Greater London · London and the South East
North Cheam Electronic Leak Detection
Electronic leak detection to pinpoint holes in flat roof membranes for North Cheam, from an experienced roof surveyor. You get a clear written report with photos.
- Holes around roof penetrations
- Punctures from foot traffic or tools
- A flat roof leak that cannot be traced
Different roofs, different checks
Bituminous membranes
Bituminous felt and modified bitumen membranes are common. The build-up decides which method will work.
Single-ply membranes
Single-ply can be punctured by tools or fixings. ELD can locate them.
Electronic leak detection in North Cheam
Some flat roofs can’t be tested electronically. Some membranes conduct electricity themselves and some roofs do not have a suitable layer beneath the membrane. If your roof isn’t suitable, we’ll tell you before any testing. Any details you have about the membrane and build-up help us decide, like drawings or specifications. It saves a wasted visit. We survey commercial flat roofs, flat roof membranes and green roofs, and people most often book us about holes around roof penetrations and breaches hidden under paving or planting.
Water getting through a flat roof in London can travel under the covering and appear some way from the hole. Outlets, upstands against parapet walls and joins with the main roof are frequent culprits. In a block or conversion in North Cheam, the flat roof is frequently a shared part of the building.
You can share the report with anyone who needs it: your solicitor, the seller, your insurer, a roofer or the building’s managing agent, whichever applies.
- Place
- North Cheam (SM3, KT4, SM1)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- When we survey
- Weekdays, Saturdays and Sundays
- Cover
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Electronic leak detection around North Cheam
About 1 mile south lies Nonsuch Mansion, a reminder of how long the area around North Cheam has been built on. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and any change of roofing material on a listed home needs checking with the council first. Outer London has lots 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 North Cheam is one of them, bay roofs, hips and later dormers each have their own details. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere.
Shop and office owners around The Ashley Centre may find that the flat roofs over shops and commercial units are worth checking before a leak, not after. The streets around a church such as St Oswald Church are often among the oldest in a place, and if your home is one of the older ones nearby, flat-roofed rear additions and dormers added over the years are worth checking.
North Cheam is about 3 miles north-east of Epsom, in Greater London. If you are in North Cheam, booking works exactly as it does anywhere else: get in touch, agree the price and pick a day. Our area takes in places right across Greater London, from the larger towns to small villages. For surveys nearby, see our London page.
Surveys in SM3, KT4 and SM1 work the same way as everywhere else we cover. You’ll find streets such as Glyn Road, Covey Road and Lloyd Road, all of which we cover. Nearby, we also carry out electronic leak detection in Cuddington (1 mile south-west), Lower Morden (1 mile north), Sutton Common (1 mile north-east), Stoneleigh (1 mile south-west) and Morden (2 miles north). Larger places within reach include London (10 miles north-east), City of Westminster (10 miles north), Marylebone (11 miles north), Kensington (9 miles north), St Pancras (12 miles north) and Shoreditch (12 miles north-east).
Landmarks near North Cheam
We work in homes and buildings around The Nonsuch Inn, Sutton College of Learning for Adults and Nonsuch Park and the streets around them. For rail, the closest station is West Sutton station, roughly 0.8 miles south-east. Well-known places in the area include Chessington Castle Hill (3.2 miles west) and St. Anthony's Hospital (0.6 miles north). For a walk, there’s Henman Hill and Derwent Floodwash.
Useful tips for North Cheam property owners
There is plenty you can do without going near the roof. Here’s what helps most:
- Don’t leave water getting in
- Keep outlets clear of debris
- Have roof specifications to hand
- Avoid repeated repairs without finding the cause
If anything in the report isn’t clear, ask us. We will explain what was found and what it means.
Don’t leave a flat roof leak running. Water under a membrane can spread.
Leave it or get it looked at?
Opening up a roof to hunt for a leak is disruptive. Electronic testing finds the hole first so your roofer knows where to work. In North Cheam, as across London, an overflowing gutter soaks the wall below, which can lead to damp inside. A small blockage left for a few winters becomes a damp problem.
Every price we give includes VAT. We quote electronic leak detection for each roof, as the method and time depend on the roof. We confirm the exact price before booking.
Why choose Independent Roof Survey in North Cheam
- Drone and thermal imaging surveys available
- More than 20 years surveying roofs
- 98% of customers satisfied
- Independent findings on the roof’s condition
Take a look at how roof surveys are priced or our case studies.
When to book a survey in North Cheam
Seams are a common weak point in flat roof waterproofing. A gap that is hard to see can let water in long before anyone notices.
Problems we come across often include:
- New roofs to check before paving or planting
- Stains far from any visible defect
- Leaking laps in the waterproofing
- Leaks through a flat roof with no obvious cause
Take a building like Cheam Park Farm Primary Academy: large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
What to check before booking
- Which parts of the roof they’ll actually see
- Whether you get a written report with photos
- What happens after the report arrives
- What the survey won’t cover
FAQs for North Cheam
How do I find out if my home in North Cheam is listed?
Check Historic England’s online list first, then ask the council about conservation areas and any Article 4 direction. The answer matters most when a change of material is on the cards.
Do you carry out roof surveys in North Cheam?
Yes. We work right across London and the South East, and North Cheam is part of that. Just phone 07833 053749 or use the contact form and let us know about the property.
Do you survey on Saturdays and Sundays?
Visits run seven days a week in the daytime, which suits people who work during the week. Just say which days work for you.
Does the report include photos?
Yes. The report includes photos of what we found, so you can see each point for yourself.
How long does electronic leak detection take?
Testing typically takes a time that depends on the roof’s area and construction, which we set out in the quote.
How experienced are you?
We have completed more than 5,000 surveys, over more than 20 years, and 98% of customers are satisfied.
What is electronic leak detection?
The waterproofing membrane normally stops an electrical current, so wherever there’s a hole, it passes through. That lets us find breaches that are too small to see.
What we cannot see
It helps to know what a survey won’t do before booking:
- Build-ups without a suitable layer below
- Repairing the breaches (that is for your roofer)
- The extent of water in the insulation
Not sure which survey suits your roof? You can call 07833 053749 or drop us an email and we’ll tell you before you book. What our survey covers.
What this survey covers
- Commercial flat roofs
- Roof terraces and balconies
- Single-ply roofs
- Green roofs
- Flat roof membranes
- Liquid-applied waterproofing
What we do, step by step
It helps to start with what’s prompted the survey: buying, a leak, storm damage, new work or just wanting to know where things stand. It helps us focus on what matters most to you. The visit normally takes a time that depends on the size of the roof and how it’s built, which we set out in the quote. Many London properties are flats or terraces with no 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.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- The roof is assessed to see if electronic testing will work on it.
- The method depends on the membrane and what sits above and below it.
- The roof is tested and any breaches are located.
- We send a report with photos of each breach so your roofer can repair it.
Before the survey
- If it isn’t your property yet, arrange access through the agent
- Keep pets in another room
- Show us where any leaks or stains appear
Booking a survey
Most bookings start with a short call: phone 07833 053749 or drop us an email. You will have a price before anything is arranged.