Greater London · London and the South East
Electronic leak detection in Keston, Greater London
Electronic leak detection in Keston and the rest of Greater London. We survey on weekdays, Saturdays and Sundays.
- New roofs to check before paving or planting
- Repairs that haven’t stopped the leak
- Leaks under green or ballasted roofs
Electronic leak detection in Keston
Green roofs, ballasted roofs and roofs under paving are harder to test. What sits on the membrane can affect which method will work, and some may need lifting. We talk this through before we quote. Any details of the build-up help, as they show what lies beneath the surface. We’ll tell you if the roof can’t be tested. We survey liquid-applied waterproofing, green roofs and commercial flat roofs, and the problems we’re asked to look at most are repairs that haven’t stopped the leak and gaps at membrane joints.
Offices, shops and blocks of flats across London frequently have large flat roofs with plant, rooflights and walkways. Every penetration and upstand is a place where a membrane can fail. For a building in Keston, access is agreed with whoever manages the roof before the visit. Rooflights, plant supports and pipe entries are common places for a membrane to fail.
The report is written in plain words, so it makes sense without any roofing background. Photographs show what each point refers to, and recommendations are put in order of urgency where relevant.
- Location
- Keston (BR2)
- Region
- Greater London
- Price
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Survey days
- Weekdays, Saturdays and Sundays
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
What we look for on each type of roof
Green and ballasted roofs
Some layers may need lifting for testing. We discuss this before quoting.
Liquid-applied waterproofing
Liquid waterproofing has no laps, but can still have thin spots or holes. Whether ELD works depends on the coating and build-up.
Also in Keston
For landlords and managing agents
With a portfolio of properties, surveys can be booked for more than one address. To discuss a number of properties, ring 07833 053749 or use the contact form.
A roof problem in a let property affects your tenants as well as the building. A survey shows what needs attention, so you can plan the work.
Electronic leak detection around Keston
Outer London has a good many Victorian and Edwardian terraces with slate roofs, but also a great many interwar semis, often with hipped roofs in 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. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere. About 2.2 miles south-east lies Down House, a reminder of how long the area around Keston has been built on. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and the council can say whether a home is in a conservation area.
Take a building like Keston Church of England Primary School: a large flat roof with a good many outlets and rooflights has many places where a membrane can fail. If your home is one of the older ones in the streets near Keston Parish Church, later flat-roofed additions are common on older houses, and their edges and upstands often show the first signs of wear. Keston is in London, so parking needs planning: let us know about permits, visitor bays or off-street space when you book.
Keston is about 3 miles south of Bromley, in Greater London. We survey roofs in Keston across London and South East England. Our area takes in places right across Greater London. You can also see our page for London.
We work across the BR2 postcode area for electronic leak detection and the streets around it. We offer electronic leak detection to properties on Church Road, Greys Park Close and Heathfield Road and the roads around them. Nearby, we also carry out electronic leak detection in Nash (1 mile west), Farthing Street (1 mile south-east), Locksbottom (1 mile north-east), Leaves Green (2 miles south) and Hayes (2 miles north-west). Larger places within reach include London (11 miles north-west), City of Westminster (13 miles north-west), Marylebone (13 miles north-west), Kensington (14 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north).
Near you in Keston
Around Keston, our work takes us to homes and buildings near South Park, Ravens Wood School and The Greyhound pub. Keston’s nearest station is Hayes (Kent) station, roughly 1.5 miles north-west of the centre. Other landmarks nearby include Princess Royal University Hospital (1.1 miles east) and Bethlem Museum of the Mind (1.5 miles north). Not far away are West Kent Golf Course nature reserve and Summer Hill.
What happens on the day
We look at the roof from outside and, where it’s relevant and there is safe access, from inside the loft space too. In the loft, the signs we look for are staining, damp, daylight and sagging. The whole visit normally takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. Many London properties are flats or terraces with no side access, so the back of the roof is often seen from upstairs windows, from inside or, where a flight is allowed, from the air. If the building has a managing agent or access rules, tell us as you book.
- First, we confirm which roof areas are included.
- The surface is prepared for the chosen method.
- We work across the roof with the test equipment.
- Each breach found is located and recorded.
- The report is sent for your roofer to act on.
Preparing for the visit
- Buyers: confirm access with the estate agent or seller
- Keep pets in another room
- Dig out any old roof reports or invoices
Booking a survey
Photos help, if you have them. Pictures from ground level or a window are fine; never climb up to get a better view. To get started, call 07833 053749 or use the contact form.
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Your questions about electronic leak detection in Keston
Will parking be an issue for a roof survey in Keston?
Sometimes, yes. If Keston has controlled parking where you are, a visitor permit is the easiest answer, and a driveway is even better.
Is my home in Keston listed or in a conservation area?
Your council is the best source, with Historic England’s list for listed buildings. A change of roofing material may need consent in either case, and councils can also use Article 4 directions.
How long have you been surveying roofs?
More than 5,000 surveys over 20+ years, across London and South East England.
How much time does ELD need?
It usually takes more time on a big roof than a small one, with the construction of the roof playing a part too.
I live in a flat. Can you survey the roof?
Yes, once whoever controls the roof agrees access. We look at the parts we are given access to, and the report makes that clear.
Do you use low-voltage or high-voltage testing?
The method is chosen to suit the roof. Low-voltage testing typically needs a wet surface and high-voltage methods need the membrane dry and exposed.
Does this replace a RICS home survey?
No. Our survey looks at the roof, not the whole building. If you need a full building survey, you will need a RICS survey as well.
DIY checks: what’s safe
Inside, the loft is a good place to look, with care. Use a torch and stay on the joists or boards, and look for staining, damp timber or daylight coming through.
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.
Prices for electronic leak detection in Keston
Several things affect the price of a survey:
- Roof area
- If the survey needs thermal imaging or a drone
- Extra roofs, like extensions, dormers or garages
- The type of building, from a house to a block or an office
For a price for your roof in Keston, call 07833 053749 or use the contact form with the address and some details. The price is agreed before a date is set.
Booking your survey
These details help when you contact us:
- Access details, such as a loft hatch or a shared roof
- The reason for the survey, like buying, a leak or storm damage
- Your postcode, so we can check access and travel
- What kind of property and roof it is
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, call 07833 053749 or drop us an email with the address and the days you’d prefer.
Leave it or get it looked at?
Leaks left running can wet the insulation and deck. Locating it early helps limit the damage. In a London terrace or conversion, a roof defect rarely stays your problem alone: failed flashings and blocked valley gutters can send water into more than one home. Finding it early keeps the work smaller.
Larger roofs, taller buildings and commercial roofs take longer, so they’re priced to match. The price is confirmed before you book.
Why us?
- More than 20 years surveying roofs
- CAA-registered drone operator (Flyer ID and Operator ID)
- Every finding written up with photos
- Independent findings on the roof’s condition