We carry out flat roof junction and flashing repairs in Birmingham and across the B1 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
- Missing or loose edge trims and flashings
What usually causes it?
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.
Covering Birmingham and nearby
Lanterns in central England see a bit of everything — summer sun that ages seals and end caps, autumn leaf fall that blocks eaves, and frosty mornings that bring condensation. A yearly check covers all three.
In built-up areas, access is often the hardest part of the job — through the house, over a neighbour's roof, or with parking restrictions. We plan access in advance and price any tower or scaffold into the quote.
We also cover nearby Smethwick (3 miles), West Bromwich (5 miles), Shirley (6 miles).
Guide prices for flat roof junction and flashing repairs in Birmingham
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 Birmingham: questions
Do you cover Birmingham?
Yes. We cover Birmingham, including the B1 postcode area, as part of West Midlands. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
Which places near Birmingham do you cover?
As well as Birmingham, we cover nearby Smethwick, West Bromwich, Shirley, Halesowen and the rest of West Midlands.
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 Birmingham
- Roof lantern leak repairs in Birmingham
- Eaves beam and gutter repairs in Birmingham
- Cracked lantern glass replacement in Birmingham
- Condensation diagnosis and fixes in Birmingham
- Aluminium roof lantern repairs in Birmingham
- Opening vent and actuator repairs in Birmingham
Flat roof junction and flashing repairs near Birmingham
More about flat roof junction and flashing repairs · All roof lantern repairs in Birmingham