We carry out roof lantern leak repairs in Welwyn Garden City and across the AL8 area. A roof lantern leak is almost always a failed seal, a lifted capping, blocked eaves drainage or a problem where the kerb meets the flat roof — not a failed lantern.
Is it time for roof lantern leak repairs?
- Drips from a glazing bar or the eaves beam when it rains
- Water running down the inside face of the glass
- Damp patches on the ceiling a short distance from the lantern
Why it happens
Failed silicone or glazing tape
UV and thermal movement break down the seal between capping, gasket and glass. Once a gap opens, water tracks along the bar and drops at the lowest point.
Blocked eaves drainage
Most lanterns collect water in a channel inside the eaves beam and let it out through weep slots. Leaves, moss and grit block the slots and the channel overflows indoors.
About Welwyn Garden City and the AL8 area
Leaf fall from garden trees is the most common cause of eaves overflow on suburban extensions. If your lantern sits near trees, clearing the eaves channel each autumn prevents a lot of drips.
Welwyn Garden City is around 6 miles from St Albans, and both are within our Hertfordshire coverage.
Close by, we also cover Hatfield (3 miles), Hertford (6 miles), St Albans (6 miles).
What should you expect to pay in Welwyn Garden City?
Guide price for roof lantern leak repairs: £195–£595 ex VAT (£234–£714 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?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in England. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010; we confirm in writing which route applies before any replacement. 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.
Roof lantern leak repairs in Welwyn Garden City: questions
How do I get a price for roof lantern leak repairs in Welwyn Garden City?
Send a few photos of the lantern and the problem, with your Welwyn Garden City postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
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.
How much does a roof lantern leak repair cost?
Most leak repairs fall between £195 and £595 ex VAT for a standard lantern with ladder access. The fixed price is confirmed in writing before any work starts.
Can you fix the leak in the rain?
We can make the lantern safe in wet weather, but sealants and tapes need a dry, clean surface to bond, so permanent repairs are done in a dry window.
Other lantern repairs in Welwyn Garden City
- Flat roof junction and flashing repairs in Welwyn Garden City
- Solar control and self-cleaning glass upgrades in Welwyn Garden City
- uPVC roof lantern repairs in Welwyn Garden City
- Flat rooflight and skylight repairs in Welwyn Garden City
- Cleaning and maintenance in Welwyn Garden City
- Roof lantern replacement in Welwyn Garden City
Roof lantern leak repairs near Welwyn Garden City
More about roof lantern leak repairs · All roof lantern repairs in Welwyn Garden City