The upstand, or kerb, is the raised frame the lantern sits on. Send photos from Welwyn Garden City (AL8) 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
- Roof membrane not lapped up the kerb, or peeling off it
- Cold, damp or mouldy lining around the opening
Why it happens
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.
Roof lanterns in Welwyn Garden City
Lanterns in central England see a bit of everything — summer sun that ages seals and end caps, autumn leaf fall that blocks eaves, and frosty mornings that bring condensation. A yearly check covers all three.
We cover Welwyn Garden City as part of Hertfordshire, about 6 miles from St Albans.
Close by, we also cover Hatfield (3 miles), Hertford (6 miles), St Albans (6 miles).
Guide prices for upstand and kerb repairs in Welwyn Garden City
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 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 Welwyn Garden City: 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 Welwyn Garden City do you cover?
As well as Welwyn Garden City, we cover nearby Hatfield, Hertford, St Albans, Harpenden and the rest of Hertfordshire.
Can you add insulation to the kerb?
Yes. Insulated kerbs reduce cold bridging and help with condensation around the opening.
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 Welwyn Garden City
- Cracked lantern glass replacement in Welwyn Garden City
- Slipped glass panel repairs in Welwyn Garden City
- Timber roof lantern repairs in Welwyn Garden City
- Aluminium roof lantern repairs in Welwyn Garden City
- uPVC roof lantern repairs in Welwyn Garden City
- Roof lantern replacement in Welwyn Garden City
Upstand and kerb repairs near Welwyn Garden City
More about upstand and kerb repairs · All roof lantern repairs in Welwyn Garden City