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 Essex, 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
- Black mould at the base of the lantern lining
- Wet window sills elsewhere in the house too
What usually causes it?
Cold surfaces
Older glass, uninsulated kerbs and un-thermally-broken frames stay cold and collect condensation.
Poor ventilation
Without trickle vents, extraction or an opening vent, moist air has nowhere to go.
Roof lanterns in Essex
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.
- Chelmsford
- Southend-on-Sea
- Basildon
- Colchester
- Harlow
- Grays
- Braintree
- Brentwood
- Clacton-on-Sea
- South Benfleet
- Canvey Island
- Billericay
- Loughton
- Rayleigh
- Stanford-le-Hope
- Wickford
- Witham
- Maldon
- Waltham Abbey
- South Ockendon
- Harwich
What should you expect to pay for condensation diagnosis and fixes in Essex?
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 Essex: 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 Essex do you cover?
All of Essex, including Chelmsford, Southend-on-Sea, Basildon, Colchester, Harlow, Grays. Rural and remote addresses are covered by arrangement.
How do I get a price for condensation diagnosis and fixes in Essex?
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 Essex
- Roof lantern resealing in Essex
- Slipped glass panel repairs in Essex
- Timber roof lantern repairs in Essex
- Cleaning and maintenance in Essex
- Urgent leak make-safe in Essex
- Orangery lantern repairs in Essex
Nearby areas
- Condensation diagnosis and fixes in Kent
- Condensation diagnosis and fixes in Greater London
- Condensation diagnosis and fixes in Hertfordshire
- Condensation diagnosis and fixes in Suffolk
- Condensation diagnosis and fixes in Surrey
More about condensation diagnosis and fixes · All roof lantern repairs in Essex