In Ashford, Surrey, 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
- 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 Ashford, Surrey
Sun and UV do more damage than rain on many lanterns here: brittle ridge caps, chalky finishes and hardened gaskets. They're cheap to replace before they let water in.
From Guildford to Ashford, Surrey is roughly 14 miles — all part of the Surrey area we cover.
If you're just outside Ashford, Surrey, we also cover Staines (2 miles), Feltham (2 miles), Sunbury-on-Thames (3 miles).
How much should it cost?
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 Ashford, Surrey: questions
Do you need to visit to price flat roof junction and flashing repairs?
Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.
Which places near Ashford, Surrey do you cover?
As well as Ashford, Surrey, we cover nearby Staines, Feltham, Sunbury-on-Thames, Hanworth and the rest of Surrey.
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 Ashford, Surrey
- Glazing bar and capping repairs in Ashford, Surrey
- Timber roof lantern repairs in Ashford, Surrey
- Aluminium roof lantern repairs in Ashford, Surrey
- Roof lantern replacement in Ashford, Surrey
- Orangery lantern repairs in Ashford, Surrey
- Commercial roof lantern repairs in Ashford, Surrey
Flat roof junction and flashing repairs near Ashford, Surrey
More about flat roof junction and flashing repairs · All roof lantern repairs in Ashford, Surrey