Greater London · London and the South East
Willesden Green Electronic Leak Detection
Electronic leak detection in Willesden Green from an independent, experienced roof surveyor. More than 20 years and over 5,000 surveys across London and the South East.
- Leaks through a covered membrane
- Leaks that return after repairs
- Leaks through a flat roof with no obvious cause
About our electronic leak detection in Willesden Green
A leak in a flat roof frequently shows up a long way from where the water gets in. That makes leaks hard to trace by eye. ELD tests the waterproofing directly and locates the breach. We test and report, and the repair is for your roofer. On a suitable roof, it takes the guesswork out of finding the hole. We then send you the results in a written report. We survey commercial flat roofs, liquid-applied waterproofing and green roofs, and common reasons people get in touch are leaks under green or ballasted roofs and damage from equipment installers.
Offices, shops and blocks of flats across London often have large flat roofs with plant, rooflights and walkways. Each pipe, upstand and fixing through the covering is a possible weak point. In Willesden Green, roof access is agreed with the building manager or owner beforehand. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
What you get is a clear record of the flat roof membrane on the day we saw it. That makes it useful now and a handy reference later.
- Place
- Willesden Green (NW10, NW2, NW6)
- Region
- Greater London
- Prices
- Quoted for your roof
- Your report
- A written report with photos, by email
- Survey days
- Weekdays and weekends
- Insurance
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
How the survey works
Expect us to ask a few questions before we start, like when any problem began and what work has been done before. Then the inspection itself takes a time that depends on the roof’s area and construction, and we’ll give you a guide when quoting. From the street, a London terrace typically shows only its front slope or parapet, so a visit in Willesden Green moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. If other people live in the building, tell us who can let us into the shared parts.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We check that the membrane and build-up suit electronic leak detection.
- The method depends on the membrane and what sits above and below it.
- We test the membrane and find where current is passing through it.
- The breaches are recorded with photos in a report for your roofer.
How to prepare
- Check the loft hatch can be reached
- Tell us about any leaks, stains or damp patches you know of
- Keep pets in another room
Book a survey
Getting a price is simple: just call 07833 053749 or email us, let us know about the property and we will explain which survey suits. The price is agreed up front.
Related advice
Also near Willesden Green
Other services in Willesden Green
Should I look at the roof myself first?
A lot can be seen from the ground. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Please do not climb up for a closer look.
The one thing to avoid is getting up close. Slates, tiles, flat roofs and rooflights can give way, and falls from height are serious. That is where a survey comes in, using safe viewpoints and a drone where applicable.
Flat and commercial roofs around Willesden Green
Further from the centre, London’s housing takes in interwar semis with hipped roofs in clay or concrete tiles as well as slate-roofed terraces. If your home in Willesden Green is one of them, bay roofs, hips and later dormers each have their own details. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere. The wider area around Willesden Green has a long history of building, with Fenton House about 2.5 miles north-east. If yours is one of the older homes, expect a mix of original materials and later repairs on the roof, and the council can say whether a home is in a conservation area.
Willesden Green is in London, so parking needs planning: let us know about permits, visitor bays or off-street space when booking. Take a building like Donnington Primary School: a large flat roof with lots of outlets and rooflights has many places where a membrane can fail. Take an older house close to Church of St Andrew: flat-roofed rear additions and dormers added over the years are worth checking.
Willesden Green is about 1 mile south-east of Neasden, in Greater London. We carry out electronic leak detection in Willesden Green for houses, flats, blocks and commercial buildings. Willesden Green is one of the places in Greater London where we work for electronic leak detection. Our London page covers surveys nearby.
Surveys in NW10, NW2 and NW6 work the same way as everywhere else we cover. If you need electronic leak detection at a property on Fry Road, High Road and Dean Road or anywhere close by, we can help. We also cover the places around Willesden Green: Willesden (1 mile north), College Park (1 mile south), Kensal Green (1 mile south), Harlesden (1 mile south-west) and Kensal Rise (1 mile south-east). Larger places within reach include London (7 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (3 miles south-east), St Pancras (5 miles east) and Shoreditch (7 miles east).
Around Willesden Green
Around Willesden Green, our work takes us to homes and buildings near Roundwood Park, Brondesbury College and Capital City Academy. Willesden Green’s nearest station is Kensal Rise station, about 0.7 miles south-east of the centre. A little further out are O2 Centre (2.2 miles east) and Brent Museum and Archives (less than half a mile north). Open spaces near Willesden Green include Campden Hill and Westbere Copse.
Questions from Willesden Green
Does a conservation area affect roof work in Willesden Green?
For listing, use Historic England’s list; for conservation areas, ask the council. The answer matters most when a change of material is on the cards.
Is parking a problem for a survey in Willesden Green?
It can be, so it is useful to let us know about permits, visitor bays or off-street space when booking. That way the visit can be planned around it.
What is electronic leak detection?
A sound membrane blocks the test current, but a hole lets it through. That lets us find breaches that are too small to see.
Which days do you carry out surveys?
We survey seven days a week: weekdays, Saturdays and Sundays. Let us know which days suit you when you book.
Will you photograph what you find?
Yes, every report has them. Pictures sit next to the findings they show, which makes the report easy to follow.
Do you use low-voltage or high-voltage testing?
We choose the method that suits the roof. You’ll know which method we plan to use before we start.
What if it rains on the day?
It depends on the weather and the survey. In high wind or heavy rain, a drone cannot fly and access may not be safe, and we’d agree another day.
How the survey changes by roof type
Liquid-applied waterproofing
What lies under a liquid coating decides if ELD will work.
Green and ballasted roofs
Testing before planting or ballast goes on is simpler.
Tips from our surveys
Most of what helps is simple and safe from ground level. A few suggestions:
- Note where leaks show inside and when
- Ask contractors to protect the membrane
- Do not keep patching the same spot
- Do not let outlets block
The report records each breach location with photos. Your roofer uses it to carry out repairs.
Limit foot traffic on flat roofs. Feet and dropped tools are a common cause of holes.
What electronic leak detection doesn’t cover
In fairness, there are limits to any roof survey:
- Build-ups without a suitable layer below
- Sections we can’t safely access
- Water entering through details rather than the membrane
If you are not sure which survey you need, call 07833 053749 or drop us an email and we will give you a straight answer before booking. What a survey covers and doesn’t.
Roof types and parts we check
- Roof terraces and balconies
- Liquid-applied waterproofing
- Single-ply roofs
- Commercial flat roofs
- Green roofs
- Flat roof membranes
Landlords, agents and block managers in Willesden Green
If you own several properties, you can book surveys for several addresses. To discuss a number of properties, ring 07833 053749 or use the contact form.
We also survey roofs for businesses and commercial landlords, including offices, shops and units. Bigger roofs take more time, and they’re priced for the size.