Greater London · London and the South East
Electronic leak detection in Seven Dials, Greater London
Electronic leak detection across Seven Dials, with over 20 years’ experience behind it. Every survey ends with a written report and photos.
- Leaks through a covered membrane
- Holes around roof penetrations
- Leaking laps in the waterproofing
Your questions about electronic leak detection in Seven Dials
Do you cover commercial flat roofs around Seven Dials?
Yes, we cover commercial roofs as well as homes. Roof access is agreed with the building manager or owner beforehand.
Can parking be tricky for a visit in Seven Dials?
It can be, so it’s useful to let us know about permits, visitor bays or off-street space as you book. The visit is then planned around what’s available.
How many surveys have you done?
Over 5,000 surveys so far, over more than 20 years.
Do you look in the roof space?
If the survey needs it and the roof space can be reached safely, yes. A clear path to the hatch helps, and if the loft can’t be reached safely, the report says so.
What happens next?
We email you the written report with photographs and recommendations. You can use it to talk to a seller, an insurer, a roofer or a managing agent, whichever applies.
Does someone need to be in?
That depends on the survey. For inside areas and the loft space, someone has to give us access, while outside access can be discussed as you book.
Does the weather affect the survey?
Light rain does not typically stop a survey, and it can even help show where water is getting in. Heavy rain or strong wind can ground a drone and make the roof unsafe, so if conditions aren’t right we’ll arrange another day with you.
About our electronic leak detection in Seven Dials
You get a report showing the location of each breach, with photos. Your roofer can then repair those points instead of hunting for the leak. We do not estimate repair costs, 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. We are often asked to look into water coming in under a flat roof and stains far from any visible defect, across commercial flat roofs, liquid-applied waterproofing and green roofs.
Offices, shops and blocks of flats across London frequently have large flat roofs with plant, rooflights and walkways. Each pipe, upstand and fixing through the covering is a possible weak point. For a building in Seven Dials, access is agreed with whoever manages the roof ahead of the visit. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
The report is written in plain words, so you don’t need to be a roofer to follow it. Each point is backed by a photo where possible.
- Location
- Seven Dials (W1F, W1D, W1T)
- Wider area
- Greater London
- Cost
- Quoted for your roof
- Report
- A written report with photos, by email
- Appointments
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Why get it checked now?
Some flat roof leaks come from walls or details. Testing shows whether the membrane is breached, so other causes can be checked. Behind a London parapet, a blocked gutter can sit full of water without anyone seeing it. When the stain finally shows, the damage underneath is often older than it looks.
For a price for your roof in Seven Dials, call 07833 053749 or drop us an email and let us know about the roof. The price is agreed before a date is set.
Why us?
- Professional indemnity and public liability insurance
- Surveys on weekdays and at weekends
- A report with photos
- More than 5,000 surveys completed
See how roof surveys are priced and what we found on two real jobs.
Signs you need electronic leak detection in Seven Dials
When the membrane is buried, holes cannot be seen at all. ELD can work on some covered roofs though it depends on the layers.
Most people get in touch when they’ve noticed one of these:
- Damp inside with no sign on the roof
- Water coming in under a flat roof
- Damage from equipment installers
- Breaches hidden under paving or planting
For site and facilities teams at buildings such as St Josephs Catholic Primary School, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
Questions to ask before you book
- Are they insured for the work?
- How they plan to inspect the roof safely
- How long they’ve been surveying roofs
- What’s outside the scope of the survey
How the survey works
On the day, we begin with a quick chat about the roof and anything that’s worrying you. We then inspect everything that can be seen safely, from the ground, from windows, in the loft space and by drone where applicable. Most surveys take more time on a big roof than a small one, with the construction of the roof playing a part too. In Seven Dials, 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. A back bedroom window can be the best vantage point for a rear addition, so we may ask to use one.
- You let us know about the roof and where water is showing.
- We check whether the membrane and build-up suit ELD.
- We choose a low-voltage or high-voltage method to match the roof.
- We test the roof and locate any breaches.
- You get a report with photos of each breach.
Preparing for the visit
- Tell us where we can park nearby
- Leave side gates unlocked
- Tell us about any leaks, stains or damp patches you know of
Arrange a survey
Most bookings start with a short call: phone 07833 053749 or drop us an email and we’ll ask a few questions about the roof. You will have a price before anything is arranged.
Related advice
What we look for on each type of roof
Bituminous membranes
Bitumen roofs can often be tested electronically though the layers below matter.
Inverted and paved roofs
On inverted roofs, insulation sits above the membrane and that changes how testing works.
Flat roofs in Seven Dials
Inner London’s Victorian and Edwardian terraces often have Welsh slate roofs. From the street you may see only a parapet, with a butterfly roof and a valley gutter behind it draining to the back. 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 a good many flat ones, over rear extensions, dormers, garages and shops. The wider area around Seven Dials has a long history of building, with Benjamin Franklin House about 0.4 miles south. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof, and the council can say whether a home is in a conservation area.
If you look after a shop, office or commercial unit, for example near Kingly Court, the flat roofs over shops and commercial units are worth checking before a leak, not after. If you let a flat or house near Tottenham Court Road station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Seven Dials is about 1 mile east of City of Westminster, in Greater London. Anywhere in Seven Dials, we can carry out electronic leak detection at your property, on a weekday, Saturday or Sunday. Seven Dials is one of the towns and villages in Greater London we cover.
Electronic leak detection in W1F, W1D and W1T are booked the same way as anywhere else. Whether your property is on Duck Lane, Drury Lane and Bridle Lane or a nearby road, we can help. Main roads around Seven Dials include the A301 and A400, which makes travel easy. Close by, we survey roofs in St Giles (1 mile north), West End (1 mile west), Soho (1 mile west), Covent Garden (1 mile east) and Chinatown (1 mile south-west). Further out, we also cover Kensington (3 miles west), Walthamstow (7 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).
Around Seven Dials
We work in homes and buildings around London Nautical School, St Anne's Churchyard and LSE Shaw Library, among other places. Other local landmarks include Two Brewers pub (less than half a mile south-west) and Mercers' School (0.8 miles east). There is a railway station in Seven Dials itself: Tottenham Court Road station. Other landmarks nearby include Kingly Court (0.5 miles west) and St Paul's Hospital (within half a mile north-east). Open spaces near Seven Dials include Barnsbury Wood and Ludgate Hill.
Before and after the survey
There is plenty you can do without going near the roof. Here’s what helps most:
- Let us know about the membrane and build-up if you know it
- Do not keep patching the same spot
- Don’t leave water getting in
- Clear flat roof outlets regularly
File the report with your roof paperwork. It is a dated record of the membrane’s condition.
Limit foot traffic on flat roofs. Feet and dropped tools are a common cause of holes.
Checking the roof from the ground
A DIY look is useful, but it isn’t a survey. You will not see flashings, valleys or the backs of chimneys properly 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. Leave anything above ground level to a survey.