We carry out flat roof junction and flashing repairs in Thornaby-on-Tees and across the TS17 area. The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions.

Is it time for flat roof junction and flashing repairs?
- Leak near the lantern but not from the frame
- Missing or loose edge trims and flashings
- 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.
Missing trims
Without a trim or flashing to protect the top edge, water gets in behind the membrane.
Covering Thornaby-on-Tees and nearby
Snow and ice sitting at the eaves can block a lantern's drainage and push water back under the glass as it melts. If your lantern leaks after a thaw rather than after rain, tell us — it points to the eaves and kerb.
We also cover nearby Stockton-on-Tees (3 miles), Billingham (4 miles), Middlesbrough (4 miles).
What should you expect to pay in Thornaby-on-Tees?
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 Thornaby-on-Tees: questions
Do you cover Thornaby-on-Tees?
Yes. We cover Thornaby-on-Tees, including the TS17 postcode area, as part of North Yorkshire. 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.
Can you repair a lantern someone else installed in Thornaby-on-Tees?
Yes. We repair lanterns whoever fitted them. If yours is still under the installer's warranty, contact them first so you don't affect it.
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 Thornaby-on-Tees
- Eaves beam and gutter repairs in Thornaby-on-Tees
- Upstand and kerb repairs in Thornaby-on-Tees
- Aluminium roof lantern repairs in Thornaby-on-Tees
- Roof lantern respraying in Thornaby-on-Tees
- Urgent leak make-safe in Thornaby-on-Tees
- Roof lantern replacement in Thornaby-on-Tees
Flat roof junction and flashing repairs near Thornaby-on-Tees
More about flat roof junction and flashing repairs · All roof lantern repairs in Thornaby-on-Tees