In Potters Bar, as everywhere, the junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos and we'll tell you what we think has failed.
What you might be seeing
- Leak near the lantern but not from the frame
- Missing or loose edge trims and flashings
- Ponding on the roof next to the lantern
Why it happens
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 Potters Bar 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.
We cover Potters Bar as part of Hertfordshire, about 8 miles from St Albans.
If you're just outside Potters Bar, we also cover Barnet (3 miles), Enfield (5 miles), Borehamwood (5 miles).
What should you expect to pay in Potters Bar?
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?
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 Potters Bar: questions
How do I get a price for flat roof junction and flashing repairs in Potters Bar?
Send a few photos of the lantern and the problem, with your Potters Bar 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 Potters Bar do you cover?
As well as Potters Bar, we cover nearby Barnet, Enfield, Borehamwood, Hatfield and the rest of Hertfordshire.
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 Potters Bar
- Ridge and hip repairs in Potters Bar
- Upstand and kerb repairs in Potters Bar
- Misted glass unit replacement in Potters Bar
- Slipped glass panel repairs in Potters Bar
- Roof lantern respraying in Potters Bar
- Orangery lantern repairs in Potters Bar
Flat roof junction and flashing repairs near Potters Bar
More about flat roof junction and flashing repairs · All roof lantern repairs in Potters Bar