Each glazing bar on a roof lantern has a top capping that clamps the glass onto gaskets. Send photos from Corby (NN17) and we'll tell you which it is — with the price agreed in writing before any work.

What you might be seeing
- A capping visibly higher than its neighbours
- Gasket rubber poking out, cracked or missing
- Rattling or whistling in wind
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.
Covering Corby and nearby
Leaf fall from garden trees is the most common cause of eaves overflow on suburban extensions. If your lantern sits near trees, clearing the eaves channel each autumn prevents a lot of drips.
Corby is around 19 miles from Northampton, and both are within our Northamptonshire coverage.
Close by, we also cover Uppingham (6 miles), Kettering (7 miles), Market Harborough (10 miles).
How much should it cost?
Guide price for glazing bar and capping repairs: £165–£395 ex VAT (£198–£474 inc 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?
In England, 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, so we set out the route in writing first. 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 Corby: questions
Do you cover Corby?
Yes. We cover Corby, including the NN17 postcode area, as part of Northamptonshire. 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 Corby do you cover?
As well as Corby, we cover nearby Uppingham, Kettering, Market Harborough, Oakham and the rest of Northamptonshire.
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.
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 Corby
- Flat roof junction and flashing repairs in Corby
- Cracked lantern glass replacement in Corby
- Condensation diagnosis and fixes in Corby
- Timber roof lantern repairs in Corby
- Leak investigation and inspection in Corby
- Roof lantern replacement in Corby
Glazing bar and capping repairs near Corby
More about glazing bar and capping repairs · All roof lantern repairs in Corby