In Penzance, as everywhere, each glazing bar on a roof lantern has a top capping that clamps the glass onto gaskets. Send photos and we'll tell you what we think has failed.
What you might be seeing
- Gasket rubber poking out, cracked or missing
- Water running down one glazing bar inside
- End caps missing at the bottom of a bar
Common causes we find
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.
About Penzance and the TR18 area
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.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
Penzance is around 24 miles from Truro, and both are within our Cornwall coverage.
If you're just outside Penzance, we also cover Camborne (12 miles), Redruth (16 miles), Falmouth (21 miles).
Guide prices for glazing bar and capping repairs in Penzance
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?
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 Penzance: questions
Do you cover Penzance?
Yes. We cover Penzance, including the TR18 postcode area, as part of Cornwall. 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.
How do I get a price for glazing bar and capping repairs in Penzance?
Send a few photos of the lantern and the problem, with your Penzance postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
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 Penzance
- Solar control and self-cleaning glass upgrades in Penzance
- Aluminium roof lantern repairs in Penzance
- uPVC roof lantern repairs in Penzance
- Roof lantern respraying in Penzance
- Leak investigation and inspection in Penzance
- Urgent leak make-safe in Penzance
Glazing bar and capping repairs near Penzance
More about glazing bar and capping repairs · All roof lantern repairs in Penzance