Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens. Send photos from Banstead (SM7) and we'll tell you which it is — with the price agreed in writing before any work.

Is it time for condensation diagnosis and fixes?
- Water on the inside of the glass on cold mornings, even without rain
- Drips after cooking, showers or drying clothes
- Wet window sills elsewhere in the house too
Common causes we find
High humidity
Cooking, kettles, showers, drying washing and people all add moisture to the air.
Poor ventilation
Without trickle vents, extraction or an opening vent, moist air has nowhere to go.
Covering Banstead and nearby
Sun and UV do more damage than rain on many lanterns here: brittle ridge caps, chalky finishes and hardened gaskets. They're cheap to replace before they let water in.
We cover Banstead as part of Surrey, about 17 miles from Guildford.
We also cover nearby Sutton (2 miles), Ewell (3 miles), Epsom (3 miles).
What should you expect to pay in Banstead?
Most condensation diagnosis and fixes jobs come in between £145 and £495 ex VAT (£174–£594 including VAT), per visit. 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.
Condensation diagnosis and fixes in Banstead: questions
How do I get a price for condensation diagnosis and fixes in Banstead?
Send a few photos of the lantern and the problem, with your Banstead 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 Banstead do you cover?
As well as Banstead, we cover nearby Sutton, Ewell, Epsom, Coulsdon and the rest of Surrey.
What does a condensation visit cost?
Diagnosis visits start from £145 ex VAT. Any fixes are priced separately and confirmed in writing before work starts.
Is condensation in a lantern normal?
Occasional light condensation on very cold mornings can be. Regular dripping isn't, and can damage linings and cause mould.
Other lantern repairs in Banstead
- Roof lantern resealing in Banstead
- Ridge and hip repairs in Banstead
- Slipped glass panel repairs in Banstead
- Timber roof lantern repairs in Banstead
- Flat rooflight and skylight repairs in Banstead
- Cleaning and maintenance in Banstead
Condensation diagnosis and fixes near Banstead
More about condensation diagnosis and fixes · All roof lantern repairs in Banstead