We carry out roof lantern resealing in Clacton-on-Sea and across the CO15 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.

Is it time for roof lantern resealing?
- Cracked, split or shrunken sealant along the bars
- Black mould or dirt lines trapped in old silicone
- Sealant applied over sealant from previous patch repairs
Common causes we find
Wrong product used
General-purpose or acetoxy silicone can fail early on some frames and coatings. Glazing joints need a low-modulus, compatible sealant.
Patch over patch
Fresh sealant run over old, dirty sealant rarely bonds. It looks fixed for a season and then lets go.
About Clacton-on-Sea and the CO15 area
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.
We cover Clacton-on-Sea as part of Essex, about 30 miles from Chelmsford.
Close by, we also cover Harwich (12 miles), Colchester (13 miles), Felixstowe (15 miles).
Guide prices for roof lantern resealing in Clacton-on-Sea
Guide price for roof lantern resealing: £245–£495 ex VAT (£294–£594 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 resealing in Clacton-on-Sea: questions
How do I get a price for roof lantern resealing in Clacton-on-Sea?
Send a few photos of the lantern and the problem, with your Clacton-on-Sea 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 Clacton-on-Sea do you cover?
As well as Clacton-on-Sea, we cover nearby Harwich, Colchester, Felixstowe, Ipswich and the rest of Essex.
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 Clacton-on-Sea
- Ridge and hip repairs in Clacton-on-Sea
- Misted glass unit replacement in Clacton-on-Sea
- Slipped glass panel repairs in Clacton-on-Sea
- Timber roof lantern repairs in Clacton-on-Sea
- Aluminium roof lantern repairs in Clacton-on-Sea
- Leak investigation and inspection in Clacton-on-Sea
Roof lantern resealing near Clacton-on-Sea
More about roof lantern resealing · All roof lantern repairs in Clacton-on-Sea