We carry out ridge and hip repairs in Derry~Londonderry and across the BT47 area. 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.
What you might be seeing
- Drips near the centre or top of the lantern
- A cracked or faded ridge end cap
- Staining along the hip bars inside
Common causes we find
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.
Roof lanterns in Derry~Londonderry
Wind-driven rain is the real test of a roof lantern, and the wetter west sees plenty of it. Leaks that appear only in a storm from one direction usually point to the cappings or eaves on that face — a useful clue when you send us photos.
We also cover nearby Strabane (14 miles), Limavady (15 miles), Portstewart (27 miles).
What should you expect to pay in Derry~Londonderry?
Typical range: £195–£445 ex VAT, which is £234–£534 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 Northern Ireland?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in Northern Ireland. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations (Northern Ireland) 2012; we confirm in writing which route applies before any replacement. Listed buildings in Northern Ireland need listed building consent from the council for alterations; check with the council's planning service 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 Derry~Londonderry: questions
How do I get a price for ridge and hip repairs in Derry~Londonderry?
Send a few photos of the lantern and the problem, with your Derry~Londonderry postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Which places near Derry~Londonderry do you cover?
As well as Derry~Londonderry, we cover nearby Strabane, Limavady, Portstewart, Coleraine and the rest of County Londonderry.
What does a ridge repair cost?
Usually £195–£445 ex VAT for a standard lantern, confirmed in writing before work starts.
Can you replace just the ridge cap?
Yes, if a compatible cap is available and the seals underneath are sound.
Other lantern repairs in Derry~Londonderry
- Upstand and kerb repairs in Derry~Londonderry
- Flat roof junction and flashing repairs in Derry~Londonderry
- Slipped glass panel repairs in Derry~Londonderry
- Opening vent and actuator repairs in Derry~Londonderry
- Cleaning and maintenance in Derry~Londonderry
- Orangery lantern repairs in Derry~Londonderry
Ridge and hip repairs near Derry~Londonderry
More about ridge and hip repairs · All roof lantern repairs in Derry~Londonderry