We carry out flat roof junction and flashing repairs in Gosport and across the PO12 area. The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions.

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
- Ponding on the roof next to the lantern
Common causes we find
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 Gosport
Even in drier areas, one heavy downpour with blocked eaves is enough to overflow a lantern indoors. Clearing the eaves channel is the simplest prevention there is.
From Southampton to Gosport is roughly 14 miles — all part of the Hampshire area we cover.
If you're just outside Gosport, we also cover Portsmouth (2 miles), Fareham (4 miles), Ryde (5 miles).
What should you expect to pay in Gosport?
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?
In England, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010, so we set out the route in writing first. 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 Gosport: questions
How do I get a price for flat roof junction and flashing repairs in Gosport?
Send a few photos of the lantern and the problem, with your Gosport 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 Gosport do you cover?
As well as Gosport, we cover nearby Portsmouth, Fareham, Ryde, Waterlooville and the rest of Hampshire.
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 Gosport
- Roof lantern resealing in Gosport
- Aluminium roof lantern repairs in Gosport
- Roof lantern respraying in Gosport
- Leak investigation and inspection in Gosport
- Urgent leak make-safe in Gosport
- Orangery lantern repairs in Gosport
Flat roof junction and flashing repairs near Gosport
More about flat roof junction and flashing repairs · All roof lantern repairs in Gosport