Roof lantern resealing in County Londonderry

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. We carry out roof lantern resealing across County Londonderry, with a guide price from your photos and a fixed price in writing before any work starts.

Sealant being applied along an anthracite aluminium roof lantern glazing bar

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

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.

Wrong product used

General-purpose or acetoxy silicone can fail early on some frames and coatings. Glazing joints need a low-modulus, compatible sealant.

Roof lanterns in County Londonderry

Western and upland parts of the UK get more rain and more wind-driven rain than the east, and that's what finds weak cappings and blocked eaves first. Lanterns here benefit from a check of the bars on the most exposed face and a clear eaves channel before winter.

What should you expect to pay for roof lantern resealing in County Londonderry?

Guide price, per lantern£245–£495 ex VAT£294–£594 inc VAT

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 Northern Ireland?

Most lantern repairs in Northern Ireland need no approval at all. Where a job turns into a replacement, the Building Regulations (Northern Ireland) 2012 apply and we confirm how the work will be signed off before we start. Listed buildings in Northern Ireland need listed building consent from the council for alterations; check with the council's planning service before changing a lantern on a listed property.

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 County Londonderry: questions

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.

Can you match the colour of my frame?

We use sealants in common frame colours such as anthracite grey, black and white, and match as closely as the range allows.

Which towns in County Londonderry do you cover?

All of County Londonderry, including Derry~Londonderry, Coleraine, Limavady, Magherafelt, Portstewart. Rural and remote addresses are covered by arrangement.

How do I get a price for roof lantern resealing in County Londonderry?

Send a few photos of the lantern and the problem with your postcode, by WhatsApp or the form. We reply with a guide price and confirm the fixed price in writing before any work starts.

Other repairs in County Londonderry

Nearby areas

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