Hertfordshire · London and the South East
Electronic Leak Detection in Harpenden
Electronic leak detection in Harpenden, with over 20 years’ experience behind it. You get a clear report with photographs.
- Leaks through a flat roof with no obvious cause
- Patched roofs that still leak
- Gaps at membrane joints
Electronic leak detection in Harpenden
Electronic testing locates holes in the waterproofing but not every way water gets in. Water coming through walls, copings, rooflights or plumbing won’t show on the test. We will tell you if we think the leak is coming from somewhere else. It will not show water getting in through brickwork or around frames. The report makes clear what was and wasn’t tested. We’ll point you to the likely next step. We’re frequently asked to look into patched roofs that still leak and holes around roof penetrations, across liquid-applied waterproofing, commercial flat roofs and single-ply roofs.
In a town like Harpenden, lots of shops, schools and business units have flat roofs. Out of sight, they tend to be forgotten until a leak appears, and by then the insulation underneath may be wet. A close look at outlets, upstands and the membrane itself shows where it stands. If someone else manages the building, let us know so roof access can be arranged.
Findings are set out part by part, from the coverings down to the gutters. You will see the good as well as the bad.
- Location
- Harpenden (AL5)
- Wider area
- Hertfordshire
- Prices
- Quoted for your roof
- Your report
- A written report with photos, by email
- When we survey
- Weekdays and weekends
- Insured
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
What affects the price in Harpenden
A few things affect what a survey costs:
- Commercial roofs and larger buildings
- Chimneys, valleys, parapets and other details
- Extensions, dormers and garages with roofs of their own
- The use of thermal imaging or a drone
What a survey costs comes down to the roof itself: its size, its height, how many sections it has and how safely it can be seen. Electronic leak detection is quoted for your roof, because the method depends on the roof.
Helping us price your survey
A few details help us recommend the right survey and price. When you contact us, tell us:
- Any stains, drips or damp patches you’ve seen indoors
- The style of property, from a terrace to a block
- When you need the report by
- The address and postcode of the property
Getting a price is simple: just call 07833 053749 or send us an email, let us know about the property and we’ll explain which survey suits. We confirm the price before anything is booked.
How the survey works
On the day, we begin with a quick chat about the roof and anything that’s worrying you. We then inspect everything that can safely be seen. The survey usually takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. Most visits in a town like Harpenden start at the front of the house and work round to the back. The back garden is often where extensions, dormers and rear slopes are best seen. The loft comes next, where there’s safe access.
- First, you let us know about the roof build-up and where water is showing.
- The roof is assessed to see if electronic testing will work on it.
- The testing method is chosen to suit the membrane and build-up.
- We test the membrane and find where current is passing through it.
- The breaches are recorded with photographs in a report for your roofer.
Preparing for the visit
- If it is not your property yet, arrange access through the agent
- Keep pets out of the way during the survey
- Find any records of previous roof work
Getting a price
Every survey is priced before it’s booked, so you know where you stand. Electronic leak detection is quoted for your roof, because the method depends on the roof. To book, call 07833 053749 or drop us an email.
Read more
Why get it checked now?
Not every leak is in the membrane. Testing shows whether the membrane is breached, so other causes can be checked. Extensions and dormers on homes around Harpenden often hide the first signs of trouble at their joints with the main roof. A few wet winters later, it can mean new plaster and decorating as well as roof work.
For a price for your roof in Harpenden, call 07833 053749 or drop us an email and tell us about the roof. We will confirm the figure before booking.
Why book with us
- A written report with photographs
- Thermal imaging and drone inspection where they help
- Over 20 years’ experience
- CAA-registered drone operator (Flyer ID and Operator ID)
Read how roof surveys are priced and what we found on two real jobs.
Surveys for landlords and agents in Harpenden
Landlords, agents and building managers in Harpenden and across Hertfordshire can book any of our surveys. For a price for a let property or a block, call 07833 053749 or use the contact form.
We survey roofs for landlords and letting agents as well as householders. A photo-illustrated written report gives you a clear record of the flat roof membrane, which helps you plan work between tenancies.
Your questions about electronic leak detection in Harpenden
How do I find out if my home in Harpenden is listed?
The council and Historic England’s list are the places to check. It is worth checking before planning roof work, as both can affect what’s allowed.
Do you cover Harpenden?
Yes. We survey roofs across London and South East England, and Harpenden is part of that. Just ring 07833 053749 or send us an email and let us know about the property, and we’ll talk through which survey suits.
Does ELD work under paving or planting?
In some cases. The layers on top and the build-up below decide it, and some may need lifting. We’ll discuss it before we quote.
How long have you been surveying roofs?
We have more than 20 years’ experience and have carried out more than 5,000 surveys across London and South East England.
Do you carry professional indemnity insurance?
We hold professional indemnity and public liability insurance.
Does the report include photos?
Yes, plenty. Each finding is shown in a picture where possible.
Do I have to be there for the survey?
That depends on the survey. For inside areas and the loft space, someone has to give us access; we’ll agree the details as you book.
Roof by roof
Green and ballasted roofs
Some layers may need lifting for testing. We discuss this before quoting.
Liquid-applied waterproofing
Pinholes in a coating can let water through. Where the roof suits it, testing can find them.
Places near Harpenden
Other services in Harpenden
When to book a survey in Harpenden
Other trades on the roof can puncture the waterproofing. Engineers fitting equipment, solar panels or aerials may leave damage behind.
Here are some of the things we see often:
- Leaks showing away from the breach
- New membranes needing a check before handover
- Failed seams and laps
- Leaks through a covered membrane
If you let a flat or house near Harpenden station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Choosing a roof surveyor
- Their report turnaround times
- What experience they bring
- Whether they hold professional indemnity and public liability insurance
- Will the report include photos?
Local flat roofs in Harpenden
Historic houses such as Childwickbury Manor, about 2.6 miles south, show how far back building in the area around Harpenden goes. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile, and flat-roofed additions turn up almost everywhere. Next to the main roofs there’s normally a flat roof somewhere, whether on an extension, a garage or a commercial unit.
For an older house near a landmark such as St Nicholas Church, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof. If you look after a building like Harpenden Academy, a large flat roof with a good many outlets and rooflights has many places where a membrane can fail.
Harpenden is about 6 miles north-east of Hemel Hempstead, in Hertfordshire. Whether the building in Harpenden is a house, a flat or a commercial unit, the roof can be surveyed on a weekday or at the weekend. We cover towns and villages across Hertfordshire. Our Milton Keynes page covers surveys nearby.
Surveys in AL5 are booked the same way as anywhere else. Whether your property is on Station Road, High Street and Connaught Road or anywhere close by, we can survey it. Being close to the B652 and B653, Harpenden is easy for us to reach. Other places close to Harpenden include Batford (1 mile north-east), Lea Valley (1 mile east), Bower Heath (1 mile north), Mackerye End (1 mile north-east) and The Folly (2 miles east). We also work in nearby towns like Watford (11 miles south), Hemel Hempstead (6 miles south-west), Stevenage (10 miles north-east), St Albans (5 miles south), Welwyn Garden City (7 miles east) and Hitchin (10 miles north). Harpenden is among the bigger towns we cover in Hertfordshire.
Local landmarks in Harpenden
Around Harpenden, our work takes us to homes and buildings near Lydekker Park, The Junction pub and Sir John Lawes School, among other places. Harpenden has its own railway station: Harpenden station. Other landmarks nearby include Harpenden Museum (less than half a mile south-west) and Luton Castle (5 miles north-west). Open spaces near Harpenden include Wheathampstead Local Nature Reserve and Verulamium Lake.