The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. We carry out flat roof junction and flashing repairs across Oxfordshire, with a guide price from your photos and a fixed price in writing before any work starts.

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
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 Oxfordshire
Most inland lantern leaks aren't storm damage; they're usually tired sealant, a lifted capping or blocked eaves drainage. All three are quick to find and fix once you know where to look.
What should you expect to pay for flat roof junction and flashing repairs in Oxfordshire?
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 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 Oxfordshire: questions
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.
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.
Which towns in Oxfordshire do you cover?
All of Oxfordshire, including Oxford, Banbury, Abingdon, Bicester, Didcot, Witney. Rural and remote addresses are covered by arrangement.
How do I get a price for flat roof junction and flashing repairs in Oxfordshire?
Send a few photos of the lantern and the problem with your postcode, by WhatsApp or the form. We reply with a guide price and confirm the fixed price in writing before any work starts.
Other repairs in Oxfordshire
- Roof lantern leak repairs in Oxfordshire
- Ridge and hip repairs in Oxfordshire
- Misted glass unit replacement in Oxfordshire
- Slipped glass panel repairs in Oxfordshire
- Solar control and self-cleaning glass upgrades in Oxfordshire
- Roof lantern respraying in Oxfordshire
Nearby areas
- Flat roof junction and flashing repairs in Buckinghamshire
- Flat roof junction and flashing repairs in Berkshire
- Flat roof junction and flashing repairs in Bedfordshire
- Flat roof junction and flashing repairs in Gloucestershire
- Flat roof junction and flashing repairs in Warwickshire
More about flat roof junction and flashing repairs · All roof lantern repairs in Oxfordshire