Surrey · London and the South East
Electronic Leak Detection in Walliswood
Electronic leak detection in Walliswood from an independent, experienced roof surveyor. More than 20 years and over 5,000 surveys across London and South East England.
- Damage from equipment installers
- Leaking laps in the waterproofing
- Leaks at pipes, outlets or fixings
What we’re asked to look at in Walliswood
If a flat roof keeps leaking after patching, the hole may be elsewhere. ELD can locate the breach more precisely.
These are some of the problems a survey can pick up:
- Failed seams and laps
- Repairs that haven’t stopped the leak
- Breaches hidden under paving or planting
- Leaks showing away from the breach
If you own a rental within reach of Ockley station, flat roofs over rear additions and dormers in rented property are worth checking between tenancies.
What to check before booking
- How long they’ve been surveying roofs
- How soon the report will arrive
- What the report includes, and whether it has photographs
- Whether the loft space is looked at, where there is one
How electronic leak detection works in Walliswood
Green roofs, ballasted roofs and roofs under paving are harder to test. What sits on the membrane can affect which method will work and parts may need to be lifted. We talk this through before we quote. Drawings or details of the roof’s layers are useful because they show what’s under the surface. We’ll tell you if the roof can’t be tested. Common reasons to book are damage from equipment installers and failed seams and laps, on green roofs, single-ply roofs and flat roof membranes.
Somewhere as small as Walliswood, flat roofs tend to be on extensions, garages and converted outbuildings. The checks are the same as anywhere: outlets, upstands, edges and the covering itself. The journey and access are planned beforehand. If there are outbuildings or garages with flat roofs, mention them when booking.
The report works through the roof section by section, from the coverings down to the gutters, each with a short note and a photograph. It records what’s sound as well as what isn’t.
- Where
- Walliswood (RH5)
- Region
- Surrey
- Price
- Quoted for your roof
- Your report
- A written report with photos, by email
- When we survey
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Call
- 07833 053749
- Updated
- 27 October 2026
How it works
We photograph the roof as we go, so you can see in the report what we found and where. Close-ups come from the safest viewpoint available, including by drone where it’s applicable and the weather allows. A typical visit takes longer on a large roof than a small one, with the construction of the roof playing a part too. Somewhere as small as Walliswood, access is frequently the only tricky part. Mention any outbuildings, barns or garages you want included, and anything about the roof you already know. Weekday and weekend visits are available.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We check that the membrane and build-up suit electronic leak detection.
- The method depends on the membrane and what sits above and below it.
- Testing runs across the roof to locate breaches in the membrane.
- The breaches are recorded with photos in a report for your roofer.
Before we arrive
- Dig out any old roof reports or invoices
- Tell us about any leaks, stains or damp patches you know of
- Move anything stored under the loft hatch
Getting a price
To get a price for electronic leak detection in Walliswood, phone 07833 053749 or email us. A few details about the property and the roof help us give you an accurate price.
Related advice
What you can safely check yourself
It is useful to keep a record: dates of leaks, photos from ground level and any work done on the roof. Share it with us when you book, as it helps us focus the survey.
Inside, the loft is a good place to look, with care. Take a torch and only step on boards or joists, and look for staining, damp timber or daylight coming through.
Common questions in Walliswood
Do you cover Walliswood?
Yes. We work right across London and South East England, and Walliswood is part of that. Just phone 07833 053749 or email us and let us know about the property, and we will talk through which survey suits.
Will you come out to Walliswood?
Yes, we do. We cover the whole of London and South East England, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Are you structural engineers?
No. We’re roof surveyors, not structural engineers, and it doesn’t include calculations. We’ll recommend an engineer if we see signs that call for one.
What does electronic leak detection do?
ELD passes a small electrical current across the roof to locate holes in the membrane. A breach lets the current through so we can pinpoint it.
What do I do with the report?
We email you the written report with photos and recommendations. You can use it to talk to a seller, an insurer, a roofer or a managing agent, whichever applies.
Do you carry out surveys on Saturdays and Sundays?
We survey seven days a week: weekdays, Saturdays and Sundays. Tell us which days suit you when you book.
Will you walk on the roof?
Only if it’s safe. We check everything that can be seen safely: from ground level, from windows, from inside the roof space, from the roof where it is safe and by drone where applicable. Anything we can’t see is noted in the report.
Roof by roof
Inverted and paved roofs
On inverted roofs, insulation sits above the membrane and that changes how testing works.
Liquid-applied waterproofing
What lies under a liquid coating decides if ELD will work.
Flat roofs in Walliswood
Many older homes in Surrey have handmade clay tiles and tile-hung upper walls. Horsham stone slab roofs survive on some old buildings in Surrey. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere. What can be done to an older roof may depend on listing or a conservation area. Your council and Historic England’s list will tell you where you stand, ideally before any re-roofing is planned.
If you live in an older home near Church of St John the Baptist, later flat-roofed additions are common on older houses, and their edges and upstands often show the first signs of wear.
Walliswood is about 6 miles north-west of Horsham, in Surrey. We carry out electronic leak detection in Walliswood for houses, flats, blocks and commercial buildings. Our area takes in places right across Surrey. You can also see our page for Crawley.
Every address in RH5 is covered for electronic leak detection, from the main roads to the quietest streets. If you need electronic leak detection at a property on Horsham Road, Standon Lane and Oakfields or anywhere close by, we can help. Neighbouring places we cover for electronic leak detection include Mayes Green (1 mile north), Ewhurst Green (2 miles north-west), Ellen's Green (2 miles south-west), Ewhurst (2 miles north-west) and Cranleigh (4 miles west). Within a short drive, we also cover Guildford (11 miles north-west), Woking (15 miles north-west), Epsom (15 miles north), Horley (11 miles east), Redhill (12 miles north-east) and Reigate (11 miles north-east).
Local landmarks in Walliswood
We work in homes and buildings around Wallis Wood and The Scarlett Arms Public House, among other places. For rail, the closest station is Ockley station, roughly 3.1 miles north-east of the centre. Nearby you will also find Abinger Castle (4.8 miles north) and Horsham Hospital (5.5 miles south-east). Not far away are Vann Lake and Leith Hill.
Tips that help
Getting the most from electronic leak detection starts before we arrive and carries on afterwards. Tips:
- Tell us about the membrane and build-up if you know it
- Get leaks traced quickly
- Keep a note of leaks after rain
- Check new waterproofing before handover
If water has been getting in, insulation under the membrane may be wet. That is something to discuss with your roofer and other checks can help judge it.
Consider testing a new membrane before it’s covered. Finding breaches is simpler at that stage.
Also near Walliswood
More services for Walliswood
How we price electronic leak detection
We confirm the exact price before booking. These are the things that affect it:
- Commercial roofs and larger buildings
- Building height and the viewpoints available
- Chimneys, valleys, parapets and other details
- The number of roofs, including extensions and garages
What a survey costs comes down to the roof itself: its size, its height, how many sections it has and how safely it can be seen. Electronic leak detection is quoted for your roof, because the method depends on the roof.
Helping us price your survey
What helps most when you contact us:
- Whether there is a loft hatch, a shared roof or tricky access
- Any photos you have, taken from the ground or a window
- Where water is showing inside, if it is
- What kind of property and roof it is
We survey roofs on any day of the week. To arrange a day that suits you, ring 07833 053749 or use the contact form.