In Harpenden, 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.
Is it time for flat roof junction and flashing repairs?
- 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
Why it happens
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 Harpenden
Most inland lantern leaks aren't storm damage; they're usually tired sealant, a lifted capping or blocked eaves drainage. All three are quick to find and fix once you know where to look.
We cover Harpenden as part of Hertfordshire, about 5 miles from St Albans.
Close by, we also cover St Albans (5 miles), Luton (5 miles), Hemel Hempstead (6 miles).
Guide prices for flat roof junction and flashing repairs in Harpenden
Most flat roof junction and flashing repairs jobs come in between £245 and £695 ex VAT (£294–£834 including 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 Harpenden: questions
Can you repair a lantern someone else installed in Harpenden?
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.
Which places near Harpenden do you cover?
As well as Harpenden, we cover nearby St Albans, Luton, Hemel Hempstead, Welwyn Garden City and the rest of Hertfordshire.
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 Harpenden
- Roof lantern resealing in Harpenden
- Glazing bar and capping repairs in Harpenden
- Cracked lantern glass replacement in Harpenden
- Slipped glass panel repairs in Harpenden
- Timber roof lantern repairs in Harpenden
- Commercial roof lantern repairs in Harpenden
Flat roof junction and flashing repairs near Harpenden
More about flat roof junction and flashing repairs · All roof lantern repairs in Harpenden