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Gwynedd · LL55

Leak investigation and inspection in Caernarfon

If you're in Caernarfon and dealing with a leak nobody has managed to find, we can help. We find exactly where water is getting in, water-testing where needed, and put it in writing, and confirm the fixed price in writing before we start.

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We carry out leak investigation and inspection in Caernarfon and across the LL55 area. Some leaks are obvious; many aren't.

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

What you might be seeing

  • Previous repairs haven't stopped the leak
  • The leak moves around or is intermittent
  • You're not sure if it's a leak or condensation

What usually causes it?

More than one fault

Older lanterns often have two or three small failures.

Not the lantern

Sometimes the source is the flat roof, a parapet, a gutter or a wall above.

Roof lanterns in Caernarfon

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.

From Bangor, Gwynedd to Caernarfon is roughly 8 miles — all part of the Gwynedd area we cover.

Neighbouring places we cover include Llangefni (8 miles), Bangor, Gwynedd (8 miles), Porthmadog (16 miles).

Guide prices for leak investigation and inspection in Caernarfon

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

Most leak investigation and inspection jobs come in between £145 and £295 ex VAT (£174–£354 including 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 Wales?

Straightforward repairs — resealing, gaskets, cappings, eaves and like-for-like parts — don't normally need building regulations approval in Wales. Replacing the whole lantern or enlarging the opening is different and falls under the Building Regulations 2010 (as applied in Wales); we confirm in writing which route applies before any replacement. Listed buildings in Wales need listed building consent from the local planning authority for alterations, with Cadw guidance on historic buildings; check with the council 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 Caernarfon: questions

How do I get a price for leak investigation and inspection in Caernarfon?

Send a few photos of the lantern and the problem, with your Caernarfon postcode. We'll reply with a guide price and tell you whether a visit is needed before we can fix the price.

Do you need to visit to price leak investigation and inspection?

Not always. Clear photos are often enough for a guide price. Where the cause isn't obvious, a visit to inspect and water-test is charged from £145 ex VAT, confirmed before we come.

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.

Do you provide a report?

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

Other lantern repairs in Caernarfon

Leak investigation and inspection near Caernarfon

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