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. Send photos from Seaham (SR7) and we'll tell you which it is — with the price agreed in writing before any work.
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
Common causes we find
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.
Roof lanterns in Seaham
Snow and ice sitting at the eaves can block a lantern's drainage and push water back under the glass as it melts. If your lantern leaks after a thaw rather than after rain, tell us — it points to the eaves and kerb.
Seaham is around 10 miles from Durham, and both are within our County Durham coverage.
If you're just outside Seaham, we also cover Houghton-le-Spring (5 miles), Sunderland (5 miles), Peterlee (5 miles).
Guide prices for roof lantern resealing in Seaham
Most roof lantern resealing jobs come in between £245 and £495 ex VAT (£294–£594 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?
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 Seaham: questions
How do I get a price for roof lantern resealing in Seaham?
Send a few photos of the lantern and the problem, with your Seaham 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 Seaham do you cover?
As well as Seaham, we cover nearby Houghton-le-Spring, Sunderland, Peterlee, Washington and the rest of County Durham.
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 Seaham
- Roof lantern leak repairs in Seaham
- Upstand and kerb repairs in Seaham
- Aluminium roof lantern repairs in Seaham
- Roof lantern respraying in Seaham
- Cleaning and maintenance in Seaham
- Roof lantern replacement in Seaham
Roof lantern resealing near Seaham
More about roof lantern resealing · All roof lantern repairs in Seaham