In Antrim, as everywhere, the junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos and we'll tell you what we think has failed.

Signs you need flat roof junction and flashing repairs
- 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
Common causes we find
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 Antrim
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.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
We cover Antrim as part of County Antrim, about 13 miles from Belfast.
Close by, we also cover Ballymena (12 miles), Newtownabbey (12 miles), Belfast (13 miles).
What should you expect to pay in Antrim?
Guide price for flat roof junction and flashing repairs: £245–£695 ex VAT (£294–£834 inc 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 Northern Ireland?
Most lantern repairs in Northern Ireland need no approval at all. Where a job turns into a replacement, the Building Regulations (Northern Ireland) 2012 apply and we confirm how the work will be signed off before we start. Listed buildings in Northern Ireland need listed building consent from the council for alterations; check with the council's planning service before changing a lantern on a listed property.
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 Antrim: questions
How do I get a price for flat roof junction and flashing repairs in Antrim?
Send a few photos of the lantern and the problem, with your Antrim 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 Antrim do you cover?
As well as Antrim, we cover nearby Ballymena, Newtownabbey, Belfast, Lisburn and the rest of County Antrim.
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 Antrim
- Roof lantern leak repairs in Antrim
- Ridge and hip repairs in Antrim
- Aluminium roof lantern repairs in Antrim
- uPVC roof lantern repairs in Antrim
- Roof lantern respraying in Antrim
- Orangery lantern repairs in Antrim
Flat roof junction and flashing repairs near Antrim
More about flat roof junction and flashing repairs · All roof lantern repairs in Antrim