We carry out condensation diagnosis and fixes in Stockton-on-Tees and across the TS19 area. Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens.

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
- Black mould at the base of the lantern lining
Why it happens
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.
About Stockton-on-Tees and the TS19 area
Colder winters mean more frosty mornings, and a roof lantern is often the coldest surface in a warm kitchen — so condensation is as common as genuine leaks. We check which you've got before quoting.
From Durham to Stockton-on-Tees is roughly 18 miles — all part of the County Durham area we cover.
Close by, we also cover Billingham (2 miles), Thornaby-on-Tees (3 miles), Middlesbrough (3 miles).
Guide prices for condensation diagnosis and fixes in Stockton-on-Tees
Most condensation diagnosis and fixes jobs come in between £145 and £495 ex VAT (£174–£594 including 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?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. 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 Stockton-on-Tees: questions
How do I get a price for condensation diagnosis and fixes in Stockton-on-Tees?
Send a few photos of the lantern and the problem, with your Stockton-on-Tees postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Do you need to visit to price condensation diagnosis and fixes?
Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.
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.
Other lantern repairs in Stockton-on-Tees
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- Ridge and hip repairs in Stockton-on-Tees
- Solar control and self-cleaning glass upgrades in Stockton-on-Tees
- Timber roof lantern repairs in Stockton-on-Tees
- Flat rooflight and skylight repairs in Stockton-on-Tees
- Leak investigation and inspection in Stockton-on-Tees
Condensation diagnosis and fixes near Stockton-on-Tees
More about condensation diagnosis and fixes · All roof lantern repairs in Stockton-on-Tees