The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. We carry out flat roof junction and flashing repairs across Dorset, with a guide price from your photos and a fixed price in writing before any work starts.
Signs you need flat roof junction and flashing repairs
- Leak near the lantern but not from the frame
- Missing or loose edge trims and flashings
- Ponding on the roof next to the lantern
What usually causes it?
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.
Roof lanterns in Dorset
Even in drier areas, one heavy downpour with blocked eaves is enough to overflow a lantern indoors. Clearing the eaves channel is the simplest prevention there is.
Near the coast, salt in the air is hard on aluminium finishes and fixings; washing the frame occasionally and touching in chips keeps corrosion away.
What should you expect to pay for flat roof junction and flashing repairs in Dorset?
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 Dorset: questions
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.
Which towns in Dorset do you cover?
All of Dorset, including Bournemouth, Poole, Weymouth, Christchurch. Rural and remote addresses are covered by arrangement.
How do I get a price for flat roof junction and flashing repairs in Dorset?
Send a few photos of the lantern and the problem with your postcode, by WhatsApp or the form. We reply with a guide price and confirm the fixed price in writing before any work starts.
Other repairs in Dorset
- Roof lantern leak repairs in Dorset
- Eaves beam and gutter repairs in Dorset
- Misted glass unit replacement in Dorset
- Slipped glass panel repairs in Dorset
- Opening vent and actuator repairs in Dorset
- Orangery lantern repairs in Dorset
Nearby areas
- Flat roof junction and flashing repairs in Isle of Wight
- Flat roof junction and flashing repairs in Hampshire
- Flat roof junction and flashing repairs in Wiltshire
- Flat roof junction and flashing repairs in Somerset
- Flat roof junction and flashing repairs in Bristol
More about flat roof junction and flashing repairs · All roof lantern repairs in Dorset