In Dumbarton, as everywhere, the ridge is where the hip bars and glazing bars meet at the top of a lantern, usually under a moulded or pressed end cap. Send photos and we'll tell you what we think has failed.

Is it time for ridge and hip repairs?
- A cracked or faded ridge end cap
- Sealant around the ridge cap split or missing
- Staining along the hip bars inside
What usually causes it?
Movement at the junction
Several bars meet at one point and each moves slightly with temperature; the seals at the ridge take the strain.
Poor original sealing
Ridge details are fiddly. If the original sealing was rushed, it's often the first place to leak.
About Dumbarton and the G82 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.
Urban grime and traffic film dull glass and frames quickly; a clean and seal check makes a tired lantern look and perform much better.
From Glasgow to Dumbarton is roughly 13 miles — all part of the Glasgow and Clyde area we cover.
Neighbouring places we cover include Clydebank (7 miles), Greenock (7 miles), Helensburgh (7 miles).
Guide prices for ridge and hip repairs in Dumbarton
Most ridge and hip repairs jobs come in between £195 and £445 ex VAT (£234–£534 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 Scotland?
Most lantern repairs in Scotland need no approval at all. Where a job turns into a replacement, the Building (Scotland) Regulations 2004 apply and we confirm how the work will be signed off before we start. Listed buildings in Scotland need listed building consent from the planning authority for alterations, with Historic Environment Scotland guidance; check 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.
Ridge and hip repairs in Dumbarton: questions
Can you repair a lantern someone else installed in Dumbarton?
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 Dumbarton do you cover?
As well as Dumbarton, we cover nearby Clydebank, Greenock, Helensburgh, Johnstone and the rest of Glasgow and Clyde.
My ridge cap is a different colour from the frame — does that matter?
Faded or chalky caps are a sign of UV damage. Colour alone isn't a leak, but brittle caps crack, so we check them.
Can you replace just the ridge cap?
Yes, if a compatible cap is available and the seals underneath are sound.
Other lantern repairs in Dumbarton
- Roof lantern resealing in Dumbarton
- Misted glass unit replacement in Dumbarton
- Cracked lantern glass replacement in Dumbarton
- uPVC roof lantern repairs in Dumbarton
- Cleaning and maintenance in Dumbarton
- Orangery lantern repairs in Dumbarton
Ridge and hip repairs near Dumbarton
More about ridge and hip repairs · All roof lantern repairs in Dumbarton