be seeing
- 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
What usually causes it?
Unbonded membrane
EPDM or single-ply that has come away from the kerb lets water run behind it.
Cracked GRP
Fibreglass roofs can crack at the kerb corner where movement concentrates.
Roof lanterns in Nailsea
Damp, mild winters keep moss and algae growing on flat roofs and lantern frames, which holds water against seals and blocks weep slots. Regular clearing makes a real difference in wetter areas.
From Taunton to Nailsea is roughly 32 miles — all part of the Somerset area we cover.
Neighbouring places we cover include Portishead (3 miles), Clevedon (4 miles), Bristol (7 miles).
Guide prices for flat roof junction and flashing repairs in Nailsea
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 Nailsea: questions
How do I get a price for flat roof junction and flashing repairs in Nailsea?
Send a few photos of the lantern and the problem, with your Nailsea 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 Nailsea do you cover?
As well as Nailsea, we cover nearby Portishead, Clevedon, Bristol, Weston-super-Mare and the rest of Somerset.
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 Nailsea
- Upstand and kerb repairs in Nailsea
- Cracked lantern glass replacement in Nailsea
- uPVC roof lantern repairs in Nailsea
- Roof lantern replacement in Nailsea
- Orangery lantern repairs in Nailsea
- Commercial roof lantern repairs in Nailsea
Flat roof junction and flashing repairs near Nailsea
More about flat roof junction and flashing repairs · All roof lantern repairs in Nailsea