We carry out glazing bar and capping repairs in Thornaby-on-Tees and across the TS17 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
- Rattling or whistling in wind
- End caps missing at the bottom of a bar
Why it happens
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 Thornaby-on-Tees
Colder winters mean more frosty mornings, and a roof lantern is often the coldest surface in a warm kitchen — so condensation is as common as genuine leaks. We check which you've got before quoting.
If you're just outside Thornaby-on-Tees, we also cover Stockton-on-Tees (3 miles), Billingham (4 miles), Middlesbrough (4 miles).
How much should it cost?
Most glazing bar and capping repairs jobs come in between £165 and £395 ex VAT (£198–£474 including 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 England?
Most lantern repairs in England need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 apply and we confirm how the work will be signed off before we start. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.
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 Thornaby-on-Tees: questions
Do you cover Thornaby-on-Tees?
Yes. We cover Thornaby-on-Tees, including the TS17 postcode area, as part of North Yorkshire. 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.
Which places near Thornaby-on-Tees do you cover?
As well as Thornaby-on-Tees, we cover nearby Stockton-on-Tees, Billingham, Middlesbrough, Darlington and the rest of North Yorkshire.
How much do capping and gasket repairs cost?
Usually £165–£395 ex VAT per lantern depending on how many bars are affected, confirmed in writing before work starts.
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.
Other lantern repairs in Thornaby-on-Tees
- Ridge and hip repairs in Thornaby-on-Tees
- Upstand and kerb repairs in Thornaby-on-Tees
- Slipped glass panel repairs in Thornaby-on-Tees
- Timber roof lantern repairs in Thornaby-on-Tees
- Roof lantern respraying in Thornaby-on-Tees
- Flat rooflight and skylight repairs in Thornaby-on-Tees
Glazing bar and capping repairs near Thornaby-on-Tees
More about glazing bar and capping repairs · All roof lantern repairs in Thornaby-on-Tees