The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Hemel Hempstead (HP3) and we'll tell you which it is — with the price agreed in writing before any work.
Signs you need flat roof junction and flashing repairs
- 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
Common causes we find
Cracked GRP
Fibreglass roofs can crack at the kerb corner where movement concentrates.
Missing trims
Without a trim or flashing to protect the top edge, water gets in behind the membrane.
Covering Hemel Hempstead and nearby
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 St Albans to Hemel Hempstead is roughly 5 miles — all part of the Hertfordshire area we cover.
Close by, we also cover Berkhamsted (5 miles), St Albans (5 miles), Harpenden (6 miles).
Guide prices for flat roof junction and flashing repairs in Hemel Hempstead
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?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. 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 Hemel Hempstead: questions
How do I get a price for flat roof junction and flashing repairs in Hemel Hempstead?
Send a few photos of the lantern and the problem, with your Hemel Hempstead postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Can you repair a lantern someone else installed in Hemel Hempstead?
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 Hemel Hempstead
- Upstand and kerb repairs in Hemel Hempstead
- Condensation diagnosis and fixes in Hemel Hempstead
- Timber roof lantern repairs in Hemel Hempstead
- Roof lantern replacement in Hemel Hempstead
- Orangery lantern repairs in Hemel Hempstead
- Commercial roof lantern repairs in Hemel Hempstead
Flat roof junction and flashing repairs near Hemel Hempstead
More about flat roof junction and flashing repairs · All roof lantern repairs in Hemel Hempstead