Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens. Send photos from March (PE15) 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?
- Drips after cooking, showers or drying clothes
- Black mould at the base of the lantern lining
- 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.
About March and the PE15 area
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 March as part of Cambridgeshire, about 24 miles from Cambridge.
Close by, we also cover Wisbech (8 miles), Ely (13 miles), Peterborough (14 miles).
Guide prices for condensation diagnosis and fixes in March
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?
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.
Condensation diagnosis and fixes in March: questions
How do I get a price for condensation diagnosis and fixes in March?
Send a few photos of the lantern and the problem, with your March 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 March do you cover?
As well as March, we cover nearby Wisbech, Ely, Peterborough, King's Lynn and the rest of Cambridgeshire.
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.
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 March
- Roof lantern leak repairs in March
- Misted glass unit replacement in March
- Slipped glass panel repairs in March
- Opening vent and actuator repairs in March
- Leak investigation and inspection in March
- Cleaning and maintenance in March
Condensation diagnosis and fixes near March
More about condensation diagnosis and fixes · All roof lantern repairs in March