Greater London · London and the South East
Electronic Leak Detection in New Southgate
Wondering about the flat roof membrane at a property in New Southgate? You can book electronic leak detection in New Southgate and across Greater London, with plain-English findings.
- Stains far from any visible defect
- Leaks through a flat roof with no obvious cause
- Patched roofs that still leak
Do you need electronic leak detection in New Southgate?
Holes in a membrane often come from feet, tools or debris. Many are tiny but water still finds them.
A survey can pick up problems such as:
- Failed seams and laps
- Holes around roof penetrations
- Leaks through a covered membrane
- Water coming in under a flat roof
Shop and office owners around Grand Arcade may find that outlets and upstands on commercial flat roofs are the places to check before trouble starts.
Choosing a roof surveyor
- How they plan to inspect the roof safely
- Whether VAT is added on top
- Their track record with similar roofs
- Whether you can ask questions once you have the report
How electronic leak detection works in New Southgate
Electronic leak detection, or ELD, finds holes in flat roof waterproofing membranes. It works with an electrical current which can only get through the membrane at a breach. That lets us locate holes that are too small to see so your roofer knows exactly where to repair. The results come in a report with photos. Typical surveys look at damage from equipment installers and leaks at pipes, outlets or fixings, across green roofs, liquid-applied waterproofing and flat roof membranes.
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, each with its own weak points. Which one is on a roof in New Southgate shapes how it is checked. Older flat roofs are often felt or asphalt, newer ones rubber or GRP.
The report is written in plain words, so it makes sense without any roofing background. Each point is backed by a photo where possible.
- Where
- New Southgate (N11, N10, N14)
- Region
- Greater London
- Price
- Quoted for your roof
- Reports
- A written report with photos, by email
- Appointments
- Weekdays, Saturdays and Sundays
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
DIY checks: what’s safe
A lot can be seen from ground level. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Never climb onto the roof to look.
It helps to keep a record: when leaks happen, ground-level photos and any past roof work. Send it with your enquiry, as it helps us focus the survey.
What a survey costs
Prices always include VAT. What changes the price is:
- Commercial roofs and larger buildings
- How complicated the roof is, with its valleys, chimneys and parapets
- Any need for thermal images or a drone flight
- How many separate roofs there are, like extensions, dormers and garages
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Booking your survey
Getting the details right at the start saves time. It is useful to include:
- Any deadline, like an exchange date
- Where any leaks, stains or damp patches show inside
- Why you want a survey: buying, a leak, a storm or new work
- Pictures of the roof from a safe spot, if you have them
Buyers should book once an offer has been accepted, so there’s time to use the report before exchange. For any other survey, just phone 07833 053749 or drop us an email when you’re ready.
Nearby places to New Southgate
More services for New Southgate
What we can’t see
Our survey is not a RICS Level 2 or Level 3 survey, a structural engineer’s report or an asbestos survey. It also has these limits:
- Fixing the holes we find
- Leaks from plumbing or windows
- How wet the insulation is
Not sure which survey suits your roof? You can call 07833 053749 or send us an email and we will tell you before you book. What our survey covers.
What we check
- Flat roof membranes
- Green roofs
- Roof terraces and balconies
- Single-ply roofs
- Commercial flat roofs
- Liquid-applied waterproofing
Local flat roofs in New Southgate
The wider area around New Southgate has a long history of building, with Heath Hall about 2.9 miles south-west. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead. Outer London has plenty of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, frequently with hipped roofs in clay or concrete tiles. If your home in New Southgate is one of them, bay roofs, hips and later dormers each have their own details. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
Anyone responsible for a site like St Paul's CofE Primary School N11 will know that large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly. The streets around a church such as St Paul's Church are often among the oldest in a place, and if you own one of the older houses nearby, the flat roofs on later extensions tend to wear out long before the main roof.
New Southgate is about 2 miles north-east of Finchley, in Greater London. Wherever you are in New Southgate, we can come and survey your property, on a weekday, Saturday or Sunday. Our area takes in places right across Greater London. There is also a page for London.
We survey roofs across the N11, N10 and N14 postcode area for electronic leak detection and the streets around it. If you need electronic leak detection at a property on High Road, Orion Road and Atlas Road or anywhere close by, we can survey it. You’ll find New Southgate on the A1003 and A1110, which makes it simple to reach. If you are just outside New Southgate, we cover Friern Barnet (1 mile west), Arnos Grove (1 mile east), Bounds Green (1 mile south-east), Brunswick Park (1 mile north) and Southgate (1 mile north). We also work in nearby towns such as London (8 miles south), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (6 miles south) and Shoreditch (7 miles south-east).
Local landmarks in New Southgate
Around New Southgate, our work takes us to homes and buildings near Friern Barnet School, Ming-Ai and The Ranelagh pub. Other local landmarks include O. R. Tambo Recreation Ground (0.9 miles south-east) and Francis Skaryna Belarusian Library and Museum (1.8 miles west). There’s a railway station in New Southgate itself: New Southgate station. Nearby you will also find Grand Arcade (1.5 miles west) and Broomfield House Museum (1.1 miles east). Not far away are Barfield Allotments Nature Park and Highgate Hill.
New Southgate: your questions answered
Do you cover New Southgate?
We do. The survey and report are the same in New Southgate as anywhere else, and visits run on weekdays and weekends.
How do I find out if my home in New Southgate is listed?
Start with Historic England’s list for listing and your council for conservation areas. It is worth checking before planning roof work, as both can affect what’s allowed.
Will you go up on the roof?
Only when it is safe. Safe viewpoints, the loft space and a drone where applicable cover most of what’s needed, and the report notes anything we couldn’t see.
Can you inspect my roof with a drone?
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.
Which method do you use?
We choose the method that suits the roof. You will know which method we plan to use before we start.
How is ELD priced?
We quote for each roof individually. Tell us about the roof and where it leaks. Just ring 07833 053749 or email us for a quote.
Does someone need to be in?
Someone needs to let us in if we are looking inside or in the loft. We will talk about access when booking.
What we do, step by step
Photos are taken throughout the visit, so the report shows exactly what we saw. We take close-ups from wherever is safe. A typical visit takes a time that depends on the size of the roof and how it’s built, and we’ll give you a guide when quoting. In New Southgate, visits are available on weekdays and at weekends. London parking is often by permit or pay-and-display, so it’s useful to know what’s near you, and to clear a path to the loft hatch. Upstairs rooms at the back are useful too, as they often give the best view of a rear addition.
- You tell us 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.
- A report with photos shows where each breach is.
Preparing for the visit
- Check pets are kept safely away
- Show us where any leaks or stains appear
- Have any questions written down, so nothing gets missed
How to book
For a price for electronic leak detection in New Southgate, call 07833 053749 or send us an email. The address, the type of property and what you want to find out help us give you an accurate price.
Related advice
What we look for on each type of roof
Green and ballasted roofs
Roofs with planting or ballast hide the membrane. Testing may still be possible but it depends on the layers.
EPDM rubber roofs
EPDM is a long-lasting flat roof membrane, but punctures and seam failures still happen.