In Blackwood, 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
- 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
Why it happens
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.
About Blackwood and the NP12 area
Damp, mild winters keep moss and algae growing on flat roofs and lantern frames, which holds water against seals and blocks weep slots. Regular clearing makes a real difference in wetter areas.
From Newport, Gwent to Blackwood is roughly 11 miles — all part of the Gwent area we cover.
Close by, we also cover Risca (6 miles), Caerphilly (6 miles), Pontypridd (7 miles).
Guide prices for flat roof junction and flashing repairs in Blackwood
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 Wales?
In Wales, 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 (as applied in Wales), so we set out the route in writing first. Listed buildings in Wales need listed building consent from the local planning authority for alterations, with Cadw guidance on historic buildings; check with the council before changing a lantern on a listed property.
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 Blackwood: questions
Do you cover Blackwood?
Yes. We cover Blackwood, including the NP12 postcode area, as part of Gwent. 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 Blackwood do you cover?
As well as Blackwood, we cover nearby Risca, Caerphilly, Pontypridd, Pontypool and the rest of Gwent.
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 Blackwood
- Roof lantern leak repairs in Blackwood
- Eaves beam and gutter repairs in Blackwood
- Upstand and kerb repairs in Blackwood
- Cracked lantern glass replacement in Blackwood
- Roof lantern respraying in Blackwood
- Cleaning and maintenance in Blackwood
Flat roof junction and flashing repairs near Blackwood
More about flat roof junction and flashing repairs · All roof lantern repairs in Blackwood