Greater London · London and the South East
Electronic Leak Detection in Childs Hill
Electronic leak detection to pinpoint holes in flat roof membranes around Childs Hill, with findings in writing and pictures to back them up. Book a weekday or weekend visit.
- Stains far from any visible defect
- Failed seams and laps
- New roofs to check before paving or planting
How electronic leak detection works in Childs Hill
ELD can be carried out in more than one way. Low-voltage methods typically need a wet roof surface and high-voltage methods need the membrane dry and exposed. Which one suits depends on the membrane and the layers of the roof and we explain which we’ll use. If neither method suits your roof, we’ll tell you before any testing starts. If you’re worried about water coming in under a flat roof and patched roofs that still leak, we can find out what’s behind it.
Commercial and residential blocks across London frequently have big flat roofs with plant, rooflights and access walkways. Every penetration and upstand is a place where a membrane can fail. For a building in Childs Hill, access is agreed with whoever manages the roof ahead of the visit. Plant bases, rooflights and cable entries are all places where water can get in.
The report is yours to share with whoever needs it: a seller or estate agent, an insurer, a roofer, a builder or a managing agent.
- Location
- Childs Hill (NW2, NW3, NW11)
- Region
- Greater London
- Prices
- Quoted for your roof
- Your report
- A written report with photos, by email
- Survey days
- Monday to Sunday, daytime
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
Your questions about electronic leak detection in Childs Hill
Do you look at commercial flat roofs near Childs Hill, such as hotels?
Yes, commercial flat roofs are part of what we cover. For a bigger roof, you’ll get a quote based on the building, and roof access is agreed with you before the visit.
Is parking a problem for a survey in Childs Hill?
It depends on the street. If Childs Hill has controlled parking where you are, a visitor permit is the easiest answer.
Do you look in the loft space?
If it’s needed and safe to reach, yes. We look for staining, damp, daylight and signs of movement, as far as the space allows.
How long does electronic leak detection take?
It typically takes a length of time set by the membrane area and the build-up, which we’ll explain when we quote.
Which days do you carry out surveys?
We carry out surveys on any day of the week. To find a day that suits you, phone 07833 053749 or email us.
Can you tell me if my roof has asbestos?
No. We do not carry out asbestos surveys or testing. If we see materials that could contain asbestos, like cement roof sheets or soffits on buildings from before 2000, we flag them and suggest a specialist asbestos surveyor checks them before any work.
Will you go up on the roof?
Not unless it’s safe. Most of what we need can be seen from safe viewpoints, the loft and, where it applies, a drone, and the report notes anything we couldn’t see.
For landlords and managing agents
We survey roofs for landlords and letting agents as well as householders. A report with photographs gives you a clear record of the flat roof membrane.
Surveys can also be booked by buyers’ agents acting for a client. The report is emailed, so it can go straight to your client.
Signs you need electronic leak detection in Childs Hill
Joints and laps in a membrane can fail over time. A gap that’s hard to see can let water in for months before it shows.
People typically book a survey when they’ve noticed something like this:
- Water coming in under a flat roof
- Breaches hidden under paving or planting
- Gaps at membrane joints
- New membranes needing a check before handover
Shop and office owners around O2 Centre may find that outlets and upstands on commercial flat roofs are the places to check before trouble starts.
Before booking any roof surveyor
- Whether you can ask questions once you have the report
- Will the report include photos?
- Their report turnaround times
- How they’ll see the roof: from ground level, the loft, the roof or by drone
What a survey costs
Prices always include VAT. What changes the price is:
- The size of the roof
- How many separate roofs there are, like extensions, dormers and garages
- The type of building, from a house to a block or an office
- How tall the building is and how easy the roof is to see
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 your survey before booking.
