Greater London · London and the South East
Electronic leak detection in Merton, Greater London
Electronic leak detection in Merton, with over 20 years’ experience behind it. Every survey ends with a written report and photos.
- A flat roof leak that cannot be traced
- Breaches around outlets and penetrations
- Gaps at membrane joints
Electronic leak detection for homes and businesses in Merton
We carry out electronic leak detection on flat roofs in Merton and across London and South East England. A visit normally takes more time on a big roof than a small one, with the construction of the roof playing a part too. Every roof is quoted on its size and build-up. The results come in a written report with photos. If you’re worried about leaks through a covered membrane and failed seams and laps, a survey will tell you what’s going on, on roof terraces and balconies, single-ply roofs and flat roof membranes alike.
Commercial and residential blocks across London often have big flat roofs with plant, rooflights and access walkways. Each pipe, upstand and fixing through the covering is a possible weak point. In Merton, 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.
The report records the flat roof membrane as we found it on the day. That makes it useful now and a handy reference later.
- Where
- Merton (SW19)
- Wider area
- Greater London
- Prices
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- When we survey
- Weekdays, Saturdays and Sundays
- Insured
- PI and public liability insurance
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Electronic leak detection in Merton: local notes
Southside House, about 1.8 miles west, is one of the historic houses in the wider area around Merton. On older houses around here, roofs frequently carry the marks of earlier repairs, from replaced slates to new lead. In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Next to the main roofs there’s normally a flat roof somewhere, whether on an extension, a garage or a commercial unit.
Landlords with a home close to Haydons Road station may find that flat roofs on let property tend to be checked only when they fail, which is the costly way round. If yours is one of the older homes in the streets near St John The Divine, flat-roofed rear additions and dormers added over the years are worth checking.
Merton is about 1 mile south-east of Wimbledon, in Greater London. In Merton, as across Greater London, every roof gets the same careful survey. Our Greater London coverage includes Merton and the places around it. London is in our area too.
We cover every part of the SW19 postcode area for electronic leak detection and the streets around it. Local streets include High Path, Pincott Road and Hayward Close, all of which we cover. You will find Merton on the A24, so it’s easy for us to get to. Nearby, we also carry out electronic leak detection in Merton Abbey (1 mile east), South Wimbledon (1 mile north-west), Colliers Wood (1 mile east), Tooting Bec (1 mile north-east) and Summerstown (1 mile north). Within a short drive, we also cover London (7 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north) and Shoreditch (9 miles north-east).
Near you in Merton
Around Merton, our work takes us to homes and buildings near The Nelson Arms, Wimbledon School of Art and Wandle Park and the streets around them. The nearest railway station is Haydons Road station, roughly 0.8 miles north. A little further out are Southside Wandsworth (2.8 miles north) and St George's Hospital (1.1 miles north-east). The countryside around Merton includes Henman Hill and Merton Park Green Walks.
What else we do in Merton
Landlords, agents and block managers in Merton
Roof problems in a rented home affect tenants as well as the building. A survey shows what needs attention, so you can plan the work.
Buyers’ agents can book surveys on behalf of their clients. Reports are emailed, so they’re easy to pass on, photographs included.
Before and after the survey
These tips come from what we see on roofs every week:
- Share any drawings of the roof
- Record dates and spots where water appears
- Do not leave water getting in
- Check new waterproofing before handover
File the report with your roof paperwork. It shows the condition of the membrane on that date.
Don’t leave a flat roof leak running. The longer water gets in, the more insulation and decking can be affected.
Your questions about electronic leak detection in Merton
Does a conservation area affect roof work in Merton?
We can’t confirm that for you, but Historic England’s list and your council can. A change of roofing material may need consent in either case, and councils can also use Article 4 directions.
Is Merton in the area you cover?
Yes, Merton is within the area we cover. We survey roofs across London and South East England. You can call 07833 053749 or use the contact form with the address and a few details.
What’s in the report?
It sets out what we found, why it matters and what we recommend, backed by photos. Anything we couldn’t see safely is noted too.
Do you take photos of the roof?
Yes. Photographs are part of every report, so you can see exactly what each finding refers to.
How does ELD work?
The waterproofing membrane normally stops an electrical current, so wherever there is a hole, it passes through. That lets us find breaches that are too small to see.
How do I book a survey in Merton?
Just phone 07833 053749 or send us an email with the address. We will ask a few questions, confirm the price and agree a date, weekday or weekend.
Is it the same as a RICS Level 2 or Level 3 survey?
No. We check the roof, not the whole building, and it is not a RICS Level 2 or Level 3 survey. Many buyers have both.
How the survey works
Safety comes first on every visit. Everything that can be seen safely is inspected, and anything we can’t see is noted in the report. The survey normally takes a length of time set by the roof’s area and construction, and we’ll give you a guide when quoting. Surveys in Merton 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 often give the best view of a rear addition.
- We agree the area to be tested.
- We get the roof ready for testing.
- Testing runs across the agreed area.
- We mark the breach locations in our records.
- You receive the results to pass to your roofer.
Getting ready for the survey
- Have keys ready for side gates, garages or roof access doors
- If you’re buying, check with the agent that we can get in
- Tell us about parking before the day
Book a survey
For a price for electronic leak detection in Merton, call 07833 053749 or email us. A few details about the property and the roof help us give you an accurate price.
Related advice
Should I look at the roof myself first?
After heavy rain, check ceilings and the tops of walls for new stains. Take a photo and write down when you saw it, which helps when we look at the roof.
Watch the gutters in a downpour, from a window or the ground. Water spilling over the edge can point to a blockage or a sagging run.
How we price electronic leak detection
A few things affect what a survey costs:
- The use of thermal imaging or a drone
- The roof’s overall size
- Height and safe access
- The number of roofs, including extensions and garages
To find out what your survey will cost, phone 07833 053749 or drop us an email and let us know about the roof. The price is agreed before a date is set.
Getting in touch
To price your survey accurately, we will ask about:
- The style of property, from a terrace to a block
- Why you want a survey: buying, a leak, a storm or new work
- When you need the report by
- The property’s address and postcode
If you have photos of the roof, send them over. Take them safely from ground level or a window. To get started, phone 07833 053749 or send us an email.
What we are asked to look at in Merton
Repeated leaks after repairs suggest the real breach hasn’t been found. ELD can locate the breach more precisely.
A survey can pick up problems such as:
- Gaps at membrane joints
- Waterproofing to test before it’s covered
- Holes around roof penetrations
- Repairs that haven’t stopped the leak
Controlled parking zones are common in London, so mention any permit rules for Merton, along with any off-street space.
What to check before booking
- What follow-up you get after the report
- Whether VAT is added on top
- Whether any drone flown is registered with the CAA
- How long the report takes to arrive