Greater London · London and the South East
Electronic leak detection in St Margarets, Greater London
Electronic leak detection to pinpoint holes in flat roof membranes around St Margarets, with findings in writing and pictures to back them up. Weekday and weekend visits available.
- Damage from equipment installers
- New membranes needing a check before handover
- Repairs that haven’t stopped the leak
What we’re asked to look at in St Margarets
Repeated leaks after repairs suggest the real breach hasn’t been found. ELD can locate the breach more precisely.
Problems we come across frequently include:
- Leaks through a flat roof with no obvious cause
- Stains far from any visible defect
- Waterproofing to test before it is covered
- Leaks through a covered membrane
Richmond House, about 1 mile south, is one of the historic houses in the wider area around St Margarets. If your home is older, its flat-roofed extension or dormer may be on its second or third covering.
Before booking any roof surveyor
- What follow-up you get after the report
- Is VAT included in the price?
- What exactly goes into their report
- Their drone registration, if they fly one
Electronic leak detection in St Margarets: what you get
You get a report showing the location of each breach with photos. It tells your roofer exactly where to repair instead of hunting for the leak. Repair costs are not part of the report, so your roofer prices the work. Testing again after repairs can confirm the breaches have been dealt with if the build-up allows. Results come in a written report with photos. Common reasons to book are leaks under green or ballasted roofs and breaches around outlets and penetrations, across commercial flat roofs, single-ply roofs and liquid-applied waterproofing.
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 converted house in St Margarets, the roof above may belong to the building rather than one flat.
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.
- Where
- St Margarets (TW1, TW7, TW9)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- Survey days
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Also near St Margarets
Other services in St Margarets
What electronic leak detection looks like in St Margarets
There are several hotels within about a mile and a half of St Margarets, and hotels, like offices and blocks of flats, often have flat roofs. For hotels and other commercial buildings, finding the cause of a flat roof leak quickly keeps rooms in use. Alongside Victorian and Edwardian terraces, outer London has a great many interwar semis, often with hipped roofs of 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. Next to the main roofs there is typically a flat roof somewhere, whether on an extension, a garage or a commercial unit.
For hotels and guest houses around St Margarets, a roof problem found early is far less disruptive than one found by a guest. If you let a flat or house near St Margarets (London) station, flat roofs over rear additions and dormers in rented property are worth checking between tenancies.
St Margarets is about 1 mile north-east of Twickenham, in Greater London. Houses, flats, blocks and commercial buildings in St Margarets can all book electronic leak detection. Across Greater London, we cover St Margarets. Our London page covers surveys nearby.
Surveys in TW1, TW7 and TW9 are booked the same way as anywhere else. Whether your property is on Eve Road, Park Road and Crown Road or a nearby road, we can help. You will find St Margarets on the A316 and A3004, which makes it straightforward to reach. If you are just outside St Margarets, we cover Isleworth (1 mile north-west), Richmond (1 mile east), Ivybridge (1 mile west), Eel Pie Island (1 mile south) and Twickenham (1 mile south-west). We also work in nearby towns like London (10 miles east), City of Westminster (8 miles north-east), Marylebone (8 miles north-east), Kensington (6 miles north-east), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Local landmarks in St Margarets
We work in homes and buildings around Richmond Green, Orleans Park School and The Turks Head pub and the streets around them. St Margarets has its own railway station: St Margarets (London) station. Other landmarks nearby include South Middlesex Hospital (0.8 miles west) and Eel Pie Island Museum (0.8 miles south). Open spaces near St Margarets include Richmond Hill and Ham Lands.
What happens if roof problems are left?
Patching where you think the leak is often misses it. Testing shows where the membrane is actually breached. In a London terrace or conversion, a roof defect rarely stays your problem alone: a blocked parapet gutter or slipped slate can let water into the flat below or the house next door. Dealing with it early is far less disruptive.
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You will know the price for your survey before you book.
Why us?
- Weekday and weekend surveys
- A report with photos
- Thermal imaging and drones used where they help
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
Read what a roof survey costs and what we found on two real jobs.
The survey, step by step
Expect us to ask a few questions before we start, such as when any problem began and what work has been done before. Then the inspection itself takes as long as needed for the membrane area and the build-up, and we’ll give you a guide when quoting. In St Margarets, as in much of London, a good many 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.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We check that the membrane and build-up suit electronic leak detection.
- The method depends on the membrane and what sits above and below it.
- We test the membrane and find where current is passing through it.
- The breaches are recorded with photographs in a report for your roofer.
Preparing for the visit
- Check we can get to the back of the property
- Move anything stored under the loft hatch
- Gather any invoices or paperwork from past roof work
Arrange a survey
A quick phone call is normally the easiest start: ring 07833 053749 or email us. The price is agreed before a date is set.
Advice
Useful tips for St Margarets property owners
These tips come from what we see on roofs every week:
- Consider ELD before paving or planting goes on
- Use boards when working on the roof
- Clear flat roof outlets regularly
- Get leaks traced quickly
The report records each breach location with photos. Your roofer uses it to carry out repairs.
Limit foot traffic on flat roofs. Many breaches come from foot traffic.
St Margarets: your questions answered
Do you look at commercial flat roofs near St Margarets, such as hotels?
Yes. As well as homes, we check flat roofs on offices, hotels, blocks of flats and commercial units. Larger commercial roofs are quoted for the building, and roof access is agreed with you ahead of the visit.
Can parking be tricky for a visit in St Margarets?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
I live in a flat. Can you survey the roof?
Yes. Shared roofs just need a little more planning. Let us know about it when you book and we’ll plan the survey around it.
Will you fly a drone over my roof?
Yes, where it is applicable. We hold a CAA Flyer ID and Operator ID and fly a drone under 250g, and every flight depends on the airspace and the weather.
How long have you been surveying roofs?
More than 5,000 surveys over 20+ years.
What does electronic leak detection do?
ELD passes a small electrical current across the roof to locate holes in the membrane. A breach lets the current through, which shows us where the hole is.
Can you tell me if my roof has asbestos?
No. Asbestos surveys and testing are not part of what we do. If we see materials that could contain asbestos, such as cement roof sheets or soffits on buildings from before 2000, we flag them, and recommend a specialist asbestos surveyor checks them before they’re disturbed.
What you can safely check yourself
You can learn a lot from ground level. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Please don’t climb up for a closer look.
A DIY look is useful, but it isn’t a survey. You won’t see flashings, valleys or the backs of chimneys properly from ground level.
When you need someone else
To be straight with you, there are limits to any roof survey:
- Roofs whose membrane or build-up is not suitable
- Areas we can’t reach or that cannot be tested
- Water entering through details rather than the membrane
Not sure which survey suits your roof? You can call 07833 053749 or email us and we will tell you. What a survey covers and doesn’t.
Roof types and parts we check
- Flat roof membranes
- Single-ply roofs
- Roof terraces and balconies
- Green roofs
- Commercial flat roofs
- Liquid-applied waterproofing