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 Windsor (SL4) and we'll tell you which it is — with the price agreed in writing before any work.
Signs you need roof lantern resealing
- Cracked, split or shrunken sealant along the bars
- Several small leaks rather than one obvious one
- A lantern that is 8–15 years old and has never been maintained
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.
Covering Windsor and nearby
Most inland lantern leaks aren't storm damage; they're usually tired sealant, a lifted capping or blocked eaves drainage. All three are quick to find and fix once you know where to look.
From Reading to Windsor is roughly 16 miles — all part of the Berkshire area we cover.
If you're just outside Windsor, we also cover Slough (2 miles), Egham (4 miles), Staines (5 miles).
What should you expect to pay in Windsor?
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?
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.
Roof lantern resealing in Windsor: questions
How do I get a price for roof lantern resealing in Windsor?
Send a few photos of the lantern and the problem, with your Windsor 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 Windsor do you cover?
As well as Windsor, we cover nearby Slough, Egham, Staines, Maidenhead and the rest of Berkshire.
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 Windsor
- Glazing bar and capping repairs in Windsor
- Slipped glass panel repairs in Windsor
- Timber roof lantern repairs in Windsor
- uPVC roof lantern repairs in Windsor
- Cleaning and maintenance in Windsor
- Orangery lantern repairs in Windsor
Roof lantern resealing near Windsor
More about roof lantern resealing · All roof lantern repairs in Windsor