Greater London · London and the South East
Electronic Leak Detection in Northolt
Electronic leak detection to pinpoint holes in flat roof membranes in Northolt, carried out by an experienced roof surveyor. Every survey comes with a written report and photos.
- Breaches around outlets and penetrations
- New membranes needing a check before handover
- Water coming in under a flat roof
Electronic leak detection in Northolt: what you get
Electronic testing locates holes in the waterproofing, not every cause of water getting in. Leaks from walls, copings, rooflights or pipes need other checks. If the evidence points elsewhere, we will say so. It will not show water getting in through brickwork or around frames. The report makes clear what was and wasn’t tested. You’ll also know what to check next. If you’ve noticed damp inside with no sign on the roof and leaks through a covered membrane, a survey will tell you what’s going on, whatever the roof.
London has a lot of flat roofs: rear additions, dormers, roof terraces and the roofs of blocks and offices. Coverings range from felt and asphalt to EPDM rubber, GRP fibreglass and single-ply membranes, and each fails in its own way. Which one is on a roof in Northolt shapes how it’s checked. Older flat roofs are often felt or asphalt, newer ones rubber or GRP.
Most points in the report come with a picture, because a photo of a cracked flashing says more than a paragraph. Anything out of sight on the day is listed as such.
- Location
- Northolt (UB5, UB6)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
How the survey works
The aim of the visit is simple: to look at the flat roof membrane as closely as is safe and record what we find. Everything we note and photograph goes into the written report. The visit usually takes a time that depends on the roof’s area and construction, which we’ll explain when we quote. In Northolt, as in much of London, plenty of properties are flats or terraces without side access, so the back of the roof is often seen from upstairs windows, from inside or, where a flight is allowed, from the air. Mention any building rules, key holders or managing agents when booking.
- First, you let us know about the roof build-up and where water is showing.
- 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.
- You get a report showing where each breach is, for your roofer to repair.
Before the survey
- Have keys ready for side gates, garages or roof access doors
- Have any questions written down, so nothing gets missed
- Keep pets out of the way during the survey
Getting a price
Most bookings start with a short call: ring 07833 053749 or send us an email. The price is agreed before a date is set.
Related advice
Towns and villages near Northolt
Also in Northolt
Different roofs, different checks
Inverted and paved roofs
If the build-up rules out ELD, we’ll say so.
Liquid-applied waterproofing
Liquid-applied coatings form a seamless layer, but can still have thin spots or holes. Suitability for ELD depends on the system.
Practical tips
Some practical points come up on survey after survey. They apply to most roofs:
- Avoid repeated repairs without finding the cause
- Keep a note of leaks after rain
- Do not leave water getting in
- Tell us about the membrane and build-up if you know it
File the report with your roof paperwork. It shows the condition of the membrane on that date.
Ask trades working on the roof to protect the membrane when they work up there. Have the roof looked at after other work.
Prices for electronic leak detection in Northolt
To price your survey, we check:
- Extensions, dormers and garages with roofs of their own
- Roof area
- Any need for thermal images or a drone flight
- Height and safe access
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 the job before booking.
Booking your survey
Getting the details right at the start saves time. Please include:
- Any deadline, such as an exchange date
- What’s prompted the survey
- The property’s address and postcode
- How the loft is reached, if there is one
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, call 07833 053749 or email us.
Questions from Northolt
Do you carry out roof surveys in Northolt?
Yes, Northolt is within the area we cover. We survey roofs across London and South East England. You can phone 07833 053749 or email us with the address and a few details.
How do I find out if my home in Northolt is listed?
Start with Historic England’s list for listing and your council for conservation areas. It’s worth checking before planning roof work, as both can affect what’s allowed.
How long have you been surveying roofs?
We have been surveying roofs for over 20 years and have carried out more than 5,000 surveys.
Do you survey roofs on blocks of flats?
Yes, as long as access is agreed. The roof of a block or converted house is often shared, so the freeholder or managing agent needs to agree access. We inspect only the parts we are allowed to reach.
What if it rains on the day?
Light rain doesn’t usually stop a survey, and it can even help show where water is getting in. Strong wind or a downpour can stop drone flights and make roof access unsafe, so if conditions are not right we will arrange another day with you.
What’s the best way to book?
Just call 07833 053749 or use the contact form. After a few questions, we confirm the price and fix a day.
What will the report tell me?
You get our findings in writing, part by part, with photos, and ends with what we recommend. The most urgent items are made clear.
Surveys for landlords and agents in Northolt
For blocks of flats, a roof survey helps managing agents and residents’ management companies plan ahead. Recommendations are set out in order of urgency where relevant.
Any of our surveys can be booked by landlords, agents and building managers in Northolt. To discuss a property or a block, call 07833 053749 or use the contact form.
Electronic leak detection around Northolt
With Northolt Manor about 0.3 miles south, Northolt sits in an area with a long building history. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof. 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. Next to the main roofs there is typically a flat roof somewhere, whether on an extension, a garage or a commercial unit.
Shop and office owners around St. George's Shopping Centre may find that a flat roof over a business is out of sight and out of mind until it leaks. Take an older house close to St Richard's Church: the joins between later flat roofs and the old walls are where problems typically start. Parking in Northolt, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day easier.
Northolt is about 2 miles south-west of Harrow, in Greater London. Northolt gets the same service as everywhere else we work: a proper look at whatever is safely visible, photos and a clear written report. Across Greater London, we cover Northolt and the places around it. You can also see our page for London.
Every address in UB5 and UB6 is within our area for electronic leak detection, from the main roads to the quietest streets. Whether your property is on Church Road, Eastcote Lane North and Tenby Gardens or anywhere close by, we can help. We also cover South Ruislip (1 mile north-west), Greenford (1 mile south-east), South Harrow (1 mile north-east), Yeading (2 miles south-west) and Yiewsley (2 miles south-west). Larger places within reach include London (12 miles east), City of Westminster (10 miles east), Marylebone (10 miles east), Kensington (8 miles south-east), St Pancras (11 miles east) and Shoreditch (13 miles east).
Local landmarks in Northolt
Around Northolt, our work takes us to homes and buildings near Northala Fields, The Greenwood Public House and Northolt High School, among other places. For rail, the closest station is Northolt Park station, about 0.7 miles north-east. Other landmarks nearby include Heath Robinson Museum (3.1 miles north) and Clementine Churchill Hospital (2 miles north-east). Green spaces nearby include Islip Manor Meadows and Northala Fields.
What you can safely check yourself
Look up at the roof after a storm, from ground level: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Don’t go up yourself.
What you cannot do safely is get up close. Slates, tiles, flat roofs and rooflights can give way. That is where a survey comes in, using safe viewpoints and a drone where it applies.