Greater London · London and the South East
Electronic Leak Detection in Thornton Heath
Need electronic leak detection in Thornton Heath? We can help, with findings in writing and pictures to back them up. Weekday and weekend visits available.
- Leaks through a flat roof with no obvious cause
- Patched roofs that still leak
- Holes left by work on the roof
What electronic leak detection looks like in Thornton Heath
Historic houses such as Kingswood House, about 2.4 miles north-east, show how far back building in the area around Thornton Heath goes. If your house is among the older ones, 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. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere.
If you run a business near Centrale Croydon, a flat roof over a business is out of sight and out of mind until it leaks. For site and facilities teams at buildings such as Winterbourne Junior Girls' School, ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. For an older house near a landmark such as Church of St Stephen, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof.
Thornton Heath is about 7 miles south of London, in Greater London. If you are in Thornton Heath, booking works exactly as it does anywhere else: a call or an email, a price, then a date. Our area takes in places right across Greater London. Our London page covers surveys nearby.
Every address in CR7, SW16 and SE25 is within our area for electronic leak detection, from the main roads to the quietest streets. Whether your property is on Ena Road, Elm Road and Mayo Road or anywhere close by, we can survey it. Thornton Heath is on the A23 and A212, so it’s easy for us to get to. We also cover the places around Thornton Heath: Norbury (1 mile north), Pollards Hill (1 mile north), Mitcham (2 miles west), Hackbridge (2 miles west) and Eastfields (2 miles west). We also work in nearby towns such as London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (8 miles north-west), St Pancras (9 miles north) and Shoreditch (9 miles north).
Local landmarks in Thornton Heath
In Thornton Heath, that means homes and buildings near The Archbishop Lanfranc School, Prince George pub and Grangewood Park, among other places. Thornton Heath has its own railway station: Thornton Heath station. Well-known places in the area include Centrale Croydon (1.7 miles south) and Croydon University Hospital (0.7 miles south). Not far away are Biggin Wood and Duppas Hill.
How electronic leak detection works in Thornton Heath
You get a report showing the location of each breach, with photographs. It tells your roofer exactly where to repair rather than guessing. We do not estimate repair costs; that’s for your roofer to price. A retest after repairs can check the work if the build-up allows. You get a written report with photos. Typical surveys look at breaches around outlets and penetrations and new membranes needing a check before handover, on commercial flat roofs, single-ply roofs and flat roof membranes.
Commercial and residential blocks across London frequently have big flat roofs with plant, rooflights and access walkways. Each pipe, upstand and fixing through the covering is a possible weak point. In Thornton Heath, roof access is agreed with the building manager or owner beforehand. Plant bases, rooflights and cable entries are all places where water can get in.
You can share the report with anyone who needs it: your solicitor, the seller, your insurer, a roofer or the building’s managing agent.
- Where
- Thornton Heath (CR7, SW16, SE25)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- Survey days
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Phone
- 07833 053749
- Page updated
- 27 October 2026
What a survey costs
A few things affect what a survey costs:
- Whether it’s a home or a commercial building
- The number of roofs, including extensions and garages
- Height and safe access
- Chimneys, valleys, parapets and other details
Every price we give includes VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You’ll know the price for your roof before you book.
Booking your survey
The more you tell us, the easier it is to price the survey. When you contact us, tell us:
- When you need the report by
- Pictures of the roof from a safe spot, if you have them
- Where the property is, with the postcode
- Anything about access we should know
Photos help, if you have them. Pictures from the ground or a window are fine. To get started, phone 07833 053749 or drop us an email.
Roof by roof
Liquid-applied waterproofing
Testing a liquid-applied roof depends on what’s beneath the coating.
EPDM rubber roofs
EPDM is a long-lasting flat roof membrane, but punctures and seam failures still happen.
How it works
It helps to start with what’s prompted the survey: a purchase, a leak, a storm, new work or simply peace of mind. It helps us focus on what matters most to you. Most visits take a length of time set by the size of the roof and how it’s built, which we’ll explain when we quote. Surveys in Thornton Heath can be booked for any day of the week. It helps if you can point us to a visitor permit or a nearby bay, and to clear a path to the loft hatch. Upstairs rooms at the back are useful too, as they frequently give the best view of a rear addition.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We check that the membrane and build-up suit electronic leak detection.
- The testing method is chosen to suit the membrane and build-up.
- The roof is tested and any breaches are located.
- We send a report with photos of each breach so your roofer can repair it.
Preparing for the visit
- Gather any invoices or paperwork from past roof work
- For flats, make sure roof access has been agreed
- Point out any leaks or damp patches
Arrange a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, phone 07833 053749 or use the contact form with the address and the days you’d prefer.
Read more
Why act early in Thornton Heath
Leaks left running can wet the insulation and deck. Finding the breach sooner limits that. Any roof job in Thornton Heath means planning around parking, neighbours and access. Knowing what’s needed early gives you time to plan it calmly.
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.
Why book us in Thornton Heath
- Insured for professional indemnity and public liability
- Drone flown under a CAA Flyer ID and Operator ID
- Drone and thermal imaging surveys available
- 5,000+ roofs surveyed
Take a look at what a roof survey costs or our case studies.
Practical tips
Getting the most from electronic leak detection starts before we arrive and carries on afterwards. Tips:
- Keep foot traffic on flat roofs to a minimum
- Do not leave water getting in
- Keep outlets clear of debris
- Record dates and spots where water appears
Wet insulation may need attention after a leak. That’s something to discuss with your roofer and other checks can help judge it.
Clear flat roof outlets regularly. Standing water puts more pressure on any weak point.
Nearby places to Thornton Heath
Also in Thornton Heath
Checking the roof from ground level
Your own check is a good start, but it isn’t a survey. You will not see flashings, valleys or the backs of chimneys properly from the ground.
Look up at the roof after a storm, from ground level: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Do not go up yourself.
Questions from Thornton Heath
Will parking be an issue for a roof survey in Thornton Heath?
Parking in Thornton Heath, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Does a conservation area affect roof work in Thornton Heath?
For listing, use Historic England’s list; for conservation areas, ask the council. It matters most if you’re planning to re-roof in a different material.
Can every flat roof be tested?
ELD does not suit every roof. Some membranes conduct electricity, and some build-ups lack a suitable layer below. If your roof will not work, we will say so at the start.
Do you survey roofs on blocks of flats?
Yes, once whoever controls the roof agrees access. On a shared roof we can only inspect the parts we’re allowed to reach, and the report makes that clear.
Will you check the loft?
Where it is relevant to the survey and there’s safe access, yes. Please clear anything stored under the hatch, and if the loft can’t be reached safely, the report says so.
Are you insured?
We’re covered by professional indemnity and public liability insurance.
Which days do you carry out surveys?
We carry out surveys on weekdays, Saturdays and Sundays. To find a day that suits you, phone 07833 053749 or email us.