Greater London · London and the South East
Electronic Leak Detection in Isleworth
Electronic leak detection across Isleworth, with over 20 years’ experience behind it. Every survey ends with a written report and photographs.
- Failed seams and laps
- Waterproofing to test before it’s covered
- Damage from equipment installers
Checking the roof from ground level
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it, which helps when we check the roof.
You can learn a lot from ground level. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Never climb onto the roof to look.
About our electronic leak detection in Isleworth
There are different ELD methods. Low-voltage testing is normally done with the surface wet and high-voltage methods need the membrane dry and exposed. Which one suits depends on the membrane and the layers of the roof and we explain which we will use. We’ll say if your roof does not suit either method before any testing starts. We survey single-ply roofs, flat roof membranes and roof terraces and balconies, and the problems we’re asked to look at most are leaks through a covered membrane and failed seams and laps.
On a London roof terrace or a flat roof over a back addition, water frequently runs under the covering before it shows. Upstands against parapets, outlets and the edge where flat meets pitched are common entry points. In a block or conversion in Isleworth, the flat roof is frequently a shared part of the building.
The report is yours to share with whoever needs it: a seller or estate agent, an insurer, a roofer, a builder or a managing agent, whichever applies.
- Where
- Isleworth (TW7, TW1, TW3)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- When we survey
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
Leave it or get it looked at?
Repeated call-outs for the same leak add up. A report showing the breach points gives your roofer a clear target. London’s older roofs often have bitumen felt underlay or none at all, so once the slates or flashings let water past, little stops it reaching ceilings. Left unchecked, water soaks into timber and plaster and the damage spreads.
All our prices include VAT. We quote electronic leak detection for each roof, as the method and time depend on the roof. You will know the price for the job before you book.
Why choose Independent Roof Survey in Isleworth
- Every finding written up with photos
- Drone flown under a CAA Flyer ID and Operator ID
- 5,000+ roofs surveyed
- Surveys on any day of the week
Read what a roof survey costs or what we found on two real jobs.
Flat and commercial roofs around Isleworth
Outer London has plenty of Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in clay or concrete tiles. On a semi of that age, the small roofs over the bays, the hip tiles and any later dormer each need their own look. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere. The wider area around Isleworth has a long history of building, with Syon House about 0.9 miles north-east. 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 let a flat or house near Isleworth station, the flat roof over a let home is worth a look before it becomes a tenant complaint. For site and facilities teams at buildings such as St Mary's Catholic Primary School, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly. If you look after a shop, office or commercial unit, for example near Treaty Centre, a flat roof over a business is out of sight and out of mind until it leaks.
Isleworth is about 2 miles north of Twickenham, in Greater London. Anywhere in Isleworth, we can carry out electronic leak detection at your property, on a weekday, Saturday or Sunday. Isleworth is one of the places in Greater London we cover for electronic leak detection. For surveys nearby, see our London page.
We survey roofs across TW7, TW1 and TW3 for electronic leak detection. We offer electronic leak detection to properties on Upper Square, London Road and Shire Horse Way and the roads around them. We also cover the places around Isleworth: Woodlands (1 mile west), St Margarets (1 mile south-east), Ivybridge (1 mile south-west), Spring Grove (1 mile north-west) and Hounslow (1 mile west). We also work in nearby towns like London (10 miles east), City of Westminster (8 miles east), Marylebone (9 miles north-east), Kensington (6 miles east), St Pancras (10 miles north-east) and Shoreditch (12 miles east).
Near you in Isleworth
Locally, jobs take us to homes and businesses close to The George Inn, Kneller Hall Junior School and Gumley House RC Convent School and the streets around them. Isleworth has its own railway station: Isleworth station. Nearby you’ll also find West Middlesex University Hospital (within half a mile north-east) and Museum of Army Music (1.4 miles south-west). The countryside around Isleworth includes Richmond Hill and Kew Gardens Lake.
What happens on the day
Photographs are taken throughout the visit, so you can see in the report what we found and where. Close-ups come from the safest viewpoint available. Most surveys take a length of time set by the roof’s area and construction, which we set out in the quote. In Isleworth, visits are available on weekdays and at weekends. It helps if you can point us to a visitor permit or a nearby bay, and to clear a path to the loft hatch. Upstairs rooms at the back are useful too, as they often give the best view of a rear addition.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We confirm whether the roof is suitable for electronic testing.
- The method depends on the membrane and what sits above and below it.
- Testing runs across the roof to locate breaches in the membrane.
- The breaches are recorded with photographs in a report for your roofer.
Getting ready for the survey
- Have any paperwork from past roof work to hand
- For flats, make sure roof access has been agreed
- Make a note of anything you’d like us to look at
Book a survey
A quick phone call is typically the easiest start: phone 07833 053749 or email us, and we’ll ask about the building and what you need. You will have a price before anything is arranged.
Advice
Isleworth: your questions answered
Will parking be an issue for a roof survey in Isleworth?
Normally it’s manageable with a little notice. Let us know the parking rules on your street and we will work around them.
Is my home in Isleworth 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.
Will you walk on the roof?
Only where it is safe to do so. We inspect everything that’s safely in view: from ground level, from windows and vantage points, from the loft space, from the roof itself where safe and by drone where it applies. Anything we can’t see is noted in the report.
What does electronic leak detection do?
It uses an electrical current to find breaches in a flat roof membrane. A breach lets the current through so we can pinpoint it.
Is this an asbestos survey?
No. Asbestos surveys and testing are not part of what we do. We flag materials that could contain asbestos, like cement sheets or soffits on pre-2000 buildings and suggest a specialist asbestos surveyor checks them before any work.
How soon will I get the report?
Basic reports arrive within 48 hours, Standard reports in 24–48 hours and Premium reports on the same day. Each one is emailed, ready to forward.
How long have you been surveying roofs?
Over 5,000 surveys so far, across 20+ years of surveying roofs, with 98% customer satisfaction.
Landlord and commercial surveys in Isleworth
Where a roof is shared: we need access agreed with whoever owns or manages the building. Mention it when you get in touch and we will plan the survey around it.
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on, photographs included.
Places near Isleworth
Also in Isleworth
Prices for electronic leak detection in Isleworth
What a survey costs depends on the time and equipment it needs. That comes down to:
- Extra roofs, like extensions, dormers or garages
- Building height and the viewpoints available
- Whether thermal imaging or a drone is needed
- House, block, shop or office
Bigger, taller and commercial roofs take more time to survey, so they’re priced to match. The price is confirmed before you book.
Booking your survey
To price your survey accurately, we will ask about:
- Any marks or damp showing indoors
- The type of building and roof, such as pitched or flat
- Pictures of the roof from a safe spot, if you have them
- What made you get in touch
Photos help, if you have them. Take them safely from ground level or a window; never climb up to get a better view. To get started, phone 07833 053749 or use the contact form.
Practical tips
These tips come from what we see on roofs every week, before and after a survey:
- Act on new leaks promptly
- Ask contractors to protect the membrane
- Share any drawings of the roof
- Test new membranes before covering them
If we think the leak isn’t coming through the membrane, the report says so, so other causes can be checked.
Keep outlets and gutters on flat roofs clear. Water that sits on the roof finds breaches faster.