The upstand, or kerb, is the raised frame the lantern sits on. Send photos from Isleworth (TW7) and we'll tell you which it is — with the price agreed in writing before any work.

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
- Ponding water against the kerb after rain
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 Isleworth
Drier, sunnier parts of the UK are kinder to seals than the wet west, but strong sun ages sealant, gaskets and plastic end caps, and south- or west-facing lanterns can make rooms very warm. Solar control glass and an opening vent help.
London's extensions are often tight to neighbouring walls and roofs. Where a repair needs access over a neighbour's property, we'll tell you in advance so you can arrange it.
From Westminster to Isleworth is roughly 9 miles — all part of the Greater London area we cover.
If you're just outside Isleworth, we also cover Hounslow (1 mile), Heston (2 miles), Richmond (2 miles).
How much should it cost?
Typical range: £395–£1,295 ex VAT, which is £474–£1,554 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.
Upstand and kerb repairs in Isleworth: questions
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.
Which places near Isleworth do you cover?
As well as Isleworth, we cover nearby Hounslow, Heston, Richmond, Southall and the rest of Greater London.
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.
Will my ceiling need repairing?
If water has soaked the lining it may need making good after the leak is fixed; we can advise, but internal decorating isn't included unless quoted.
Other lantern repairs in Isleworth
- Cracked lantern glass replacement in Isleworth
- Condensation diagnosis and fixes in Isleworth
- Timber roof lantern repairs in Isleworth
- Flat rooflight and skylight repairs in Isleworth
- Urgent leak make-safe in Isleworth
- Roof lantern replacement in Isleworth
Upstand and kerb repairs near Isleworth
More about upstand and kerb repairs · All roof lantern repairs in Isleworth