We carry out roof lantern resealing in Dover and across the CT16 area. Resealing is the planned, whole-lantern version of a leak repair: we cut out the old, failed sealant, clean every joint back to a sound surface and reseal the cappings, ridge and eaves with materials that suit the frame.
What you might be seeing
- Black mould or dirt lines trapped in old silicone
- Sealant applied over sealant from previous patch repairs
- A lantern that is 8–15 years old and has never been maintained
What usually causes it?
Sealant past its life
Exposed sealant on a roof takes UV, frost and constant expansion and contraction. It hardens, loses grip and pulls away from the glass.
Patch over patch
Fresh sealant run over old, dirty sealant rarely bonds. It looks fixed for a season and then lets go.
About Dover and the CT16 area
Sun and UV do more damage than rain on many lanterns here: brittle ridge caps, chalky finishes and hardened gaskets. They're cheap to replace before they let water in.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
We cover Dover as part of Kent, about 36 miles from Maidstone.
If you're just outside Dover, we also cover Folkestone (7 miles), Deal (8 miles), Canterbury (15 miles).
Guide prices for roof lantern resealing in Dover
Typical range: £245–£495 ex VAT, which is £294–£594 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?
In England, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations 2010, so we set out the route in writing first. 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 resealing in Dover: questions
How do I get a price for roof lantern resealing in Dover?
Send a few photos of the lantern and the problem, with your Dover 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 Dover do you cover?
As well as Dover, we cover nearby Folkestone, Deal, Canterbury, Ramsgate and the rest of Kent.
How much does it cost to reseal a roof lantern?
A standard-size lantern on a single-storey extension is usually £245–£495 ex VAT. Larger lanterns, difficult access or gasket replacement add to that, and you get the fixed price in writing first.
How long does resealing take?
Most domestic lanterns take a few hours in dry weather.
Other lantern repairs in Dover
- Roof lantern leak repairs in Dover
- Misted glass unit replacement in Dover
- Timber roof lantern repairs in Dover
- Aluminium roof lantern repairs in Dover
- Roof lantern respraying in Dover
- Flat rooflight and skylight repairs in Dover
Roof lantern resealing near Dover
More about roof lantern resealing · All roof lantern repairs in Dover