We carry out glazing bar and capping repairs in Mold and across the CH7 area. Each glazing bar on a roof lantern has a top capping that clamps the glass onto gaskets.

Is it time for glazing bar and capping repairs?
- Gasket rubber poking out, cracked or missing
- Water running down one glazing bar inside
- Rattling or whistling in wind
Common causes we find
Gasket shrinkage
Rubber gaskets shrink back from the ends over time, leaving a gap at the ridge or eaves.
Fixings working loose
Screws and clips that hold the capping relax with thermal movement, so the clamp on the glass weakens.
Roof lanterns in Mold
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.
We cover Mold as part of Clwyd, about 10 miles from Wrexham.
If you're just outside Mold, we also cover Buckley (2 miles), Deeside (5 miles), Flint (5 miles).
Guide prices for glazing bar and capping repairs in Mold
Typical range: £165–£395 ex VAT, which is £198–£474 with VAT, per lantern. 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.
Glazing bar and capping repairs in Mold: questions
How do I get a price for glazing bar and capping repairs in Mold?
Send a few photos of the lantern and the problem, with your Mold 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 Mold do you cover?
As well as Mold, we cover nearby Buckley, Deeside, Flint, Ruthin and the rest of Clwyd.
Can a capping just be clipped back on?
Sometimes, if nothing underneath has failed. We check the gaskets first, because clipping a capping over a perished gasket doesn't stop the leak.
Do you repair uPVC and timber lantern bars too?
Yes. Timber lanterns use different beads and cappings, and we repair those as part of timber lantern repairs.
Other lantern repairs in Mold
- Roof lantern resealing in Mold
- Upstand and kerb repairs in Mold
- Flat roof junction and flashing repairs in Mold
- Cracked lantern glass replacement in Mold
- uPVC roof lantern repairs in Mold
- Roof lantern replacement in Mold
Glazing bar and capping repairs near Mold
More about glazing bar and capping repairs · All roof lantern repairs in Mold