The junction where the flat roof covering meets the lantern kerb is a weak point on many extensions. Send photos from Weymouth (DT4) 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
- 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.
Covering Weymouth and nearby
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.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
We cover Weymouth as part of Dorset, about 26 miles from Bournemouth.
We also cover nearby Poole (22 miles), Yeovil (24 miles), Bournemouth (26 miles).
Guide prices for flat roof junction and flashing repairs in Weymouth
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?
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 Weymouth: questions
Can you repair a lantern someone else installed in Weymouth?
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 Weymouth do you cover?
As well as Weymouth, we cover nearby Poole, Yeovil, Bournemouth, Christchurch and the rest of Dorset.
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.
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 Weymouth
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- Ridge and hip repairs in Weymouth
- Cracked lantern glass replacement in Weymouth
- Solar control and self-cleaning glass upgrades in Weymouth
- Flat rooflight and skylight repairs in Weymouth
- Roof lantern replacement in Weymouth
Flat roof junction and flashing repairs near Weymouth
More about flat roof junction and flashing repairs · All roof lantern repairs in Weymouth