Flat rooflights fail in the same places as lanterns: the seal to the upstand, the roof junction and the glass unit. Send photos from Coleraine (BT51) and we'll tell you which it is — with the price agreed in writing before any work.
Signs you need flat rooflight and skylight repairs
- Misted glass
- Ponding on the glass (not enough fall)
- Cracked sealant or a lifted membrane at the upstand
Why it happens
No fall
Flat glass needs a slight fall to shed water; ponding stresses seals.
Upstand detail
As with lanterns, the membrane must be dressed up and sealed.
Roof lanterns in Coleraine
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.
Coleraine is around 27 miles from Derry~Londonderry, and both are within our County Londonderry coverage.
If you're just outside Coleraine, we also cover Portstewart (4 miles), Ballymoney (8 miles), Limavady (13 miles).
What should you expect to pay in Coleraine?
Most flat rooflight and skylight repairs jobs come in between £195 and £595 ex VAT (£234–£714 including VAT), per rooflight. 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?
Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in Northern Ireland. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations (Northern Ireland) 2012; we confirm in writing which route applies before any replacement. 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.
Flat rooflight and skylight repairs in Coleraine: questions
Do you cover Coleraine?
Yes. We cover Coleraine, including the BT51 postcode area, as part of County Londonderry. Send photos by WhatsApp or the form for a free guide price, and we'll confirm the fixed price in writing before any work starts.
How do I get a price for flat rooflight and skylight repairs in Coleraine?
Send a few photos of the lantern and the problem, with your Coleraine postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.
What does a flat rooflight repair cost?
Usually £195–£595 ex VAT, confirmed in writing before work starts.
Can you fix a Velux-style roof window?
Our focus is flat rooflights and lanterns; pitched roof windows are a different trade and we'll say so if that's what you have.
Other lantern repairs in Coleraine
- Roof lantern resealing in Coleraine
- Glazing bar and capping repairs in Coleraine
- Ridge and hip repairs in Coleraine
- Slipped glass panel repairs in Coleraine
- Timber roof lantern repairs in Coleraine
- Roof lantern replacement in Coleraine
Flat rooflight and skylight repairs near Coleraine
More about flat rooflight and skylight repairs · All roof lantern repairs in Coleraine