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 County Durham, 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 County Durham
Freeze-thaw cycles open up tired sealant and gaskets faster than mild weather does. A spring check after a hard winter catches most problems before they leak.
- Durham
- Darlington
- Hartlepool
- Stockton-on-Tees
- Chester-le-Street
- Billingham
- Stanley
- Consett
- Newton Aycliffe
- Bishop Auckland
- Seaham
- Peterlee
What should you expect to pay for misted glass unit replacement in County Durham?
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?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. 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 County Durham: 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 County Durham do you cover?
All of County Durham, including Durham, Darlington, Hartlepool, Stockton-on-Tees, Chester-le-Street, Billingham. Rural and remote addresses are covered by arrangement.
How do I get a price for misted glass unit replacement in County Durham?
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 County Durham
- Eaves beam and gutter repairs in County Durham
- Upstand and kerb repairs in County Durham
- Timber roof lantern repairs in County Durham
- uPVC roof lantern repairs in County Durham
- Roof lantern respraying in County Durham
- Leak investigation and inspection in County Durham
Nearby areas
- Misted glass unit replacement in Tyne and Wear
- Misted glass unit replacement in Northumberland
- Misted glass unit replacement in North Yorkshire
- Misted glass unit replacement in Cumbria
- Misted glass unit replacement in West Yorkshire
More about misted glass unit replacement · All roof lantern repairs in County Durham