If a roof lantern pane looks cloudy or wet between the two layers of glass, the sealed unit has failed and moisture has got inside. We carry out misted glass unit replacement across Ayrshire, with a guide price from your photos and a fixed price in writing before any work starts.

Signs you need misted glass unit replacement
- Fog, droplets or white bloom between the panes
- Misting that comes and goes with the weather
- Water marks or tide lines inside the unit
What usually causes it?
Water sitting on the edge
If the unit's edge sits in water because the eaves don't drain, the seal fails sooner.
Movement and age
Thermal movement and age wear the seal; units at the bottom of the lantern often go first.
Roof lanterns in Ayrshire
Western and upland parts of the UK get more rain and more wind-driven rain than the east, and that's what finds weak cappings and blocked eaves first. Lanterns here benefit from a check of the bars on the most exposed face and a clear eaves channel before winter.
Near the coast, salt in the air is hard on aluminium finishes and fixings; washing the frame occasionally and touching in chips keeps corrosion away.
What should you expect to pay for misted glass unit replacement in Ayrshire?
Guide price for misted glass unit replacement: £245–£595 ex VAT (£294–£714 inc 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 Scotland?
In Scotland, 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 (Scotland) Regulations 2004, so we set out the route in writing first. 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.
Misted glass unit replacement in Ayrshire: questions
How much does a misted lantern unit cost to replace?
Usually £245–£595 ex VAT per unit depending on size, glass spec and access, confirmed in writing before work starts.
How long does a replacement unit take?
Units are made to measure, so there's a lead time between measuring and fitting. Fitting itself is usually a short visit.
Which towns in Ayrshire do you cover?
All of Ayrshire, including Kilmarnock, Ayr, Irvine, Kilwinning, Largs, Prestwick. Rural and remote addresses are covered by arrangement.
How do I get a price for misted glass unit replacement in Ayrshire?
Send a few photos of the lantern and the problem with your postcode, by WhatsApp or the form. We reply with a guide price and confirm the fixed price in writing before any work starts.
Other repairs in Ayrshire
- Roof lantern leak repairs in Ayrshire
- Glazing bar and capping repairs in Ayrshire
- Flat roof junction and flashing repairs in Ayrshire
- Condensation diagnosis and fixes in Ayrshire
- Opening vent and actuator repairs in Ayrshire
- Orangery lantern repairs in Ayrshire
Nearby areas
- Misted glass unit replacement in Glasgow and Clyde
- Misted glass unit replacement in Lanarkshire
- Misted glass unit replacement in Argyll and Bute
- Misted glass unit replacement in Stirling and Falkirk
- Misted glass unit replacement in Dumfries and Galloway
More about misted glass unit replacement · All roof lantern repairs in Ayrshire