Greater London · London and the South East
Merton Park Electronic Leak Detection
Electronic leak detection in Merton Park, backed by more than 20 years’ experience. You get a clear report with photos.
- A flat roof leak that cannot be traced
- Damage from equipment installers
- Leaks under green or ballasted roofs
What a survey costs
All our prices include VAT. What changes the price is:
- The size of the roof
- Extensions, dormers and garages with roofs of their own
- Building height and the viewpoints available
- Whether thermal imaging or a drone is needed
The cost of a survey depends on the roof: its size, its height, how many sections it has 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 to tell us when you contact us
A little information up front helps. Please include:
- The style of property, from a terrace to a block
- Any stains, drips or damp patches you’ve seen indoors
- How the loft is reached, if there is one
- Pictures from the garden or a window, if you have them
Booking is simple: just call 07833 053749 or use the contact form, let us know about the property and we will explain which survey suits. We confirm the price before anything is booked.
Electronic leak detection in Merton Park
Electronic leak detection, or ELD, finds holes in flat roof waterproofing membranes. It works with an electrical current that passes through the membrane only where there is a breach. It can find holes too small to spot by eye so your roofer knows exactly where to repair. You get a written report with photos of each breach found. We’re frequently asked to look into waterproofing to test before it’s covered and breaches hidden under paving or planting, on liquid-applied waterproofing, single-ply roofs and green roofs.
Offices, shops and blocks of flats across London often have large flat roofs with plant, rooflights and walkways. Each pipe, upstand and fixing through the covering is a possible weak point. For a building in Merton Park, access is agreed with whoever manages the roof ahead of the visit. Plant bases, rooflights and cable entries are all places where water can get in.
The report is written in plain words, so it makes sense without any roofing background. Photos show what each point refers to, with the urgent items made clear.
- Place
- Merton Park (SW19, SW20, SM4)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Report
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
For landlords and managing agents
Landlords, agents and building managers in Merton Park and across Greater London can book any of our surveys. To discuss a property or a block, call 07833 053749 or email us.
We survey roofs for landlords and agents as well as homeowners. The report gives you a dated record of the flat roof membrane, with photos, useful for planning maintenance.
What electronic leak detection does not cover
A survey is a close look at the flat roof membrane, but it cannot do everything. The main limits are:
- Sections we can’t safely access
- Roofs whose membrane or build-up is not suitable
- Moisture spread under the membrane
If you are not sure which survey you need, phone 07833 053749 or email us and we will give you a straight answer. The full list of what we check.
Roofs we survey in Merton Park
- Single-ply roofs
- Green roofs
- Flat roof membranes
- Roof terraces and balconies
- Commercial flat roofs
- Liquid-applied waterproofing
DIY checks: what’s safe
During heavy rain, look at the gutters from the ground or a window. Water spilling over the edge can be a sign of a blockage or a gutter that has dropped.
Keep a simple record: when leaks happen, ground-level photos and any past roof work. Send it with your enquiry and it will help the survey.
What we do, step by step
We check the roof from outside and, where it’s relevant and there is safe access, from inside the roof space too. Inside, we look for staining, damp, gaps and signs of movement, as far as the space allows. The whole visit typically takes a length of time set by the roof’s area and construction, which we’ll explain when we quote. In Merton Park, as in much of London, a good many properties are flats or terraces without side access, so rear slopes are viewed from windows, the loft or, where a flight is allowed, by drone. If the building has a managing agent or access rules, let us know when booking.
- First, we confirm which roof areas are included.
- We get the roof ready for testing.
- We work across the roof with the test equipment.
- Each breach found is located and recorded.
- You receive the results to pass to your roofer.
Getting ready for the survey
- Gather any invoices or paperwork from past roof work
- Make a note of anything you’d like us to look at
- Agree roof access with the managing agent if it’s shared
How to book
Buyers should book once an offer has been accepted, so you have the findings in time to act on them before you exchange. Otherwise, simply call 07833 053749 or drop us an email whenever suits you.
Advice
Towns and villages near Merton Park
What else we do in Merton Park
Tips that help
Getting the most from electronic leak detection starts before we arrive and carries on afterwards. Some tips:
- Share any drawings of the roof
- Stay off the flat roof unless needed
- Record dates and spots where water appears
- Make sure trades protect the waterproofing
If we think the leak isn’t coming through the membrane, the report says so, with a suggestion of what to check next.
Consider testing a new membrane before it is covered. It’s easier to find holes before more layers are added.
Flat roofs in Merton Park
The wider area around Merton Park has a long history of building, with Southside House about 1.4 miles west. Older homes in the wider area often have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years. 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.
For businesses in and around places such as Southside Wandsworth, flat roofs over shops and units are easy to forget until water comes through a ceiling. If you let a flat or house near South Merton station, the flat roof over a let home is worth a look before it becomes a tenant complaint. For an older house near a landmark such as St Mary's Church, flat-roofed rear additions and dormers added over the years are worth checking.
Merton Park is about 1 mile south-east of Wimbledon, in Greater London. We cover Merton Park and the rest of Greater London, as part of our work across London and the South East. Across Greater London, we cover Merton Park and the places around it. London is in our area too.
Here we cover the SW19, SW20 and SM4 postcode area for electronic leak detection. If you need electronic leak detection at a property on Mina Road, Manor Road and Cecil Road or a nearby road, we can survey it. We also cover the places around Merton Park: Wimbledon Chase (1 mile west), Bushey Mead (1 mile west), Cannon Hill (1 mile south-west), Wimbledon (1 mile north-west) and Crooked Billet (1 mile north-west). Within a short drive, we also cover London (8 miles north-east), City of Westminster (7 miles north), Marylebone (8 miles north), Kensington (6 miles north), St Pancras (9 miles north-east) and Shoreditch (10 miles north-east).
Landmarks near Merton Park
Around Merton Park, our work takes us to homes and buildings near Wibbas Down Inn, Morden Hall Park and Wimbledon School of Art, among other places. The nearest railway station is South Merton station, roughly 0.5 miles south. Other landmarks nearby include St George's Hospital (1.6 miles north-east) and Southside Wandsworth (3.1 miles north). The countryside around Merton Park includes Merton Park Green Walks and Henman Hill.
FAQs for Merton Park
Do you cover Merton Park?
Yes, Merton Park is within the area we cover. We cover the whole of London and South East England. You can call 07833 053749 or use the contact form with the address and some details.
Is parking a problem for a survey in Merton Park?
It rarely stops a survey, but it’s worth planning. Tell us what parking is available nearby, and the visit is planned around it.
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 arrange electronic leak detection in Merton Park?
Just phone 07833 053749 or drop us an email with the address. After a few questions, we confirm the price and fix a day.
I live in a flat. Can you survey the roof?
Yes. A shared roof needs access agreed first, with whoever owns or manages the building. Let us know about it when you book and we’ll explain what’s needed.
Do you look in the loft space?
Yes, where the survey calls for it and there is safe access. We look for staining, damp, daylight and signs of movement.
Will you go up on the roof?
Not unless it’s 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.