Greater London · London and the South East
Electronic Leak Detection in Tolworth
Electronic leak detection for homes and businesses in Tolworth. More than 5,000 surveys completed across London and South East England.
- Breaches around outlets and penetrations
- Failed seams and laps
- Breaches hidden under paving or planting
Tips from our surveys
A little preparation and a few simple habits help, both for the survey and for the roof itself. Our tips:
- Find the breach before more patching
- Use boards when working on the roof
- Limit access to the roof
- Don’t leave water getting in
Questions about the results are welcome. We can talk you through the findings.
Don’t leave a flat roof leak running. The longer water gets in, the more insulation and decking can be affected.
Electronic leak detection for homes and businesses in Tolworth
ELD is a way of pinpointing breaches in a flat roof’s waterproofing membrane. It works with an electrical current which can only get through the membrane at a breach. It can find holes too small to spot by eye, so your roofer can repair them. You get a written report with photographs of each breach found. If you are worried about new membranes needing a check before handover and damage from equipment installers, a survey will tell you what’s going on, whatever the roof.
Offices, shops and blocks of flats across London frequently have large flat roofs with plant, rooflights and walkways. Every penetration and upstand is a place where a membrane can fail. For a building in Tolworth, 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
- Tolworth (KT5, KT6, KT3)
- Region
- Greater London
- Prices
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- Appointments
- Weekdays, Saturdays and Sundays
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
Electronic leak detection around Tolworth
In outer London, interwar semis with hipped, tiled roofs sit alongside older slate-roofed terraces. If your home in Tolworth 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. About 2.5 miles south-east lies Fitznells Manor, a reminder of how long the area around Tolworth 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.
If you look after a building such as Our Lady Immaculate Catholic Primary School, a large flat roof with plenty of outlets and rooflights has many places where a membrane can fail. If you let a flat or house near Tolworth station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Tolworth is about 2 miles north-west of Ewell, in Greater London. We carry out electronic leak detection for homes and businesses in Tolworth. Tolworth is one of the towns and villages in Greater London we cover. London is in our area too.
All of KT5, KT6 and KT3 is within our area for electronic leak detection, from the main roads to the quietest streets. Whether your property is on Pyne Road, Ewell Road and Derby Road or anywhere close by, we can help. Neighbouring places we cover for electronic leak detection include Berrylands (1 mile north), Old Malden (1 mile south-east), Surbiton (1 mile north-west), Worcester Park (1 mile south-east) and Chessington (2 miles south-west). Further out, we also cover London (11 miles north-east), City of Westminster (11 miles north-east), Marylebone (11 miles north-east), Kensington (9 miles north-east), St Pancras (12 miles north-east) and Shoreditch (13 miles north-east).
Near you in Tolworth
Locally, jobs take us to homes and businesses close to Richard Challoner School, Hogsmill LNR and Shrewsbury House School and the streets around them. Tolworth’s nearest station is Tolworth station, about 0.5 miles south. Other landmarks nearby include Cockney Museum (2.1 miles south-east) and Bentall Centre (2.2 miles north-west). For a walk, there is Southwood Open Space and The Lake.
What electronic leak detection doesn’t cover
Our survey isn’t a RICS Level 2 or Level 3 survey, a structural engineer’s report or an asbestos survey. Other limits to bear in mind:
- Roofs whose membrane or build-up is not suitable
- Carrying out the repair work
- Water entering through details rather than the membrane
Not sure which survey suits your roof? You can phone 07833 053749 or drop us an email and we will tell you before you book. What our survey covers.
Roof types and parts we check
- Roof terraces and balconies
- Liquid-applied waterproofing
- Flat roof membranes
- Green roofs
- Commercial flat roofs
- Single-ply roofs
Your questions about electronic leak detection in Tolworth
Will parking be an issue for a roof survey in Tolworth?
Parking in Tolworth, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when booking.
How do I find out if my home in Tolworth is listed?
For listing, use Historic England’s list; for conservation areas, ask the council. It matters most if you’re planning to re-roof in a different material.
Does this replace a RICS home survey?
No. We check the roof, not the whole building, and it isn’t a RICS Level 2 or Level 3 survey. Many buyers have both.
Will I get photos?
Yes. The report includes photographs of what we found, so you can see each point for yourself.
Is my roof suitable for ELD?
That depends on the roof’s membrane and layers. Share any details you have and we’ll confirm suitability.
Do I have to be there for the survey?
Not necessarily. If we only need the outside, we can agree that beforehand, but the loft and any rooms with damp need someone to let us in.
What does the report include?
It sets out what we found, why it matters and what we recommend, with photos throughout. It also says if any part of the roof couldn’t be seen safely.
Signs you need electronic leak detection in Tolworth
New membranes can have defects from installation. ELD on a new roof can show holes before they cause leaks.
Common reasons to book include:
- New membranes needing a check before handover
- Leaks through a covered membrane
- Leaks through a flat roof with no obvious cause
- Stains far from any visible defect
For a London address like Tolworth, it helps to know about controlled parking before the day.
Before booking any roof surveyor
- Are they insured for the work?
- How long the report takes to arrive
- Whether any drone flown is registered with the CAA
- Which parts of the roof they’ll actually see
What we do, step by step
Every visit follows the same pattern: we hear what you’ve seen, inspect the roof from every safe viewpoint, photograph what we find and record our findings for the written report. Most visits take longer on a large roof than a small one, and the build-up of the roof makes a difference too. In a London conversion, the way into the roof space is frequently from a communal landing or the top flat. If that applies to your building, it’s useful to agree access with the neighbours or the managing agent first. Otherwise, the visit in Tolworth runs like any other.
- We start by finding out what the roof is made of and where it leaks.
- The roof is assessed to see if electronic testing will work on it.
- We pick the low-voltage or high-voltage method that suits the roof.
- Testing runs across the roof to locate breaches in the membrane.
- The breaches are recorded with photos in a report for your roofer.
Before the survey
- For flats, check roof access has been agreed
- Let us know about parking near the property
- Move anything stored under the loft hatch
Arrange a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, phone 07833 053749 or email us.
Advice
Why act early in Tolworth
Some breaches are too small to see. Electronic testing can find breaches you cannot see by eye, on suitable membranes. London’s older roofs often have bitumen felt underlay or none at all, so a slipped slate can soon mean water inside. Left unchecked, water soaks into timber and plaster and the damage spreads.
Bigger, taller and commercial roofs take more time to survey, so they’re priced to match. You will know the figure before booking.
Why book us in Tolworth
- Drone and thermal imaging surveys available
- 5,000+ roofs surveyed
- CAA-registered drone operator (Flyer ID and Operator ID)
- Covered by professional indemnity and public liability insurance
Take a look at what a roof survey costs or two real surveys.
Towns and villages near Tolworth
More services for Tolworth
Should I look at the roof myself first?
Your own check is a good start, but it isn’t a survey. From ground level, valleys, flashings and the backs of chimneys are often out of sight.
The one thing to avoid is getting up close. Slates, tiles, flat roofs and rooflights can give way, and falls from height are serious. That part is for a survey.