Greater London · London and the South East
Electronic leak detection in St Ann's, Greater London
Electronic leak detection to pinpoint holes in flat roof membranes across St Ann's, with drones and thermal imaging where they help. Get in touch for a price.
- New membranes needing a check before handover
- Repairs that haven’t stopped the leak
- Leaks at pipes, outlets or fixings
DIY checks: what’s safe
Look up at the roof after a storm, from the ground: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Leave anything above ground level to a survey.
What you can’t do safely is get up close. Roofs are fragile and slippery, and a fall can be serious. That part is for a survey.
Electronic leak detection in St Ann's
Electronic leak detection works on many flat roof membranes over offices, units, blocks of flats and homes. It helps trace a leak you already have or check a new membrane before handover. We quote for each roof based on its size and build-up. We can test on weekdays and at weekends when conditions allow. Just ask about your roof. We survey commercial flat roofs, green roofs and liquid-applied waterproofing, and the problems we’re asked to look at most are waterproofing to test before it’s covered and leaks at pipes, outlets or fixings.
Water getting through a flat roof in London can travel under the covering and appear some way from the hole. Upstands against parapets, outlets and the edge where flat meets pitched are common entry points. In a converted house in St Ann's, the roof above may belong to the building rather than one flat.
The report is written in plain words, so you do not need to be a roofer to follow it. Each point is backed by a photo where possible, with the urgent items made clear.
- Where
- St Ann's (N15, N4, N16)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insured
- PI and public liability insurance
- Call
- 07833 053749
- Updated
- 27 October 2026
Your questions about electronic leak detection in St Ann's
Is St Ann's in the area you cover?
Yes, St Ann's is one of the places we work. Every survey there gets the same written report with photos.
Can parking be tricky for a visit in St Ann's?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you survey in bad weather?
Light rain is normally fine; heavy rain and wind are different. In high wind or heavy rain, a drone can’t fly and access may not be safe, and we’d agree another day.
Can you give me structural calculations?
No. Our survey is not a structural engineer’s report. We will recommend an engineer if we see signs that call for one.
Do you carry professional indemnity insurance?
Professional indemnity and public liability insurance cover our surveys. If you need details for a managing agent or a building owner, just ask.
Does electronic leak detection work on all membranes?
Not every roof is suitable. Some membranes conduct electricity and some roofs lack the layer the test needs. If your roof won’t work, we’ll say so before testing.
Do you test for asbestos?
No. We do not carry out asbestos surveys or testing. We flag materials that could contain asbestos, such as cement sheets or soffits on pre-2000 buildings and suggest a specialist asbestos surveyor checks them before any work.
Common roof problems in St Ann's
Roofs covered with paving, ballast or planting hide the membrane. ELD can work on some covered roofs, depending on the build-up.
A survey makes sense if you’ve noticed:
- Leaks at pipes, outlets or fixings
- New roofs to check before paving or planting
- Leaks under green or ballasted roofs
- Water coming in under a flat roof
Controlled parking zones are common in London, so mention any permit rules for St Ann's, along with any off-street space.
Before booking any roof surveyor
- How they’ll see the roof: from the ground, the loft, the roof or by drone
- What experience they bring
- What exactly goes into their report
- Whether the price includes VAT
What this survey cannot tell you
Our findings are based on what we can see safely on the day, so some things are outside what a survey can do:
- Repairing the breaches (that’s for your roofer)
- How wet the insulation is
- Leaks from plumbing or windows
If you are not sure which survey you need, ring 07833 053749 or drop us an email and we’ll give you a straight answer before you book. The full list of what we check.
Roof types and parts we check
- Liquid-applied waterproofing
- Commercial flat roofs
- Roof terraces and balconies
- Green roofs
- Flat roof membranes
- Single-ply roofs
How it works
Time on site depends on the size and shape of the roof, but as a rough guide the survey takes longer on a large roof than a small one, with the construction of the roof playing a part too. If you have questions on the day, just ask. London terraces rarely offer a view of the whole roof from one spot, so a visit in St Ann's 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.
