ROOFLANTERNREPAIRS.co.uk
0800 088 6248 Get a guide price

Gwent · CF83

Misted glass unit replacement in Caerphilly

We cover Caerphilly and the wider Gwent area for misted glass unit replacement. In short, we measure, order and fit replacement sealed units for misted panes, keeping the rest of the lantern — and you know the price before any work begins.

Get a guide priceCall 0800 088 6248

If a roof lantern pane looks cloudy or wet between the two layers of glass, the sealed unit has failed and moisture has got inside. Send photos from Caerphilly (CF83) and we'll tell you which it is — with the price agreed in writing before any work.

Roof lantern seen from inside with one misted double glazed pane between clear panes

What you might be seeing

  • Fog, droplets or white bloom between the panes
  • One pane looks hazier than the others
  • Water marks or tide lines inside the unit

Common causes we find

Water sitting on the edge

If the unit's edge sits in water because the eaves don't drain, the seal fails sooner.

Movement and age

Thermal movement and age wear the seal; units at the bottom of the lantern often go first.

Roof lanterns in Caerphilly

Damp, mild winters keep moss and algae growing on flat roofs and lantern frames, which holds water against seals and blocks weep slots. Regular clearing makes a real difference in wetter areas.

Caerphilly is around 9 miles from Newport, Gwent, and both are within our Gwent coverage.

If you're just outside Caerphilly, we also cover Risca (6 miles), Pontypridd (6 miles), Blackwood (6 miles).

How much should it cost?

Guide price, per glass unit£245–£595 ex VAT£294–£714 inc VAT

Most misted glass unit replacement jobs come in between £245 and £595 ex VAT (£294–£714 including VAT), per glass unit. 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?

Most lantern repairs in Wales need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 (as applied in Wales) apply and we confirm how the work will be signed off before we start. 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.

Misted glass unit replacement in Caerphilly: questions

Do you need to visit to price misted glass unit replacement?

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.

Which places near Caerphilly do you cover?

As well as Caerphilly, we cover nearby Risca, Pontypridd, Blackwood, Cardiff and the rest of Gwent.

How much does a misted lantern unit cost to replace?

Usually £245–£595 ex VAT per unit depending on size, glass spec and access, confirmed in writing before work starts.

How long does a replacement unit take?

Units are made to measure, so there's a lead time between measuring and fitting. Fitting itself is usually a short visit.

Other lantern repairs in Caerphilly

Misted glass unit replacement near Caerphilly

More about misted glass unit replacement · All roof lantern repairs in Caerphilly

Call freeGuide price