Greater London · London and the South East
West Hendon Electronic Leak Detection
Independent electronic leak detection in West Hendon. We’ve completed more than 5,000 surveys across London and South East England.
- Leaks at pipes, outlets or fixings
- New roofs to check before paving or planting
- Leaks showing away from the breach
Electronic leak detection for homes and businesses in West Hendon
Water can travel under a flat roof membrane before it shows inside. That makes leaks hard to trace by eye. ELD tests the waterproofing directly, to find where it has been breached. It is testing only and leave the repair to your roofer. On a suitable roof, it takes the guesswork out of finding the hole. The results then follow in a written report with photos. If you are worried about failed seams and laps and patched roofs that still leak, a survey will tell you what’s going on.
Across London, flat roofs are everywhere, from back additions and dormers to roof terraces, blocks of flats and offices. They’re covered in felt, asphalt, EPDM rubber, GRP fibreglass or single-ply membranes, and each fails in its own way. Which one is on a roof in West Hendon shapes how it is checked. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
Nothing in the report is left vague: where something needs attention, it says so plainly, and where it can wait, that’s said too.
- Place
- West Hendon (NW9, NW4)
- Region
- Greater London
- Cost
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- Appointments
- Weekdays, Saturdays and Sundays
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Last updated
- 27 October 2026
What we can’t see
Without opening up the roof, some things stay hidden, so a survey has limits:
- Carrying out the repair work
- Leaks from walls, copings or rooflights
- Parts of the roof covered by fixed equipment
If in doubt, ring 07833 053749 or use the contact form and we will suggest the right survey before you book. The full list of what we check.
What we look at
- Flat roof membranes
- Roof terraces and balconies
- Single-ply roofs
- Green roofs
- Liquid-applied waterproofing
- Commercial flat roofs
Towns and villages near West Hendon
Other services in West Hendon
Different roofs, different checks
Inverted and paved roofs
Inverted roofs have the insulation on top of the waterproofing, which affects testing.
Bituminous membranes
Older felt roofs often have seams and patches that can leak. We test where the roof suits it.
Checking the roof from the ground
Fresh stains on ceilings or walls after rain are worth noting. Photograph them and note the date.
It helps to keep a record: when leaks happen, ground-level photos and any past roof work. Send it with your enquiry.
How the survey works
We’ll ask a few questions first, like when any problem began and what work has been done before. The inspection then takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. London terraces rarely offer a view of the whole roof from one spot, so a visit in West Hendon moves between viewpoints: the pavement, upstairs windows, the loft and any safe spot at the back. If other people live in the building, let us know who can let us into the shared parts.
- You let us know about the roof and where water is showing.
- We check whether the membrane and build-up suit ELD.
- We choose a low-voltage or high-voltage method to match the roof.
- The membrane is tested and breaches are found.
- You get a report with photos of each breach.
How to prepare
- Have keys ready for side gates, garages or roof access doors
- For a flat or shared roof, check access with the freeholder or managing agent
- Move anything stored under the loft hatch
Booking a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, phone 07833 053749 or use the contact form.
Advice
Questions from West Hendon
Do you carry out roof surveys in West Hendon?
Yes, West Hendon is one of the places we work. Every survey there gets the same written report with photographs, and visits run on weekdays and weekends.
Is parking a problem for a survey in West Hendon?
Normally it is manageable with a little notice. Tell us what parking is available nearby, and the visit is planned around it.
Will you go up on the roof?
Only when it is safe. Most of what we need can be seen from safe viewpoints, the loft and, where applicable, a drone, and anything out of sight is recorded in the report.
Do you use low-voltage or high-voltage testing?
The roof decides the method. We will explain why when we quote.
Does someone need to be in?
Not necessarily. If we only need the outside, we can agree that in advance, but anything inside needs someone there to give access.
How experienced are you?
More than 5,000 surveys over 20+ years, across London and South East England.
What is electronic leak detection?
It uses an electrical current to find breaches in a flat roof membrane. The current only gets through where the membrane is breached so we can pinpoint it.
What a survey costs
The price reflects the time and kit the roof needs. The main factors are:
- Commercial roofs and larger buildings
- The shape of the roof and its details
- Any need for thermal images or a drone flight
- Extensions, dormers and garages with roofs of their own
Every price we give includes VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. We confirm the price for your survey before booking.
Booking your survey
When you call or email, these details help:
- Photos of the roof, taken safely from ground level or a window
- Where water is showing inside, if it is
- Your postcode, so we can check access and travel
- The reason for the survey, like buying, a leak or storm damage
To book a survey, ring 07833 053749 or send us an email and tell us the address and what’s prompted the survey. You’ll know the price before anything is booked.
Tips from our surveys
There is plenty you can do without going near the roof. What helps most:
- Check trades protect the waterproofing
- Check new waterproofing before handover
- Record dates and spots where water appears
- Find the breach before more patching
Once repairs are made, the roof can be tested again if you want to check them, where the roof still suits the method.
ELD before paving, ballast or planting goes on is worth considering. It’s easier to find holes before more layers are added.
Flat roofs in West Hendon
Historic houses like Heath House, about 3.2 miles south-east, show how far back building in the area around West Hendon goes. Older roofs in the wider area can hide decades of patch repairs, so the detail matters. 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. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
West Hendon is in London, so parking needs planning: let us know about permits, visitor bays or off-street space when booking. Take an older house close to St Matthias the Apostle church: the flat roofs on later extensions tend to wear out long before the main roof. For site and facilities teams at buildings such as The Hyde School, schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks.
West Hendon is about 2 miles north of Neasden, in Greater London. Wherever you are in West Hendon, we can carry out electronic leak detection at your property. We cover towns and villages across Greater London, from the larger towns to small villages. For surveys nearby, see our London page.
All of NW9 and NW4 is within our area for electronic leak detection, from the main roads to the quietest streets. That includes homes and businesses on Alpini Road, Catkin Road and Garrick Road and the roads around them. West Hendon sits on or near the A5, which makes travel easy. We also cover The Hyde (1 mile south), Colindale (1 mile north), The Burroughs (1 mile north-east), Hendon (1 mile east) and Staples Corner (1 mile south-east). We also work in nearby towns such as London (9 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles south-east), Kensington (6 miles south), St Pancras (7 miles south-east) and Shoreditch (8 miles south-east).
Near you in West Hendon
We work in homes and buildings around Woodfield School, Moon Under Water pub and Brampton College, among other places. There is a railway station in West Hendon itself: Hendon station. Other landmarks nearby include Brent Cross Shopping Centre (1.1 miles east) and Church Farmhouse Museum (1 mile north-east). For a walk, there is Masons Field and Parliament Hill.