- We start with what you know about the roof and the leak.
- The roof is assessed for suitability first.
- The test method is chosen to suit the roof.
- The membrane is tested and breaches are found.
- A report with photos shows where each breach is.
Getting ready for the survey
- Have any paperwork from past roof work to hand
- Leave side gates unlocked
- Agree roof access with the managing agent if it’s shared
Book a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To find a date that works for you, ring 07833 053749 or drop us an email with the address and the days you’d prefer.
Related advice
Flat roofs in St Ann's
Close to the centre of London, a great many houses are Victorian or Edwardian terraces, many of them roofed in Welsh slate. Many have butterfly roofs draining to a central valley gutter, with parapet walls and gutters hidden behind them. Lead flashings, party-wall upstands and shared chimney stacks are typical of these houses, if yours is one of them. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops. With Bruce Castle about 1.3 miles north, St Ann's sits in an area with a long building history. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs.
If your home is one of the older ones in the streets near St Ann's Church, the joins between later flat roofs and the old walls are where problems typically start. For businesses in and around places such as The Mall Wood Green, a flat roof over a business is out of sight and out of mind until it leaks.
St Ann's is about 2 miles north-west of West Hackney, in Greater London. St Ann's is part of the area we cover and the surrounding area across London and South East England. Across Greater London, we cover St Ann's and the places around it. You can also see our page for London.
Surveys in N15, N4 and N16 work the same way as everywhere else we cover. We cover properties on Ida Road, Elmar Road and Grove Road and the roads around them. Nearby, we also carry out electronic leak detection in West Green (1 mile north-west), Seven Sisters (1 mile east), South Tottenham (1 mile east), Harringay (1 mile west) and Tottenham Green (1 mile north-east). Within a short drive, we also cover London (6 miles south), City of Westminster (5 miles south-west), Marylebone (5 miles south-west), Kensington (8 miles south-west), St Pancras (4 miles south) and Shoreditch (4 miles south).
Local landmarks in St Ann's
We work in homes and buildings around Church of St Andrew, No.8 Seven Sisters pub and Moselle Upper School. Other local landmarks include Chestnuts Park (within half a mile west) and Park View School (0.5 miles north-west). St Ann's has its own railway station: Seven Sisters station. Other landmarks nearby include City of London Maternity Hospital (1.7 miles south-west) and The Mall Wood Green (1.4 miles north-west). Not far away are Railway Fields and Hollow Pond.
Prices for electronic leak detection in St Ann's
All our prices include VAT. What changes the price is:
- Features like valleys, chimneys, dormers and parapets
- The type of building, from a house to a block or an office
- How tall the building is and how easy the roof is to see
- The roof’s overall size
For a price for your roof in St Ann's, ring 07833 053749 or send us an email with the address and some details. We will confirm the figure before booking.
What to tell us when you contact us
If you can, have these to hand when you get in touch:
- The address and postcode of the property
- Why you want a survey: buying, a leak, a storm or new work
- The kind of building and roof involved
- Pictures of the roof from a safe spot, if you have them
To book a survey, phone 07833 053749 or send us an email and let us know the address and what’s prompted the survey. You’ll know the price before anything is booked.
Also near St Ann's
Why get it checked now?
Some breaches are too small to see. Electronic testing can find breaches you cannot see by eye, on suitable membranes. In St Ann's, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: failed flashings and blocked valley gutters can send water into more than one home. Finding it early keeps the work smaller.
What a survey costs comes down to the roof itself: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. Electronic leak detection is quoted for your roof, because the method depends on the roof.
What you get with us
- An independent look at the roof
- Drone flown under a CAA Flyer ID and Operator ID
- Customer satisfaction of 98%
- Visits on any day of the week
See our cost guide or two real surveys.