Greater London · London and the South East
Electronic Leak Detection in Cheam
Electronic leak detection in Cheam, backed by more than 20 years’ experience. Every survey ends with a written report and photos.
- Holes left by work on the roof
- Patched roofs that still leak
- Water coming in under a flat roof
How the survey changes by roof type
Bituminous membranes
Bituminous felt and modified bitumen membranes are common. Whether ELD suits them depends on the build-up.
Liquid-applied waterproofing
Testing a liquid-applied roof depends on what’s beneath the coating.
Electronic leak detection in Cheam
Water can travel under a flat roof membrane before it shows inside. That makes leaks hard to trace by eye. Electronic leak detection tests the membrane itself and locates the breach. It is testing only and leave the repair to your roofer. On a suitable roof, it takes the guesswork out of finding the hole. The results then follow in a written report with photos. Common reasons to book are stains far from any visible defect and new membranes needing a check before handover, across liquid-applied waterproofing, flat roof membranes and commercial flat roofs.
Across London, flat roofs are everywhere, from back additions and dormers to roof terraces, blocks of flats and offices. They’re covered in felt, asphalt, EPDM rubber, GRP fibreglass or single-ply membranes, each with its own weak points. In Cheam, as anywhere in London, the right approach depends on what the roof is made of. Many older flat roofs are felt or asphalt, and many newer ones EPDM rubber or GRP.
After the visit, you get a written report with photos, emailed to you. It explains the condition of the flat roof membrane, the defects we found and what we recommend.
- Where
- Cheam (SM2, SM3, SM1)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Appointments
- Weekdays and weekends
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
What this survey can’t tell you
Before booking, it is worth knowing what a survey won’t do:
- Fixing the holes we find
- Parts of the roof covered by fixed equipment
- Some conductive membranes
If in doubt, ring 07833 053749 or use the contact form and we’ll recommend the right survey. The full list of what we check.
Roof types and parts we check
- Liquid-applied waterproofing
- Roof terraces and balconies
- Green roofs
- Flat roof membranes
- Single-ply roofs
- Commercial flat roofs
Also near Cheam
Other services in Cheam
What affects the cost of electronic leak detection
Several things affect the price of a survey:
- How complicated the roof is, with its valleys, chimneys and parapets
- The size of the roof
- Height and safe access
- Whether it’s a home or a commercial building
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. You’ll know the figure before booking.
What to tell us when you get in touch
If you can, have these to hand when you get in touch:
- Pictures from the garden or a window, if you have them
- The style of property, from a terrace to a block
- Access details, like a loft hatch or a shared roof
- Your timetable, such as an exchange date
We confirm the price for the job before you book, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. For a price for your roof, ring 07833 053749 or send us an email.
Cheam: your questions answered
Will parking be an issue for a roof survey in Cheam?
Typically it’s manageable with a little notice. Let us know what parking is available nearby, and the visit is planned around it.
Is Cheam in the area you cover?
Yes. Our area covers London and South East England, and Cheam is part of that. Just call 07833 053749 or drop us an email and tell us about the property.
What’s the best way to book?
To arrange a survey, call 07833 053749 or use the contact form with the address, the type of property and what’s prompted the survey. We will confirm the price and agree a day with you.
How many surveys have you done?
We have been surveying roofs for over 20 years and have carried out more than 5,000 surveys across London and South East England.
What is electronic leak detection?
ELD passes a small electrical current across the roof to locate holes in the membrane. The current only gets through where the membrane is breached so we can pinpoint it.
Do you carry out surveys on Saturdays and Sundays?
We carry out surveys seven days a week. To arrange a date, phone 07833 053749 or email us.
Will you repair the leak?
No, our part is finding the breaches. Your roofer uses the report to target the repair.
Flat roofs in Cheam
Outer London has plenty of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, frequently with hipped roofs in clay or concrete tiles. If your home in Cheam is one of them, bay roofs, hips and later dormers each have their own details. Mixed in with those pitched roofs are a good many flat ones, over rear extensions, dormers, garages and shops. With Nonsuch Mansion about 1 mile north-west, Cheam sits in an area with a long building history. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and a listed home or one in a conservation area may need consent for changes of material.
For a London address like Cheam, it is useful to know about controlled parking before the day. For site and facilities teams at buildings such as Glaisdale School, schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Cheam is about 1 mile south-west of Sutton, in Greater London. Anywhere in Cheam, we can come and survey your property, on a weekday, Saturday or Sunday. Our area takes in places right across Greater London, from the larger towns to small villages. Our London page covers surveys nearby.
Postcode districts we cover here for electronic leak detection: SM2, SM3 and SM1. Whether your property is on Wray Road, York Road and The Avenue or anywhere close by, we can survey it. Nearby, we also carry out electronic leak detection in Belmont (1 mile south-east), Cuddington (1 mile north-west), North Looe (1 mile south-west), North Cheam (2 miles north) and Nork (2 miles south). Within a short drive, we also cover London (12 miles north-east), City of Westminster (12 miles north), Marylebone (12 miles north), Kensington (11 miles north), St Pancras (13 miles north) and Shoreditch (14 miles north-east).
Around Cheam
We work in homes and buildings around Avenue Primary Academy, Howell Hill and Overton Grange School and the streets around them. The nearest railway station is Cheam station, about 0.6 miles north. Other landmarks nearby include The Ashley Centre (2.7 miles south-west) and Chessington Castle Hill (3.5 miles west). Not far away are Duppas Hill and Belmont Pastures.
What we do, step by step
On the day, we start by asking what you’ve noticed and what you need to know. After that, we check everything we can see safely, using the ground, windows, the loft and a drone where applicable. Most surveys take more time on a big roof than a small one, and the build-up of the roof makes a difference too. In Cheam, as in much of London, plenty of 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. Mention any building rules, key holders or managing agents when booking.
- First, you tell us about the roof build-up and where water is showing.
- We confirm whether the roof is suitable for electronic testing.
- The method depends on the membrane and what sits above and below it.
- The roof is tested and any breaches are located.
- You get a report showing where each breach is, for your roofer to repair.
Before the survey
- If you’re buying, let the agent know when we are coming
- Have any paperwork from past roof work to hand
- Make sure we can get to the back of the property
How to book
For a price for electronic leak detection in Cheam, call 07833 053749 or drop us an email. A few details about the property and the roof help us price the survey accurately.
Related advice
Signs you need electronic leak detection in Cheam
New membranes can have defects from installation. ELD on a new roof can show holes before they cause leaks.
Signs worth acting on include:
- Breaches around outlets and penetrations
- Water coming in under a flat roof
- Patched roofs that still leak
- Leaks under green or ballasted roofs
The streets around a church like Church of St Andrew are frequently among the oldest in a place, and if you own one of the older houses nearby, flat-roofed rear additions and dormers added over the years are worth checking.
Choosing a roof surveyor
- Do they have a CAA Flyer ID and Operator ID for drone work?
- Which viewpoints they use to see the roof
- How much experience they have with roofs like yours
- How long the report takes to arrive
What happens if roof problems are left?
Chasing a leak again and again is frustrating. A report showing the breach points gives your roofer a clear target. London’s older roofs frequently have bitumen felt underlay or none at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left alone, that means wet timbers and plaster, which is a far bigger job than the roof fault itself.
For a price for your roof in Cheam, phone 07833 053749 or email us with the address and some details. The price is agreed before a date is set.
Why us?
- Drone flown under a CAA Flyer ID and Operator ID
- An independent look at the roof
- Every finding written up with photos
- Thermal imaging and drone inspection where they help
Read our cost guide and what we found on two real jobs.