What to tell us when you contact us
To price your survey accurately, we will ask about:
- Whether there is a loft hatch, a shared roof or tricky access
- The address and postcode of the property
- The reason for the survey, like buying, a leak or storm damage
- Your timetable, such as an exchange date
You can call us seven days a week, including Saturdays and Sundays. To book or ask a question, call 07833 053749 or email us.
What happens on the day
Time on site depends on the size and shape of the roof; as a rough guide, the survey takes more time on a big roof than a small one, with the construction of the roof playing a part too. If you have questions on the day, just ask. In converted houses and mansion blocks, the loft hatch is frequently on a shared landing. If that applies to your building, it is useful to agree access with the neighbours or the managing agent first. Otherwise, the visit in Childs Hill runs like any other.
- We agree the area to be tested.
- We get the roof ready for testing.
- Testing runs across the agreed area.
- Each breach found is located and recorded.
- You receive the results to pass to your roofer.
Getting ready for the survey
- Keep pets inside or away from the areas we are looking at
- If you are buying, check with the agent that we can get in
- Gather any invoices or paperwork from past roof work
How to book
We survey roofs on any day of the week. To arrange a day that suits you, ring 07833 053749 or send us an email.
Advice
Also near Childs Hill
Other services in Childs Hill
What happens if roof problems are left?
Some breaches are too small to see. ELD picks up breaches a visual check might miss where the roof suits it. 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 frequently older than it looks.
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. You’ll know the figure before booking.
Why book with us
- Drone flown under a CAA Flyer ID and Operator ID
- 98% customer satisfaction
- Every finding written up with photos
- Two decades and more of roof surveys
Read our cost guide and two real surveys.
Flat roofs in Childs Hill
About 0.7 miles east lies Heath House, a reminder of how long the area around Childs Hill has been built on. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof, and any change of roofing material on a listed home needs checking with the council first. Within a mile and a half or so of Childs Hill there are several hotels, and hotels, like offices and blocks of flats, often have flat roofs. If you look after one, a leak through a flat roof can put a room out of use.
The streets around a church such as All Saints are often among the oldest in a place, and if yours is one of the older homes nearby, the flat roofs on later extensions tend to wear out long before the main roof. A roof leak in a hotel or guest house around Childs Hill means lost rooms as well as repairs, so it is worth knowing the roof’s condition.
Childs Hill is about 1 mile north-west of West Hampstead, in Greater London. We carry out electronic leak detection in Childs Hill for houses, flats, blocks and commercial buildings, with a written report and photographs every time. Childs Hill is one of the places in Greater London we cover. There’s also a page for London.
All of NW2, NW3 and NW11 is within our area for electronic leak detection, from the main roads to the quietest streets. Whether your property is on Nant Road, Ridge Road and Garth Road or a nearby road, we can survey it. Close by, we survey roofs in Fortune Green (1 mile south), West Hampstead (1 mile south-east), Golders Green (1 mile north), North End (1 mile north-east) and Vale of Health (1 mile east). We also work in nearby towns such as London (6 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south), St Pancras (4 miles south-east) and Shoreditch (6 miles south-east).
Landmarks near Childs Hill
Typical jobs here are in homes near St Vedasts School For Boys, Hampstead School and The Old Bull and Bush pub, among other places. Childs Hill’s nearest station is Cricklewood station, roughly 0.7 miles south-west. Well-known places in the area include O2 Centre (1.2 miles south-east) and New End Hospital (0.9 miles east). Green spaces nearby include Parliament Hill and Westbere Copse.
What this survey can’t tell you
A survey is a careful look at the flat roof membrane, but it can’t do everything. Its limits include:
- Moisture spread under the membrane
- Carrying out the repair work
- Leaks from plumbing or windows
If in doubt, ring 07833 053749 or drop us an email and we’ll suggest the right survey. What our survey covers.
Roofs we survey in Childs Hill
- Liquid-applied waterproofing
- Green roofs
- Single-ply roofs
- Flat roof membranes
- Roof terraces and balconies
- Commercial flat roofs