Greater London · London and the South East
Electronic leak detection in Morden, Greater London
We carry out electronic leak detection in Morden and the rest of Greater London. We survey on weekdays and at weekends.
- Leaks through a flat roof with no obvious cause
- Stains far from any visible defect
- Leaks that return after repairs
How electronic leak detection works in Morden
Some flat roofs can’t be tested electronically. Some membranes conduct electricity themselves, and some build-ups lack the layer the test needs below the membrane. If your roof isn’t suitable, we will tell you before any testing. Telling us what you know about the roof’s membrane and layers helps, including drawings, specifications or the roofer’s paperwork. It avoids arranging a test that can’t give results. We’re often asked to look into leaks that return after repairs and breaches around outlets and penetrations, on roof terraces and balconies, flat roof membranes and liquid-applied waterproofing.
On a London roof terrace or a flat roof over a back addition, water often runs under the covering before it shows. Outlets, upstands against parapet walls and joins with the main roof are frequent culprits. In a converted house in Morden, the roof above may belong to the building rather than one flat.
Nothing in the report is left vague: where something needs attention, it says so plainly.
- Place
- Morden (SM4, SM3, SW20)
- Region
- Greater London
- Price
- Quoted for your roof
- Your report
- A written report with photos, by email
- Survey days
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Updated
- 27 October 2026
Should I look at the roof myself first?
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. Don’t go up yourself.
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.
Also in Morden
What electronic leak detection looks like in Morden
Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, often with hipped roofs of clay or concrete tiles. Bay roofs, hip ridges and dormers from later loft conversions are the details that set these houses apart. Next to the main roofs there is typically a flat roof somewhere, whether on an extension, a garage or a commercial unit. Historic houses such as Southside House, about 1.9 miles north-west, show how far back building in the area around Morden goes. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and the council can say whether a home is in a conservation area.
For an older house near a landmark such as St Lawrence Church, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof. Controlled parking zones are common in London, so mention any permit rules for Morden, along with any off-street space. Anyone responsible for a site like Morden Primary School will know that schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Morden is about 2 miles south of Wimbledon, in Greater London. We carry out electronic leak detection in Morden for houses, flats, blocks and commercial buildings, with a written report and photographs every time. Morden is one of the towns and villages in Greater London we cover. Our London page covers surveys nearby.
Here we cover the SM4, SM3 and SW20 postcode area for electronic leak detection. You will find streets like London Road, Epsom Road and Holne Chase, and we cover them all. Being close to the B279, Morden is easy for us to reach. Neighbouring places we cover for electronic leak detection include Lower Morden (1 mile south-west), Sutton Common (1 mile south-east), North Cheam (2 miles south), Worcester Park (2 miles south-west) and Stoneleigh (3 miles south-west). Within a short drive, we also cover London (9 miles north-east), City of Westminster (9 miles north), Marylebone (9 miles north), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Landmarks near Morden
Around Morden, our work takes us to homes and buildings near Lord Nelson pub, Glenthorne High School and Cannon Hill Common. There is a railway station in Morden itself: St Helier station. A little further out are St. Anthony's Hospital (1 mile south-west) and Chessington Castle Hill (4.3 miles south-west). Not far away are Henman Hill and Morden Park (park).
Landlords, agents and block managers in Morden
Landlords, agents and building managers in Morden and across Greater London can book any of our surveys. For a price for a let property or a block, phone 07833 053749 or email us.
With a portfolio of properties, you can book surveys for several addresses. To arrange surveys for several addresses, ring 07833 053749 or drop us an email with the addresses.
Morden: your questions answered
Do you carry out roof surveys in Morden?
Yes, Morden is one of the places we work. The survey and report are the same in Morden as anywhere else, and visits run on weekdays and weekends.
Is my home in Morden listed or in a conservation area?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. Listed building consent is needed for changes that affect a listed building’s special interest, and conservation areas can limit changes of roofing material.
How soon will I get the report?
The Premium Survey report comes the same day, the Standard within 24–48 hours and the Basic within 48 hours. Each one is emailed.
Is this an asbestos survey?
No. We do not carry out asbestos surveys or testing. We flag materials that could contain asbestos, like cement sheets or soffits on pre-2000 buildings, and recommend a specialist asbestos surveyor checks them before they’re disturbed.
Can you test a green or ballasted roof?
Sometimes. The layers on top and the build-up below decide it and parts may need to be lifted. We talk this through first.
Do you look in the loft space?
If there’s a loft and safe access to it, yes. From inside, the underside of the roof frequently shows damp, staining or daylight that cannot be seen from outside.
How long will testing take?
Testing usually takes more time on a big roof than a small one, and the build-up of the roof makes a difference too.
How the survey changes by roof type
Green and ballasted roofs
Some layers may need lifting for testing. We explain what’s needed when we quote.
EPDM rubber roofs
Whether an EPDM roof can be tested depends on the membrane and build-up. We look at this first.
What affects the price in Morden
Prices vary from roof to roof, for these reasons:
- Whether thermal imaging or a drone is needed
- How many separate roofs there are, such as extensions, dormers and garages
- How complicated the roof is, with its valleys, chimneys and parapets
- Building height and the viewpoints available
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. We quote electronic leak detection for each roof, as the method and time depend on the roof.
What to tell us when you contact us
What helps most when you contact us:
- Where the property is, with the postcode
- The type of building and roof, such as pitched or flat
- What’s prompted the survey
- Any marks or damp showing indoors
If you have photos of the roof, send them over. Pictures from the ground or a window are fine. To get started, ring 07833 053749 or drop us an email.
Why act early in Morden
Repairs in the wrong place leave the leak in place. ELD shows the actual breach points. Behind a London parapet, a blocked gutter can sit full of water without anyone seeing it. When the stain finally shows, the damage underneath is often older than it looks.
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You will know the exact price before you book.
Why book with us
- Two decades and more of roof surveys
- Surveys seven days a week
- Plain-English reports with photos
- Drones and thermal imaging where it applies
See what a roof survey costs and what we found on two real jobs.
The survey, step by step
We don’t take risks to get a closer look. We inspect what can safely be seen, and if part of the roof cannot be seen, the report says so. The survey typically takes as long as needed for the roof’s area and construction, and we’ll give you a guide when quoting. Surveys in Morden can be booked for any day of the week. London parking is frequently by permit or pay-and-display, so it is useful to know what’s near you, and to clear a path to the loft hatch. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- We start by finding out what the roof is made of and where it leaks.
- We check that the membrane and build-up suit electronic leak detection.
- We pick the low-voltage or high-voltage method that suits the roof.
- We test the membrane and find where current is passing through it.
- We send a report with photos of each breach so your roofer can repair it.
Before we arrive
- Unlock side gates and any roof access doors
- Tell us about any leaks, stains or damp patches you know of
- Tell us about parking before the day
Book a survey
To arrange a survey, ring 07833 053749 or drop us an email and tell us the address and what’s prompted the survey. We’ll confirm the price before you book.