Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens. Send photos from Grays (RM17) 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
- 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.
About Grays and the RM17 area
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.
Grays is around 19 miles from Chelmsford, and both are within our Essex coverage.
If you're just outside Grays, we also cover South Ockendon (3 miles), Gravesend (3 miles), Dartford (5 miles).
Guide prices for condensation diagnosis and fixes in Grays
Typical range: £145–£495 ex VAT, which is £174–£594 with 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 Grays: questions
How do I get a price for condensation diagnosis and fixes in Grays?
Send a few photos of the lantern and the problem, with your Grays 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 Grays do you cover?
As well as Grays, we cover nearby South Ockendon, Gravesend, Dartford, Stanford-le-Hope and the rest of Essex.
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.
Other lantern repairs in Grays
- Solar control and self-cleaning glass upgrades in Grays
- Timber roof lantern repairs in Grays
- Opening vent and actuator repairs in Grays
- Flat rooflight and skylight repairs in Grays
- Leak investigation and inspection in Grays
- Urgent leak make-safe in Grays
Condensation diagnosis and fixes near Grays
More about condensation diagnosis and fixes · All roof lantern repairs in Grays