We carry out leak investigation and inspection in Lisburn and across the BT27 area. Some leaks are obvious; many aren't.

Is it time for leak investigation and inspection?
- Previous repairs haven't stopped the leak
- The leak moves around or is intermittent
- You need a written report for a landlord, insurer or builder
Why it happens
Hidden water paths
Water can travel along bars, decks and linings before it shows.
Not the lantern
Sometimes the source is the flat roof, a parapet, a gutter or a wall above.
About Lisburn and the BT27 area
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.
Coastal wind drives rain hard against lanterns, so cappings and ridge seals on the seaward face take the most punishment.
Lisburn is around 7 miles from Belfast, and both are within our County Antrim coverage.
Neighbouring places we cover include Belfast (7 miles), Newtownabbey (11 miles), Holywood (12 miles).
How much should it cost?
Guide price for leak investigation and inspection: £145–£295 ex VAT (£174–£354 inc VAT), per visit. 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.
Leak investigation and inspection in Lisburn: questions
Do you cover Lisburn?
Yes. We cover Lisburn, including the BT27 postcode area, as part of County Antrim. 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 leak investigation and inspection in Lisburn?
Send a few photos of the lantern and the problem, with your Lisburn 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 leak investigation cost?
Visits start from £145 ex VAT, up to around £295 for larger lanterns or longer water tests. The cost and what's included are confirmed in writing before we visit.
Is the visit cost deducted from the repair?
Ask when you book — we'll confirm in writing how the visit is charged if you go ahead with the repair.
Other lantern repairs in Lisburn
- Cracked lantern glass replacement in Lisburn
- Solar control and self-cleaning glass upgrades in Lisburn
- Aluminium roof lantern repairs in Lisburn
- uPVC roof lantern repairs in Lisburn
- Flat rooflight and skylight repairs in Lisburn
- Urgent leak make-safe in Lisburn
Leak investigation and inspection near Lisburn
More about leak investigation and inspection · All roof lantern repairs in Lisburn