We carry out cracked lantern glass replacement in Belfast and across the BT1 area. A cracked pane in a roof lantern needs prompt attention because the glass is overhead.
What you might be seeing
- A visible crack in the outer or inner pane
- A starburst from an impact point
- A crack running from an edge (often thermal stress)
What usually causes it?
Impact
Hail, falling branches or dropped tools.
Thermal stress
Uneven heating across a pane, edge damage or partial shading can crack glass from the edge.
About Belfast and the BT1 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.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
We also cover nearby Newtownabbey (4 miles), Holywood (5 miles), Lisburn (7 miles).
How much should it cost?
Most cracked lantern glass replacement jobs come in between £295 and £795 ex VAT (£354–£954 including VAT), per glass unit. 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.
Cracked lantern glass replacement in Belfast: questions
How do I get a price for cracked lantern glass replacement in Belfast?
Send a few photos of the lantern and the problem, with your Belfast 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 Belfast do you cover?
As well as Belfast, we cover nearby Newtownabbey, Holywood, Lisburn, Newtownards and the rest of County Antrim.
What does replacing cracked lantern glass cost?
Usually £295–£795 ex VAT per unit depending on size, spec and access, confirmed in writing before work starts.
Why did my glass crack on a sunny day?
Thermal stress — one part of the pane heats faster than another, often where it's shaded or chipped at the edge.
Other lantern repairs in Belfast
- Roof lantern leak repairs in Belfast
- Aluminium roof lantern repairs in Belfast
- Opening vent and actuator repairs in Belfast
- Roof lantern respraying in Belfast
- Leak investigation and inspection in Belfast
- Orangery lantern repairs in Belfast
Cracked lantern glass replacement near Belfast
More about cracked lantern glass replacement · All roof lantern repairs in Belfast