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. Send photos from Ewell (KT17) and we'll tell you which it is — with the price agreed in writing before any work.

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.
About Ewell and the KT17 area
Even in drier areas, one heavy downpour with blocked eaves is enough to overflow a lantern indoors. Clearing the eaves channel is the simplest prevention there is.
We cover Ewell as part of Surrey, about 16 miles from Guildford.
If you're just outside Ewell, we also cover Epsom (2 miles), Sutton (2 miles), Banstead (3 miles).
What should you expect to pay in Ewell?
Most misted glass unit replacement jobs come in between £245 and £595 ex VAT (£294–£714 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 England?
Most lantern repairs in England need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 apply and we confirm how the work will be signed off before we start. 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 Ewell: questions
Do you cover Ewell?
Yes. We cover Ewell, including the KT17 postcode area, as part of Surrey. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
Which places near Ewell do you cover?
As well as Ewell, we cover nearby Epsom, Sutton, Banstead, New Malden and the rest of Surrey.
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.
Will the new pane match the others?
We match tint and coatings as closely as possible; a new unit can look very slightly clearer than older neighbours.
Other lantern repairs in Ewell
- Ridge and hip repairs in Ewell
- Eaves beam and gutter repairs in Ewell
- Condensation diagnosis and fixes in Ewell
- Aluminium roof lantern repairs in Ewell
- Cleaning and maintenance in Ewell
- Commercial roof lantern repairs in Ewell
Misted glass unit replacement near Ewell
More about misted glass unit replacement · All roof lantern repairs in Ewell