We carry out misted glass unit replacement in Thornaby-on-Tees and across the TS17 area. 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.

What you might be seeing
- Fog, droplets or white bloom between the panes
- One pane looks hazier than the others
- Misting that comes and goes with the weather
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 Thornaby-on-Tees
Snow and ice sitting at the eaves can block a lantern's drainage and push water back under the glass as it melts. If your lantern leaks after a thaw rather than after rain, tell us — it points to the eaves and kerb.
If you're just outside Thornaby-on-Tees, we also cover Stockton-on-Tees (3 miles), Billingham (4 miles), Middlesbrough (4 miles).
Guide prices for misted glass unit replacement in Thornaby-on-Tees
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 England?
In England, 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, so we set out the route in writing first. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.
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 Thornaby-on-Tees: questions
How do I get a price for misted glass unit replacement in Thornaby-on-Tees?
Send a few photos of the lantern and the problem, with your Thornaby-on-Tees postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Do you need to visit to price misted glass unit replacement?
Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.
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.
Other lantern repairs in Thornaby-on-Tees
- Roof lantern resealing in Thornaby-on-Tees
- Glazing bar and capping repairs in Thornaby-on-Tees
- Flat roof junction and flashing repairs in Thornaby-on-Tees
- Solar control and self-cleaning glass upgrades in Thornaby-on-Tees
- Roof lantern replacement in Thornaby-on-Tees
- Commercial roof lantern repairs in Thornaby-on-Tees
Misted glass unit replacement near Thornaby-on-Tees
More about misted glass unit replacement · All roof lantern repairs in Thornaby-on-Tees