Each glazing bar on a roof lantern has a top capping that clamps the glass onto gaskets. Send photos from Nelson (BB9) and we'll tell you which it is — with the price agreed in writing before any work.

Signs you need glazing bar and capping repairs
- A capping visibly higher than its neighbours
- Gasket rubber poking out, cracked or missing
- End caps missing at the bottom of a bar
What usually causes it?
Gasket shrinkage
Rubber gaskets shrink back from the ends over time, leaving a gap at the ridge or eaves.
Damage
Ladders, window cleaning or someone stepping on a lantern can bend a capping or unclip it.
Roof lanterns in Nelson
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 Nelson as part of Lancashire, about 21 miles from Preston.
We also cover nearby Colne (2 miles), Burnley (3 miles), Accrington (8 miles).
What should you expect to pay in Nelson?
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 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 Nelson: questions
How do I get a price for glazing bar and capping repairs in Nelson?
Send a few photos of the lantern and the problem, with your Nelson 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 Nelson?
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.
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 Nelson
- Misted glass unit replacement in Nelson
- Solar control and self-cleaning glass upgrades in Nelson
- Opening vent and actuator repairs in Nelson
- Roof lantern respraying in Nelson
- Flat rooflight and skylight repairs in Nelson
- Cleaning and maintenance in Nelson
Glazing bar and capping repairs near Nelson
More about glazing bar and capping repairs · All roof lantern repairs in Nelson