Greater London · London and the South East
Electronic Leak Detection in Marylebone
We carry out electronic leak detection in Marylebone and the rest of Greater London. Surveys run seven days a week.
- Leaks through a flat roof with no obvious cause
- Waterproofing to test before it is covered
- Holes around roof penetrations
Electronic leak detection in Marylebone
Water can travel under a flat roof membrane before it shows inside. So the stain inside rarely sits under the hole. Electronic leak detection tests the membrane itself, to find where it has been breached. We test and report and leave the repair to your roofer. On suitable roofs, it replaces guesswork with a located breach. We then send you the results in a written report. We’re frequently asked to look into a flat roof leak that can’t be traced and patched roofs that still leak, on commercial flat roofs, roof terraces and balconies and green roofs.
London has a lot of flat roofs: rear additions, dormers, roof terraces and the roofs of blocks and offices. They’re covered in felt, asphalt, EPDM rubber, GRP fibreglass or single-ply membranes, each with its own weak points. Which one is on a roof in Marylebone shapes how it’s checked. Older flat roofs are frequently felt or asphalt, newer ones rubber or GRP.
After the visit, you get a report with photos, emailed to you. It explains the condition of the flat roof membrane, the defects we found and what we recommend.
- Location
- Marylebone (W1U, W1T, W1K)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Your report
- A written report with photos, by email
- Appointments
- Monday to Sunday, daytime
- Insured
- PI and public liability insurance
- Phone
- 07833 053749
- Updated
- 27 October 2026
Useful tips for Marylebone property owners
A little preparation and a few simple habits help. Some pointers:
- Check new waterproofing before handover
- Let us know about the membrane and build-up if you know it
- Ask contractors to protect the membrane
- Keep outlets clear of debris
Once repairs are made, the roof can be tested again if you want to check them, where the roof still suits the method.
Ask trades working on the roof to protect the membrane when they work up there. Check the roof after they’ve finished.
Why act early in Marylebone
ELD before paving, ballast or planting goes on is simpler. Once layers are added, finding a breach is harder. In Marylebone, as in much of London, water from a roof defect can reach a neighbour’s home as easily as yours: 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. We quote electronic leak detection for each roof, as the method and time depend on the roof. We confirm the price for the job before booking.
Why us?
- A written report with photographs
- An independent view of the roof
- 5,000+ surveys completed
- CAA-registered drone operator (Flyer ID and Operator ID)
See what a roof survey costs and what we found on two real jobs.
What this survey cannot tell you
It’s a careful look at the flat roof membrane, not the whole story. Its limits include:
- Leaks from plumbing or windows
- Parts of the roof covered by fixed equipment
- Fixing the holes we find
If you are not sure which survey you need, phone 07833 053749 or use the contact form and we’ll give you a straight answer before booking. The full list of what we check.
Roof types and parts we check
- Liquid-applied waterproofing
- Flat roof membranes
- Single-ply roofs
- Green roofs
- Roof terraces and balconies
- Commercial flat roofs
Common roof problems in Marylebone
Roofs covered with paving, ballast or planting hide the membrane. Electronic methods can help on some of these roofs, depending on the build-up.
It’s worth booking a survey if you’ve seen:
- A flat roof leak that cannot be traced
- Leaking laps in the waterproofing
- Breaches around outlets and penetrations
- New roofs to check before paving or planting
For an older house near a landmark like Russian chapel on Welbeck Street, later flat-roofed additions are common on older houses, and their edges and upstands frequently show the first signs of wear.
What to check before booking
- Their drone registration, if they fly one
- Whether the inside of the roof is included
- What the report includes, and whether it has photos
- Their track record with similar roofs
Electronic leak detection in Marylebone: local notes
Historic houses like Handel Hendrix House, about 0.3 miles south, show how far back building in the area around Marylebone goes. On older houses around here, roofs frequently 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. Marylebone has a number of hotels within about a mile and a half. If you look after one, a leak through a flat roof can put a room out of use.
