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South Glamorgan · CF64

Upstand and kerb repairs in Penarth

If you're in Penarth and dealing with a rotten or leaking kerb, we can help. We repair, raise, insulate or rebuild the kerb the lantern sits on and re-cover it, and confirm the fixed price in writing before we start.

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In Penarth, as everywhere, the upstand, or kerb, is the raised frame the lantern sits on. Send photos and we'll tell you what we think has failed.

Roofer dressing EPDM membrane up the timber kerb under a roof lantern

Signs you need upstand and kerb repairs

  • Water appearing below the lantern rather than from the glass
  • Soft or spongy timber at the base of the lantern
  • Roof membrane not lapped up the kerb, or peeling off it

Why it happens

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.

Rotten timber

Untreated or wet timber kerbs rot from inside, so the lantern loses support and the seals open.

Roof lanterns in Penarth

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.

Penarth is around 3 miles from Cardiff, and both are within our South Glamorgan coverage.

If you're just outside Penarth, we also cover Cardiff (3 miles), Barry (5 miles), Caerphilly (10 miles).

Guide prices for upstand and kerb repairs in Penarth

Guide price, per lantern£395–£1,295 ex VAT£474–£1,554 inc VAT

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?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

Upstand and kerb repairs in Penarth: questions

How do I get a price for upstand and kerb repairs in Penarth?

Send a few photos of the lantern and the problem, with your Penarth postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.

Do you need to visit to price upstand and kerb repairs?

Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.

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 Penarth

Upstand and kerb repairs near Penarth

More about upstand and kerb repairs · All roof lantern repairs in Penarth

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