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 Berkshire, 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.
Poor ventilation
Without trickle vents, extraction or an opening vent, moist air has nowhere to go.
Roof lanterns in Berkshire
Leaf fall from garden trees is the most common cause of eaves overflow on suburban extensions. If your lantern sits near trees, clearing the eaves channel each autumn prevents a lot of drips.
What should you expect to pay for condensation diagnosis and fixes in Berkshire?
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 Berkshire: 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 Berkshire do you cover?
All of Berkshire, including Reading, Slough, Bracknell, Maidenhead, Wokingham, Newbury. Rural and remote addresses are covered by arrangement.
How do I get a price for condensation diagnosis and fixes in Berkshire?
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 Berkshire
- Timber roof lantern repairs in Berkshire
- Opening vent and actuator repairs in Berkshire
- Roof lantern respraying in Berkshire
- Cleaning and maintenance in Berkshire
- Urgent leak make-safe in Berkshire
- Roof lantern replacement in Berkshire
Nearby areas
- Condensation diagnosis and fixes in Surrey
- Condensation diagnosis and fixes in Buckinghamshire
- Condensation diagnosis and fixes in Hampshire
- Condensation diagnosis and fixes in Oxfordshire
- Condensation diagnosis and fixes in Greater London
More about condensation diagnosis and fixes · All roof lantern repairs in Berkshire