Greater London · London and the South East
Electronic leak detection in Knightsbridge, Greater London
Electronic leak detection to pinpoint holes in flat roof membranes in Knightsbridge, with drones and thermal imaging where they help. Call or email for a price.
- Water coming in under a flat roof
- Holes around roof penetrations
- Damp inside with no sign on the roof
Different roofs, different checks
Bituminous membranes
Bitumen roofs can frequently be tested electronically though the layers below matter.
Liquid-applied waterproofing
What lies under a liquid coating decides if ELD will work.
Electronic leak detection in Knightsbridge: what you get
Not every flat roof suits electronic testing. Certain membranes conduct electricity, and some build-ups lack the layer the test needs below the membrane. If your roof is not suitable, we will tell you at the start. Any details you have about the membrane and build-up help us decide, such as drawings or specifications. It avoids arranging a test that cannot give results. We survey flat roof membranes, single-ply roofs and roof terraces and balconies, and the problems we’re asked to look at most are leaks under green or ballasted roofs and holes around roof penetrations.
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 Knightsbridge, the flat roof is often a shared part of the building.
Nothing in the report is left vague: if work is needed, the report says so clearly, along with how urgent it is.
- Location
- Knightsbridge (SW1X, SW3, W1K)
- Region
- Greater London
- Cost
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Appointments
- Weekdays, Saturdays and Sundays
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
Places near Knightsbridge
What else we do in Knightsbridge
The survey, step by step
On the day, we start by asking what you’ve noticed and what you want to find out. We then inspect everything that can safely be seen, using the ground, windows, the loft and a drone where applicable. The survey usually takes more time on a big roof than a small one, with the construction of the roof playing a part too. Surveys in Knightsbridge can be booked for any day of the week. 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 frequently 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.
- We pick the low-voltage or high-voltage method that suits the roof.
- We test the membrane and find where current is passing through it.
- We send a report with photos of each breach so your roofer can repair it.
Preparing for the visit
- Clear the way to the loft hatch
- Have any questions written down, so nothing gets missed
- Make sure we can get to the back of the property
How to book
Every survey is priced before it is booked, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. To book, call 07833 053749 or use the contact form.
Advice
Useful tips for Knightsbridge property owners
Small things make a difference, both for the survey and for the roof itself. Some pointers:
- Don’t let outlets block
- Do not leave water getting in
- Tell us about the membrane and build-up if you know it
- Note where leaks show inside and when
Where the evidence points to walls, copings or rooflights, we’ll note it, with a suggestion of what to check next.
Ask trades working on the roof to protect the membrane when fitting equipment. Check the roof after they’ve finished.
Honest limits
Our findings are based on what we can see safely on the day, so there are some things a survey can’t cover:
- Parts of the roof covered by fixed equipment
- The extent of water in the insulation
- Leaks from plumbing or windows
If you are not sure which survey you need, call 07833 053749 or email us and we’ll give you a straight answer before you book. The full list of what we check.
Roofs we survey in Knightsbridge
- Liquid-applied waterproofing
- Commercial flat roofs
- Roof terraces and balconies
- Flat roof membranes
- Single-ply roofs
- Green roofs
What electronic leak detection looks like in Knightsbridge
Inner London’s Victorian and Edwardian terraces often have Welsh slate roofs. Behind many of their parapets sit butterfly roofs and valley gutters that can’t be seen from the pavement. Lead flashings, party-wall upstands and shared chimney stacks are typical of these houses, if yours is one of them. Mixed in with those pitched roofs are lots of flat ones, over rear extensions, dormers, garages and shops. The wider area around Knightsbridge has a long history of building, with Apsley House about 0.5 miles east. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and any change of roofing material on a listed home needs checking with the council first.
Landlords with a home close to London Victoria station may find that flat roofs over rear additions and dormers in rented property are worth checking between tenancies. If you run a business near Harrods, a flat roof over a business is out of sight and out of mind until it leaks.
Knightsbridge is about 1 mile north of Brompton, in Greater London. Bookings from Knightsbridge are handled just like any other: get in touch, agree the price and pick a day. Our area takes in places right across Greater London, large and small.
Every address in SW1X, SW3 and W1K is covered for electronic leak detection, from the main roads to the quietest streets. Streets in the area include Hans Road, Park Lane and Cadogan Lane, all of which we cover. Main roads around Knightsbridge include the A315 and A4202. We also cover Tyburn (1 mile north), Mayfair (1 mile north-east), Hyde Park Estate (1 mile north), Connaught Village (1 mile north) and City of Westminster (1 mile north-east). Within a short drive, we also cover London (3 miles east), St Pancras (3 miles north-east), Shoreditch (4 miles north-east), Walthamstow (8 miles north-east), Hoxton (4 miles north-east) and Whitechapel (4 miles east).
Around Knightsbridge
Locally, jobs take us to homes and businesses close to Saint Thomas More Language College, St Joseph's Catholic Primary School and Paxtons Head pub. You’ll also find Natural History Museum Library and Archives (0.7 miles south-west) and Royal Parks of London (0.5 miles north). Knightsbridge’s nearest station is London Victoria station, roughly 0.9 miles south-east of the centre. Nearby you’ll also find London Lock Hospital (0.6 miles east) and Westminster Synagogue Czech Memorial Scrolls Museum (within half a mile west). For a walk, there is Campden Hill and Greville Place nature reserve.
Checking the roof from the ground
Look up at the roof after a storm, from ground level: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Do not go up yourself.
What you cannot do safely is get up close. Roofs are fragile and slippery, and a fall can be serious. That part is for a survey, using safe viewpoints and a drone where it applies.
Knightsbridge: your questions answered
Is parking a problem for a survey in Knightsbridge?
It can be, so it is useful to let us know about permits, visitor bays or off-street space when booking. The visit is then planned around what’s available.
How do I find out if my home in Knightsbridge is listed?
Your council is the best source, with Historic England’s list for listed buildings. Both listing and conservation areas can limit changes of roofing material.
What is electronic leak detection?
A sound membrane blocks the test current, but a hole lets it through. That is how we locate breaches you cannot see.
Is Knightsbridge in your area?
Yes. Knightsbridge is part of the area we cover, and the service is the same as everywhere else we work.
What’s in the survey report?
You get our findings in writing, part by part, with photos, finishing with recommendations. The most urgent items are made clear.
What’s the price of ELD?
We quote for each roof individually. Let us know about the roof and where it leaks. Just ring 07833 053749 or use the contact form for a quote.
Can you survey in bad weather?
It depends on the weather and the survey. Strong wind or heavy rain can make access unsafe and ground a drone, and we’d agree another day.
Do you need electronic leak detection in Knightsbridge?
If a flat roof keeps leaking after patching, the hole may be elsewhere. Electronic testing helps pinpoint it.
Signs worth acting on include:
- New membranes needing a check before handover
- Breaches hidden under paving or planting
- Patched roofs that still leak
- Punctures from foot traffic or tools
Anyone responsible for a site like Hellenic College of London will know that schools and public buildings frequently have big flat roofs, and their outlets and upstands need regular checks.
Questions to ask before booking
- Whether the loft space is looked at, where there is one
- What follow-up you get after the report
- Is VAT included in the price?
- What they will not be able to tell you