We carry out misted glass unit replacement in Aberdare and across the CF44 area. 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.

What you might be seeing
- One pane looks hazier than the others
- Misting that comes and goes with the weather
- 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.
About Aberdare and the CF44 area
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.
We cover Aberdare as part of Mid Glamorgan, about 15 miles from Bridgend.
We also cover nearby Rhondda (4 miles), Merthyr Tydfil (4 miles), Tonypandy (6 miles).
Guide prices for misted glass unit replacement in Aberdare
Typical range: £245–£595 ex VAT, which is £294–£714 with 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?
In Wales, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010 (as applied in Wales), so we set out the route in writing first. 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.
Misted glass unit replacement in Aberdare: questions
Do you cover Aberdare?
Yes. We cover Aberdare, including the CF44 postcode area, as part of Mid Glamorgan. 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 misted glass unit replacement in Aberdare?
Send a few photos of the lantern and the problem, with your Aberdare postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
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 Aberdare
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- Flat roof junction and flashing repairs in Aberdare
- Slipped glass panel repairs in Aberdare
- Flat rooflight and skylight repairs in Aberdare
- Urgent leak make-safe in Aberdare
- Commercial roof lantern repairs in Aberdare
Misted glass unit replacement near Aberdare
More about misted glass unit replacement · All roof lantern repairs in Aberdare