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Hertfordshire · AL5

Leak investigation and inspection in Harpenden

Dealing with a leak nobody has managed to find in Harpenden (AL5)? 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

We carry out leak investigation and inspection in Harpenden and across the AL5 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?

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.

Roof lanterns in Harpenden

Most inland lantern leaks aren't storm damage; they're usually tired sealant, a lifted capping or blocked eaves drainage. All three are quick to find and fix once you know where to look.

From St Albans to Harpenden is roughly 5 miles — all part of the Hertfordshire area we cover.

We also cover nearby St Albans (5 miles), Luton (5 miles), Hemel Hempstead (6 miles).

How much should it cost?

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

Typical range: £145–£295 ex VAT, which is £174–£354 with 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 England?

Most lantern repairs in England need no approval at all. Where a job turns into a replacement, the Building Regulations 2010 apply and we confirm how the work will be signed off before we start. Listed buildings need listed building consent from the local council for alterations, and conservation areas can have extra controls; like-for-like repairs are treated differently from changes, so check with the council's conservation officer first.

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 Harpenden: questions

Do you cover Harpenden?

Yes. We cover Harpenden, including the AL5 postcode area, as part of Hertfordshire. 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.

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.

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Leak investigation and inspection near Harpenden

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