Condensation forms when warm, humid air meets a cold surface — and a roof lantern is the coldest surface in many kitchens. Send photos from Caerphilly (CF83) and we'll tell you which it is — with the price agreed in writing before any work.
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
- 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.
Covering Caerphilly and nearby
Western and upland parts of the UK get more rain and more wind-driven rain than the east, and that's what finds weak cappings and blocked eaves first. Lanterns here benefit from a check of the bars on the most exposed face and a clear eaves channel before winter.
From Newport, Gwent to Caerphilly is roughly 9 miles — all part of the Gwent area we cover.
We also cover nearby Risca (6 miles), Pontypridd (6 miles), Blackwood (6 miles).
What should you expect to pay in Caerphilly?
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 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?
- 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 Caerphilly: questions
Do you cover Caerphilly?
Yes. We cover Caerphilly, including the CF83 postcode area, as part of Gwent. 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.
How do I get a price for condensation diagnosis and fixes in Caerphilly?
Send a few photos of the lantern and the problem, with your Caerphilly postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
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 Caerphilly
- Glazing bar and capping repairs in Caerphilly
- Ridge and hip repairs in Caerphilly
- Upstand and kerb repairs in Caerphilly
- Flat roof junction and flashing repairs in Caerphilly
- Solar control and self-cleaning glass upgrades in Caerphilly
- Flat rooflight and skylight repairs in Caerphilly
Condensation diagnosis and fixes near Caerphilly
More about condensation diagnosis and fixes · All roof lantern repairs in Caerphilly