The upstand, or kerb, is the raised frame the lantern sits on. Send photos from Cardiff (CF10) and we'll tell you which it is — with the price agreed in writing before any work.
Is it time for upstand and kerb repairs?
- Water appearing below the lantern rather than from the glass
- Soft or spongy timber at the base of the lantern
- Cold, damp or mouldy lining around the opening
What usually causes it?
Kerb too low
If the kerb doesn't rise enough above the finished roof, water sits against the joint during heavy rain.
Membrane not dressed up
The flat roof covering should run up the kerb and be trimmed or flashed. If it stops short, water gets behind it.
About Cardiff and the CF10 area
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 also cover nearby Penarth (3 miles), Caerphilly (7 miles), Barry (7 miles).
How much should it cost?
Most upstand and kerb repairs jobs come in between £395 and £1,295 ex VAT (£474–£1,554 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 Wales?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in Wales. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010 (as applied in Wales); we confirm in writing which route applies before any replacement. 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.
Upstand and kerb repairs in Cardiff: questions
Do you cover Cardiff?
Yes. We cover Cardiff, including the CF10 postcode area, as part of South Glamorgan. 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 upstand and kerb repairs in Cardiff?
Send a few photos of the lantern and the problem, with your Cardiff postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
How much does an upstand repair cost?
Typically £395–£1,295 ex VAT depending on size, timber condition and the roof covering. The fixed price is confirmed in writing before work starts.
Can you add insulation to the kerb?
Yes. Insulated kerbs reduce cold bridging and help with condensation around the opening.
Other lantern repairs in Cardiff
- Roof lantern resealing in Cardiff
- Slipped glass panel repairs in Cardiff
- Timber roof lantern repairs in Cardiff
- uPVC roof lantern repairs in Cardiff
- Urgent leak make-safe in Cardiff
- Orangery lantern repairs in Cardiff
Upstand and kerb repairs near Cardiff
More about upstand and kerb repairs · All roof lantern repairs in Cardiff