Hotels and guest houses near Marylebone can’t easily close rooms for a leak, so it’s worth knowing the roof’s condition. For businesses in and around places such as Kingly Court, a flat roof over a business is out of sight and out of mind until it leaks.
Marylebone is about 3 miles north-west of London, in Greater London. We survey roofs in Marylebone and the surrounding area across London and South East England. Marylebone is one of the places in Greater London we cover for electronic leak detection.
Every address in W1U, W1T and W1K is within our area for electronic leak detection, from the main roads to the quietest streets. Whether your property is on Park Lane, Duck Lane and Bruton Lane or anywhere close by, we can survey it. Main roads around Marylebone include the A400 and A401, so getting to you is simple. Neighbouring places we cover for electronic leak detection include City of Westminster (1 mile south-west), Mayfair (1 mile south), Fitzrovia (1 mile north-east), Burlington Estate (1 mile south-east) and Soho (1 mile south-east). Within a short drive, we also cover London (3 miles south-east), Kensington (3 miles south-west), Shoreditch (3 miles east), Walthamstow (7 miles north-east), Hoxton (3 miles north-east) and Whitechapel (3 miles east). Marylebone is one of the larger places we cover in Greater London.
Around Marylebone
In Marylebone, that means homes and buildings near St Anne's Churchyard, The St Marylebone CofE School and Royal Society of Medicine Library and the streets around them. Also close by are The St Marylebone CofE School (less than half a mile north-west) and The Phoenix pub (under half a mile south-east). Marylebone has its own railway station: Bond Street station. Other landmarks nearby include Montfichet's Tower (2 miles east) and Twist Museum (under half a mile south-east). Not far away are Adelaide Nature Reserve and St. James's Park Lake.
Towns and villages near Marylebone
What else we do in Marylebone
FAQs for Marylebone
Will parking be an issue for a roof survey in Marylebone?
Usually it is manageable with a little notice. Let us know what parking is available nearby, and the visit is planned around it.
Can you look at the flat roof of a hotel or office near Marylebone?
Yes, we cover commercial roofs as well as homes. Roof access is agreed with the building manager or owner beforehand.
How long does electronic leak detection take?
It depends on the size of the roof and its build-up. We will give you an idea when we quote.
Do you look in the loft space?
Yes, where the survey calls for it and there is safe access. Inside, we look for damp, staining, gaps and sagging.
Does ELD include fixing the breach?
No. ELD is testing only. The report shows where each breach is so your roofer can fix them.
How do you choose the testing method?
The roof decides the method. We will explain why when we quote.
What if it rains on the day?
It can, depending on the survey. Drone flights need calm, dry weather, and thermal imaging works best with a dry roof, little wind and a sunny day beforehand. We’ll rearrange with you if the weather isn’t right.
Should I look at the roof myself first?
Keep a simple record: when leaks happen, ground-level photos and any past roof work. Share it with us as you book, as it helps us focus the survey.
After heavy rain, check ceilings and the tops of walls for new stains. Photograph them and note the date.
What happens on the day
Every roof is different; as a rough guide, the survey takes as long as needed for the roof’s area and construction, and we’ll give you a guide when quoting. You are welcome to ask questions while we’re there. In Marylebone, visits are available on weekdays and at weekends. London parking is often by permit or pay-and-display, so it’s useful to know what’s near you, and to clear a path to the loft hatch. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- The test method is chosen to suit the roof.
- We test the roof and locate any breaches.
- A report with photographs shows where each breach is.
How to prepare
- Find any records of previous roof work
- Have keys ready for side gates, garages or roof access doors
- Show us where any leaks or stains appear
How to book
We confirm the exact price before you book, so you know where you stand. We quote electronic leak detection for each roof, as the method and time depend on the roof. For a price for your roof, call 07833 053749 or drop us an email.