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 Cumbria, 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
- Black mould at the base of the lantern lining
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 Cumbria
Western and upland parts of the UK get more rain and more wind-driven rain than the east, and that's what finds weak cappings and blocked eaves first. Lanterns here benefit from a check of the bars on the most exposed face and a clear eaves channel before winter.
What should you expect to pay for condensation diagnosis and fixes in Cumbria?
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 Cumbria: questions
Will new glass stop condensation?
Better glass raises the inner surface temperature and helps, but if the room is very humid, ventilation matters more. We'll tell you which will make the bigger difference.
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.
Which towns in Cumbria do you cover?
All of Cumbria, including Carlisle, Barrow-in-Furness, Kendal, Whitehaven, Workington, Penrith. Rural and remote addresses are covered by arrangement.
How do I get a price for condensation diagnosis and fixes in Cumbria?
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 Cumbria
- Roof lantern resealing in Cumbria
- Glazing bar and capping repairs in Cumbria
- Eaves beam and gutter repairs in Cumbria
- Opening vent and actuator repairs in Cumbria
- Flat rooflight and skylight repairs in Cumbria
- Cleaning and maintenance in Cumbria
Nearby areas
- Condensation diagnosis and fixes in Lancashire
- Condensation diagnosis and fixes in County Durham
- Condensation diagnosis and fixes in Northumberland
- Condensation diagnosis and fixes in Tyne and Wear
- Condensation diagnosis and fixes in Merseyside
More about condensation diagnosis and fixes · All roof lantern repairs in Cumbria