Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens. Send photos from Cambridge (CB1) and we'll tell you which it is — with the price agreed in writing before any work.
What you might be seeing
- 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.
Cold surfaces
Older glass, uninsulated kerbs and un-thermally-broken frames stay cold and collect condensation.
Roof lanterns in Cambridge
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.
If you're just outside Cambridge, we also cover Newmarket (13 miles), Ely (15 miles), Huntingdon (16 miles).
How much should it cost?
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 Cambridge: questions
Do you cover Cambridge?
Yes. We cover Cambridge, including the CB1 postcode area, as part of Cambridgeshire. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
Which places near Cambridge do you cover?
As well as Cambridge, we cover nearby Newmarket, Ely, Huntingdon, Haverhill 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 Cambridge
- Glazing bar and capping repairs in Cambridge
- Eaves beam and gutter repairs in Cambridge
- Misted glass unit replacement in Cambridge
- Cracked lantern glass replacement in Cambridge
- Flat rooflight and skylight repairs in Cambridge
- Commercial roof lantern repairs in Cambridge
Condensation diagnosis and fixes near Cambridge
More about condensation diagnosis and fixes · All roof lantern repairs in Cambridge