We carry out misted glass unit replacement in Merthyr Tydfil and across the CF47 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.
Is it time for misted glass unit replacement?
- Fog, droplets or white bloom between the panes
- 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.
Covering Merthyr Tydfil and nearby
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.
Merthyr Tydfil is around 19 miles from Bridgend, and both are within our Mid Glamorgan coverage.
Close by, we also cover Aberdare (4 miles), Tredegar (6 miles), Rhondda (7 miles).
What should you expect to pay in Merthyr Tydfil?
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?
- 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 Merthyr Tydfil: questions
How do I get a price for misted glass unit replacement in Merthyr Tydfil?
Send a few photos of the lantern and the problem, with your Merthyr Tydfil postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
Can you repair a lantern someone else installed in Merthyr Tydfil?
Yes. We repair lanterns whoever fitted them. If yours is still under the installer's warranty, contact them first so you don't affect it.
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.
Will the new pane match the others?
We match tint and coatings as closely as possible; a new unit can look very slightly clearer than older neighbours.
Other lantern repairs in Merthyr Tydfil
- Glazing bar and capping repairs in Merthyr Tydfil
- Ridge and hip repairs in Merthyr Tydfil
- Slipped glass panel repairs in Merthyr Tydfil
- Solar control and self-cleaning glass upgrades in Merthyr Tydfil
- Flat rooflight and skylight repairs in Merthyr Tydfil
- Leak investigation and inspection in Merthyr Tydfil
Misted glass unit replacement near Merthyr Tydfil
More about misted glass unit replacement · All roof lantern repairs in Merthyr Tydfil