The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Prescot (L34) and we'll tell you which it is — with the price agreed in writing before any work.

Is it time for 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
- Ponding on the roof next to the lantern
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 Prescot
Wind-driven rain is the real test of a roof lantern, and the wetter west sees plenty of it. Leaks that appear only in a storm from one direction usually point to the cappings or eaves on that face — a useful clue when you send us photos.
Urban grime and traffic film dull glass and frames quickly; a clean and seal check makes a tired lantern look and perform much better.
Near the coast, salt in the air is hard on aluminium finishes and fixings; washing the frame occasionally and touching in chips keeps corrosion away.
We cover Prescot as part of Merseyside, about 7 miles from Liverpool.
If you're just outside Prescot, we also cover Huyton (2 miles), St Helens (3 miles), Halewood (5 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 Prescot: questions
How do I get a price for flat roof junction and flashing repairs in Prescot?
Send a few photos of the lantern and the problem, with your Prescot 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 Prescot do you cover?
As well as Prescot, we cover nearby Huyton, St Helens, Halewood, Kirkby and the rest of Merseyside.
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 Prescot
- Glazing bar and capping repairs in Prescot
- Condensation diagnosis and fixes in Prescot
- Timber roof lantern repairs in Prescot
- Roof lantern respraying in Prescot
- Cleaning and maintenance in Prescot
- Commercial roof lantern repairs in Prescot
Flat roof junction and flashing repairs near Prescot
More about flat roof junction and flashing repairs · All roof lantern repairs in Prescot