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County Londonderry · BT47

Leak investigation and inspection in Derry~Londonderry

Dealing with a leak nobody has managed to find in Derry~Londonderry (BT47)? We find exactly where water is getting in, water-testing where needed, and put it in writing, with a fixed price agreed in writing first.

Get a guide priceCall 0800 088 6248

In Derry~Londonderry, as everywhere, some leaks are obvious; many aren't. Send photos and we'll tell you what we think has failed.

Surveyor on a step ladder inspecting the eaves of a roof lantern with a torch and moisture meter

Is it time for leak investigation and inspection?

  • The leak moves around or is intermittent
  • You're not sure if it's a leak or condensation
  • 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.

Covering Derry~Londonderry and nearby

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.

If you're just outside Derry~Londonderry, we also cover Strabane (14 miles), Limavady (15 miles), Portstewart (27 miles).

Guide prices for leak investigation and inspection in Derry~Londonderry

Guide price, per visit£145–£295 ex VAT£174–£354 inc VAT

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?

In Northern Ireland, like-for-like repairs to a roof lantern don't usually involve building control. A full replacement or a bigger opening is controlled under the Building Regulations (Northern Ireland) 2012, so we set out the route in writing first. 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?

  1. Send photosWhatsApp or upload a few photos and tell us when it leaks.
  2. Guide priceWe reply with a guide price and whether a visit is needed.
  3. Fixed price in writingYou approve the price and the date before anything starts.
  4. Repair and testWe fix what's failed, water-test where it matters, and send photos.

Leak investigation and inspection in Derry~Londonderry: questions

How do I get a price for leak investigation and inspection in Derry~Londonderry?

Send a few photos of the lantern and the problem, with your Derry~Londonderry 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 Derry~Londonderry do you cover?

As well as Derry~Londonderry, we cover nearby Strabane, Limavady, Portstewart, Coleraine and the rest of County Londonderry.

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.

Do you provide a report?

Yes, with photos and findings, which is useful for landlords, insurers and disputes with installers.

Other lantern repairs in Derry~Londonderry

Leak investigation and inspection near Derry~Londonderry

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