Greater London · London and the South East
Electronic leak detection in Barnet, Greater London
Not sure what state the flat roof membrane is in? We carry out electronic leak detection in Barnet and across Greater London.
- Repairs that haven’t stopped the leak
- Leaks through a flat roof with no obvious cause
- New membranes needing a check before handover
Landlord and commercial surveys in Barnet
A roof problem in a let property affects your tenants as well as the building. A survey helps you spot issues early and plan the work.
Letting agents can arrange access with tenants, at a time agreed in advance. Surveys run on weekdays, Saturdays and Sundays, which can make access easier.
How electronic leak detection works in Barnet
Green roofs, ballasted roofs and roofs under paving are harder to test. What sits on the membrane can affect which method will work, and some may need lifting. We’ll discuss it with you when we quote. Any details of the build-up help, as they show what lies beneath the surface. We’ll tell you if the roof cannot be tested. We survey liquid-applied waterproofing, roof terraces and balconies and green roofs, and common reasons people get in touch are leaks at pipes, outlets or fixings and leaks showing away from the breach.
Offices, shops and blocks of flats across London often have large flat roofs with plant, rooflights and walkways. Every penetration and upstand is a place where a membrane can fail. In Barnet, 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.
Most points in the report come with a picture, so you can see each defect rather than just read about it. Anything out of sight on the day is listed as such.
- Place
- Barnet (EN5, EN4, N20, N11)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Appointments
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Questions from Barnet
Do you carry out roof surveys in Barnet?
Yes, Barnet is within the area we cover. Our area covers London and the South East. You can ring 07833 053749 or drop us an email with the address and a few details, and we will talk through which survey suits.
How do I find out if my home in Barnet is listed?
We can’t confirm that for you, but Historic England’s list and your council can. Both listing and conservation areas can limit changes of roofing material, and councils can also use Article 4 directions.
Will you walk on the roof?
Not unless it’s safe. Most of what we need can be seen from safe viewpoints, the loft and, where it applies, a drone, and anything out of sight is recorded in the report.
What’s the price of ELD?
Electronic leak detection is quoted for your roof, because the method depends on the roof. Size, build-up and access all affect the price. For a quote, call 07833 053749 or email us.
Do you use drones?
Where it helps and the rules allow, yes. We hold a CAA Flyer ID and Operator ID and fly a drone under 250g, and every flight depends on the airspace and the weather.
What insurance do you have?
Every survey is covered by professional indemnity and public liability insurance.
What happens after the survey?
You’ll receive the report by email, and you decide the next step: raise it with a seller, send it to an insurer, brief a roofer or share it with a managing agent.
Local flat roofs in Barnet
About 3.5 miles north lies Wyllyotts Manor, a reminder of how long the area around Barnet has been built on. If yours is one of the older homes, expect a mix of original materials and later repairs on the roof, and any change of roofing material on a listed home needs checking with the council first. In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Mixed in with those pitched roofs are plenty of flat ones, over rear extensions, dormers, garages and shops.
If you live in an older home near St John's United Reformed Church, the flat roofs on later extensions tend to wear out long before the main roof. For landlords with property near New Barnet station, flat roofs over rear additions and dormers in rented property are worth checking between tenancies.
Barnet is about 9 miles east of Watford, in Greater London. From houses to flats and shops in Barnet, we can survey the roof. We cover towns and villages across Greater London, large and small. London is in our area too.
Here we cover the EN5, EN4, N20 and N11 postcode area for electronic leak detection. We cover properties on Station Road, High Street and Sambroke Square. With the B193 and A1081 close by, Barnet is simple for us to get to. Close by, we survey roofs in Underhill (1 mile west), New Barnet (1 mile east), Monken Hadley (1 mile north-west), Hadley Wood (1 mile north-east) and Cockfosters (1 mile east). Further out, we also cover London (11 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (9 miles south) and Shoreditch (10 miles south-east).
Near you in Barnet
Around Barnet, our work takes us to homes and buildings near Queen Elizabeth's Girls' School, The Railway Tavern and Highlands Gardens, among other places. Barnet’s nearest station is New Barnet station, roughly 0.6 miles east. A little further out are Barnet General Hospital (1.2 miles west) and Francis Skaryna Belarusian Library and Museum (2.1 miles south). Open spaces near Barnet include Darland's Lake and Greenhill Gardens.
What we do, step by step
Photographs are taken throughout the visit, so you can see in the report what we found and where. Close-ups come from the safest viewpoint available, including by drone where it is applicable and the weather allows. A typical visit takes longer on a large roof than a small one, with the construction of the roof playing a part too. In Barnet, visits are available on weekdays and at weekends. London parking is often by permit or pay-and-display, so it helps to know what’s near you. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- We start by finding out what the roof is made of and where it leaks.
- The roof is assessed to see if electronic testing will work on it.
- The method depends on the membrane and what sits above and below it.
- The roof is tested and any breaches are located.
- You get a report showing where each breach is, for your roofer to repair.
Preparing for the visit
- Leave side gates unlocked
- Keep pets out of the way during the survey
- Let us know about parking near the property
Booking a survey
If you have photos of the roof, send them over. Take them safely from the ground or a window; never climb up to get a better view. To get started, ring 07833 053749 or send us an email.
Read more
Honest limits
Our findings are based on what we can see safely on the day, so there are some things a survey can’t cover:
- The extent of water in the insulation
- Sections we cannot safely access
- Build-ups without a suitable layer below
Not sure which survey suits your roof? You can phone 07833 053749 or use the contact form and we’ll tell you before you book. What our survey covers.
Roof types and parts we check
- Flat roof membranes
- Single-ply roofs
- Liquid-applied waterproofing
- Commercial flat roofs
- Green roofs
- Roof terraces and balconies
How we price electronic leak detection
Prices always include VAT. The things that change the price are:
- The shape of the roof and its details
- Any need for thermal images or a drone flight
- The height of the building and how the roof can safely be seen
- Extra roofs, like extensions, dormers or garages
To find out what your survey will cost, phone 07833 053749 or send us an email with the address and some details. We’ll confirm the figure before booking.
Helping us price your survey
When you call or email, these details help:
- The address and postcode of the property
- Pictures from the garden or a window, if you have them
- Any marks or damp showing indoors
- The type of building and roof, such as pitched or flat
To book a survey, ring 07833 053749 or send us an email and tell us the address and what’s prompted the survey. We’ll confirm the price before you book.
What happens if roof problems are left?
Water trapped under a membrane can soak insulation and decking. Locating it early helps limit the damage. Blocked gutters and hoppers on London houses overflow and soak brickwork, which can lead to damp inside. A blocked outlet ignored for a winter or two can mean damp walls inside.
Larger roofs, taller buildings and commercial roofs take longer, so they’re priced to match. The price is confirmed before booking.
Why choose Independent Roof Survey in Barnet
- More than 20 years surveying roofs
- 5,000+ roofs surveyed
- Covered by professional indemnity and public liability insurance
- Visits on any day of the week
See what a roof survey costs or what we found on two real jobs.
Towns and villages near Barnet
Other services in Barnet
Signs you need electronic leak detection in Barnet
A breach can be left during installation. Testing before the roof is covered or handed over helps find them.
Look out for signs like these:
- Leaking laps in the waterproofing
- Punctures from foot traffic or tools
- Leaks showing away from the breach
- New membranes needing a check before handover
Take a building like Grasvenor Avenue Infant School: schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks.
What to check before booking
- How they plan to inspect the roof safely
- What happens after the report arrives
- Are they insured for the work?
- Is VAT included in the price?