Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens. We carry out condensation diagnosis and fixes across Cambridgeshire, with a guide price from your photos and a fixed price in writing before any work starts.

Signs you need 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
What usually causes it?
High humidity
Cooking, kettles, showers, drying washing and people all add moisture to the air.
Cold surfaces
Older glass, uninsulated kerbs and un-thermally-broken frames stay cold and collect condensation.
Roof lanterns in Cambridgeshire
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.
What should you expect to pay for condensation diagnosis and fixes in Cambridgeshire?
Guide price for condensation diagnosis and fixes: £145–£495 ex VAT (£174–£594 inc 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?
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.
Condensation diagnosis and fixes in Cambridgeshire: questions
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.
Which towns in Cambridgeshire do you cover?
All of Cambridgeshire, including Cambridge, Peterborough, Wisbech, St Neots, Huntingdon, March. Rural and remote addresses are covered by arrangement.
How do I get a price for condensation diagnosis and fixes in Cambridgeshire?
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 Cambridgeshire
- Roof lantern leak repairs in Cambridgeshire
- Eaves beam and gutter repairs in Cambridgeshire
- Cracked lantern glass replacement in Cambridgeshire
- Slipped glass panel repairs in Cambridgeshire
- Roof lantern respraying in Cambridgeshire
- Leak investigation and inspection in Cambridgeshire
Nearby areas
- Condensation diagnosis and fixes in Rutland
- Condensation diagnosis and fixes in Northamptonshire
- Condensation diagnosis and fixes in Bedfordshire
- Condensation diagnosis and fixes in Suffolk
- Condensation diagnosis and fixes in Hertfordshire
More about condensation diagnosis and fixes · All roof lantern repairs in Cambridgeshire