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South Glamorgan · CF61

Condensation diagnosis and fixes in Llantwit Major

For condensation diagnosis and fixes in Llantwit Major, the job is simple to describe: we work out whether it's condensation or a leak, then fix the cause — ventilation, kerb or glass. Photos first, a guide price back, then a written fixed price.

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We carry out condensation diagnosis and fixes in Llantwit Major and across the CF61 area. Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens.

Condensation droplets on the inside of roof lantern glass on a cold morning

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

Why it happens

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 Llantwit Major

Wind-driven rain is the real test of a roof lantern, and the wetter west sees plenty of it. Leaks that appear only in a storm from one direction usually point to the cappings or eaves on that face — a useful clue when you send us photos.

Llantwit Major is around 14 miles from Cardiff, and both are within our South Glamorgan coverage.

Neighbouring places we cover include Cowbridge (4 miles), Bridgend (8 miles), Barry (9 miles).

Guide prices for condensation diagnosis and fixes in Llantwit Major

Guide price, per visit£145–£495 ex VAT£174–£594 inc VAT

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 Wales?

Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in Wales. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010 (as applied in Wales); we confirm in writing which route applies before any replacement. Listed buildings in Wales need listed building consent from the local planning authority for alterations, with Cadw guidance on historic buildings; check with the council before changing a lantern on a listed property.

How does it work?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

Condensation diagnosis and fixes in Llantwit Major: questions

How do I get a price for condensation diagnosis and fixes in Llantwit Major?

Send a few photos of the lantern and the problem, with your Llantwit Major 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 Llantwit Major do you cover?

As well as Llantwit Major, we cover nearby Cowbridge, Bridgend, Barry, Porthcawl and the rest of South Glamorgan.

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 Llantwit Major

Condensation diagnosis and fixes near Llantwit Major

More about condensation diagnosis and fixes · All roof lantern repairs in Llantwit Major

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