In High Wycombe, 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
- Splits, blisters or lifted edges in the roof covering by the kerb
- 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.
Cracked GRP
Fibreglass roofs can crack at the kerb corner where movement concentrates.
Roof lanterns in High Wycombe
Leaf fall from garden trees is the most common cause of eaves overflow on suburban extensions. If your lantern sits near trees, clearing the eaves channel each autumn prevents a lot of drips.
From Aylesbury to High Wycombe is roughly 13 miles — all part of the Buckinghamshire area we cover.
Neighbouring places we cover include Amersham (6 miles), Maidenhead (7 miles), Chesham (8 miles).
Guide prices for flat roof junction and flashing repairs in High Wycombe
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 High Wycombe: questions
Do you cover High Wycombe?
Yes. We cover High Wycombe, including the HP13 postcode area, as part of Buckinghamshire. 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 High Wycombe do you cover?
As well as High Wycombe, we cover nearby Amersham, Maidenhead, Chesham, Chalfont St Peter and the rest of Buckinghamshire.
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 High Wycombe
- Glazing bar and capping repairs in High Wycombe
- Eaves beam and gutter repairs in High Wycombe
- Condensation diagnosis and fixes in High Wycombe
- uPVC roof lantern repairs in High Wycombe
- Cleaning and maintenance in High Wycombe
- Urgent leak make-safe in High Wycombe
Flat roof junction and flashing repairs near High Wycombe
More about flat roof junction and flashing repairs · All roof lantern repairs in High Wycombe