Greater London · London and the South East
Electronic Leak Detection in Gunnersbury
Independent electronic leak detection in Gunnersbury. More than 5,000 surveys completed across London and South East England.
- Damage from equipment installers
- Repairs that haven’t stopped the leak
- Failed seams and laps
What happens on the day
Every visit follows the same pattern: we hear what you’ve seen, inspect the roof from every safe vantage point, take photographs as we go and record our findings for the written report. Most visits take a length of time set by the membrane area and the build-up, which we set out in the quote. From the street, a London terrace normally shows only its front slope or parapet, so in Gunnersbury we work round the house, using the street, the windows, the loft and any safe vantage point behind it. If other people live in the building, tell us who can let us into the shared parts.
- We agree the area to be tested.
- The surface is prepared for the chosen method.
- We work across the roof with the test equipment.
- We mark the breach locations in our records.
- The report is sent for your roofer to act on.
Before we arrive
- If you are buying, let the agent know when we are coming
- Keep pets inside or away from the areas we’re looking at
- Point out any leaks or damp patches
How to book
Our phone lines are open seven days a week, including Saturdays and Sundays. For a price or to book, ring 07833 053749 or email us.
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Electronic leak detection in Gunnersbury
Our ELD testing covers flat roofs in Gunnersbury and the rest of London and South East England. Testing typically takes as long as needed for the size of the roof and how it’s built, and we’ll give you a guide when quoting. Electronic leak detection is quoted for your roof, because the method depends on the roof. You get a written report with photos. We’re often asked to look into waterproofing to test before it’s covered and patched roofs that still leak, across liquid-applied waterproofing, green roofs and flat roof membranes.
On a London roof terrace or a flat roof over a back addition, water often runs under the covering before it shows. Outlets, upstands against parapet walls and joins with the main roof are frequent culprits. In a converted house in Gunnersbury, the roof above may belong to the building rather than one flat.
Most points in the report come with a picture, so you can see each defect rather than just read about it. Anything out of sight on the day is listed as such.
- Where
- Gunnersbury (W4, W3, TW8)
- Wider area
- Greater London
- Price
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
Leave it or get it looked at?
Repairs in the wrong place leave the leak in place. Testing shows where the membrane is actually breached. Many older London roofs have only old felt under the slates, or no underlay at all, so a slipped slate can soon mean water inside. Left alone, that means wet timbers and plaster, which is a far bigger job than the roof fault itself.
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 price for your survey before booking.
Why book with us
- Customer satisfaction of 98%
- Visits on any day of the week
- We hold a CAA Flyer ID and Operator ID
- An independent view of the roof
Take a look at how roof surveys are priced or our case studies.
What a survey costs
We confirm the price for the job before booking. This is what makes a difference:
- The height of the building and how the roof can be seen safely
- How many separate roofs there are, such as extensions, dormers and garages
- House, block, shop or office
- Any need for thermal images or a drone flight
To find out what your survey will cost, phone 07833 053749 or email us with the address and a few details. We will confirm the figure before booking.
Getting in touch
A few details help us point you to the right survey and price. When you get in touch, it is useful to mention:
- Why you want a survey: buying, a leak, a storm or new work
- Any photos you have, taken from the ground or a window
- Your postcode, so we can check access and travel
- Dates you’re working to, such as exchange
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, ring 07833 053749 or email us with the address and the days you’d prefer.
When you need someone else
We only report whatever is safely visible on the day, so some things are outside what a survey can do:
- Carrying out the repair work
- Some conductive membranes
- Areas we can’t reach or that cannot be tested
If in doubt, call 07833 053749 or use the contact form and we’ll point you to the right survey before booking. What our survey covers.
Roofs we survey in Gunnersbury
- Single-ply roofs
- Commercial flat roofs
- Green roofs
- Flat roof membranes
- Liquid-applied waterproofing
- Roof terraces and balconies
How the survey changes by roof type
Inverted and paved roofs
Inverted roofs have the insulation on top of the waterproofing, which affects testing.
Liquid-applied waterproofing
Testing a liquid-applied roof depends on what’s beneath the coating.
Common questions in Gunnersbury
Can parking be tricky for a visit in Gunnersbury?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available as you book.
Do you look at commercial flat roofs near Gunnersbury, like hotels?
Yes, we cover commercial roofs as well as homes. Roof access is agreed with the building manager or owner beforehand.
Can you inspect my roof with a drone?
Yes, where it’s applicable. Flights depend on the weather on the day and airspace rules. We hold a CAA Flyer ID and Operator ID.
How long have you been surveying roofs?
We have been surveying roofs for over 20 years and have completed over 5,000 surveys.
Which days do you carry out surveys?
We survey seven days a week: Monday to Friday, Saturdays and Sundays. Just tell us the days that suit you.
Will you photograph what you find?
Yes. Photos are taken throughout the survey, and they go into the written report.
How long will testing take?
It depends on the size of the roof and its build-up. We will give you an idea when we quote.
Flat and commercial roofs around Gunnersbury
About 0.7 miles north-west lies Gunnersbury Park, a reminder of how long the area around Gunnersbury has been built on. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs. Within a mile and a half or so of Gunnersbury there are several hotels, and hotels, like offices and blocks of flats, frequently have flat roofs. For hotels and other commercial buildings, finding the cause of a flat roof leak quickly keeps rooms in use.
For hotels and guest houses around Gunnersbury, a roof problem found early is far less disruptive than one found by a guest, so it is worth knowing the roof’s condition. If you live in an older home near St Michael's Church, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof.
Gunnersbury is about 1 mile south of Acton, in Greater London. Whether the building in Gunnersbury is a house, a flat or a commercial unit, we can survey the roof on a weekday or at the weekend. Gunnersbury is one of the towns and villages in Greater London where we work for electronic leak detection. Our London page covers surveys nearby.
Every address in W4, W3 and TW8 is within our area for electronic leak detection, from the main roads to the quietest streets. If you need electronic leak detection at a property on Kew Road, Kent Road and Power Road or a nearby road, we can survey it. Gunnersbury sits on or near the A3000, which makes travel easy. Close by, we survey roofs in Strand-on-the-Green (1 mile south), Kew (1 mile south), Grove Park (1 mile south-east), Chiswick (1 mile east) and Turnham Green (1 mile south-east). Larger places within reach include London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles east), Kensington (3 miles east), St Pancras (7 miles east) and Shoreditch (9 miles east).
What’s near Gunnersbury
We work in homes and buildings around Clayton Hotel Chiswick, Kew College Prep and Ark Acton Academy, among other places. Also close by are Turnham Green (0.5 miles east) and Library for Iranian Studies (1 mile north). There’s a railway station in Gunnersbury itself: Gunnersbury station. A little further out are Barnes Hospital (2 miles south-east) and Livat Hammersmith (2.1 miles east). Not far away are Kew Gardens Lake and Castlebar Hill.
Towns and villages near Gunnersbury
What else we do in Gunnersbury
When to book a survey in Gunnersbury
Joints and laps in a membrane can fail over time. A gap that’s hard to see can let water in long before anyone notices.
A survey can pick up problems such as:
- Punctures from foot traffic or tools
- Leaks under green or ballasted roofs
- Patched roofs that still leak
- Leaking laps in the waterproofing
Shop and office owners around Livat Hammersmith may find that a flat roof over a business is out of sight and out of mind until it leaks.
Questions to ask before you book
- Whether you get a written report with photos
- Whether any drone flown is registered with the CAA
- Whether they hold professional indemnity and public liability insurance
- What follow-up you get after the report