Surrey · London and the South East
Electronic Leak Detection in Knaphill
Know where you stand with the flat roof membrane before you spend money on it. Electronic leak detection in Knaphill.
- Leaks showing away from the breach
- Leaks through a flat roof with no obvious cause
- Leaks that return after repairs
Electronic leak detection in Knaphill
A leak in a flat roof often shows up a long way from where the water gets in. That makes leaks hard to trace by eye. ELD tests the waterproofing directly, to find where it has been breached. It’s testing only, and the repair is for your roofer. On suitable roofs, it replaces guesswork with a located breach. We then send you the results in a written report. We survey roof terraces and balconies, liquid-applied waterproofing and green roofs, and the problems we are asked to look at most are new membranes needing a check before handover and leaks under green or ballasted roofs.
Outbuildings, garden rooms and garages in places like Knaphill frequently have flat roofs of their own. They’re rarely looked at until something gets wet. If you want them looked at too, mention them as you book. Felt, rubber and GRP coverings on garages and outbuildings age in just the same way as the main roof’s.
The report works through the roof section by section, from the main slopes down to the gutters and outlets, with a note and a photo for each point. You’ll see the good as well as the bad.
- Location
- Knaphill (GU21, GU24)
- Region
- Surrey
- Price
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Appointments
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Last updated
- 27 October 2026
Leave it or get it looked at?
Chasing a leak again and again is frustrating. A clear record of where the breaches are helps break that cycle. On a bungalow or cottage around Knaphill, the roof sits close to the rooms below, so water can show inside quickly once it gets past the covering. Catching the cause first saves redecorating as well.
The cost of a survey depends on the roof: how big it is, how high it is, the number of separate roofs and how it can be reached and seen safely. We quote electronic leak detection for each roof, as the method and time depend on the roof.
Why us?
- Over 5,000 surveys carried out
- An independent look at the roof
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
- Thermal imaging and drone inspection where they help
Take a look at our cost guide and two real surveys.
What we do, step by step
The visit typically starts outside and finishes in the loft: first the slopes, edges and gutters from every safe viewpoint, then the loft space where it can be reached. In total, it takes longer on a large roof than a small one, and the build-up of the roof makes a difference too. With a bit of garden around a house, as there frequently is around Knaphill, the roof can be viewed from several angles. Let us know if any side is fenced off or hard to reach. Inside, the loft is looked at where it can be reached safely.
- We start with what you know about the roof and the leak.
- We check whether the membrane and build-up suit ELD.
- We choose a low-voltage or high-voltage method to match the roof.
- The membrane is tested and breaches are found.
- You get a report with photos of each breach.
Before the survey
- Clear the way to the loft hatch
- Leave side gates unlocked
- If you’re buying, check with the agent that we can get in
Book a survey
You can call us seven days a week. For a price or to book, call 07833 053749 or use the contact form.
Advice
DIY checks: what’s safe
During heavy rain, look at the gutters from ground level or a window. Overflowing water can point to a blockage or a sagging run.
Inside, the loft is a good place to look, with care. Take a torch and only step on boards or joists, checking for stains, damp wood or chinks of daylight.
What we look for on each type of roof
EPDM rubber roofs
EPDM is a long-lasting flat roof membrane, but can still be punctured.
Bituminous membranes
Bituminous roofs frequently have laps and old repairs that can leak. Testing depends on the roof.
Towns and villages near Knaphill
What else we do in Knaphill
What affects the price in Knaphill
To price your survey, we look at:
- Any need for thermal images or a drone flight
- Height and safe access
- Extra roofs, like extensions, dormers or garages
- Roof area
Bigger, taller and commercial roofs take more time to survey, so they’re priced to match. The price is confirmed before you book.
What we need to know
To price your survey accurately, we’ll ask about:
- How the loft is reached, if there is one
- Any marks or damp showing indoors
- Dates you’re working to, such as exchange
- Pictures of the roof from a safe spot, if you have them
Getting a price is simple: just phone 07833 053749 or send us an email, tell us about the property and we’ll suggest the right survey. The price is agreed up front.
Surveys for landlords and agents in Knaphill
Freeholders and residents’ companies use a roof report to plan and budget, putting the urgent items at the top.
If you own several properties, you can book surveys for several addresses. To arrange surveys for several addresses, ring 07833 053749 or drop us an email with the addresses.
Local flat roofs in Knaphill
In Surrey, older roofs are often handmade clay tile, with tile-hanging on many upper walls. Some old buildings in Surrey and Sussex have Horsham stone slab roofs. Next to the main roofs there is usually a flat roof somewhere, whether on an extension, a garage or a commercial unit. Listing and conservation areas can both shape what roof work is allowed on an older home. Your council and Historic England’s list will tell you where you stand, before anyone quotes for re-roofing.
If you run a business near The Peacocks, flat roofs over shops and units are easy to forget until water comes through a ceiling. Take a building like Knaphill School: large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly. If you live in an older home near St Hugh of Lincoln's Church, later flat-roofed additions are common on older houses, and their edges and upstands frequently show the first signs of wear.
Knaphill is about 2 miles west of Woking, in Surrey. From houses to flats and shops in Knaphill, the roof can be surveyed. Our area takes in places right across Surrey, large and small.
Surveys in GU21 and GU24 work the same way as everywhere else we cover. If you need electronic leak detection at a property on Wood Lane, High Street and Barnby Road or a nearby road, we can survey it. Nearby, we also carry out electronic leak detection in Bisley (1 mile north-west), Sheet's Heath (1 mile south-west), Castle Green (1 mile north), Brookwood (1 mile south-west) and Penny Pot (1 mile north). Further out, we also cover Guildford (5 miles south), Camberley (5 miles west), Epsom (15 miles east), Farnham (11 miles south-west), Egham (8 miles north) and Walton-on-Thames (10 miles north-east).
What’s near Knaphill
Typical jobs here are in homes near Anchor Inn, The Winston Churchill School A Specialist Sports College and Brookwood Lye and the streets around them. Knaphill’s nearest station is Brookwood station, about 1.4 miles south-west. Other landmarks nearby include The Peacocks (2.5 miles east) and Brookwood Hospital (under half a mile south). Not far away are Brookwood Lye.
Common questions in Knaphill
Does a conservation area affect roof work in Knaphill?
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.
Do you cover Knaphill?
We do. Every survey there gets the same written report with photos, and visits run on weekdays and weekends.
What is electronic leak detection?
The waterproofing membrane normally stops an electrical current, so wherever there’s a hole, it passes through. That’s how we locate breaches you cannot see.
Can you inspect my roof with a drone?
Yes, where it is applicable. Our sub-250g drone is flown by a CAA-registered operator with a Flyer ID and Operator ID, and the airspace and weather are checked before every flight.
How soon will I get the report?
The Premium Survey report comes the same day, the Standard within 24–48 hours and the Basic within 48 hours. All of them come by email, ready to forward.
Does someone need to be in?
Someone needs to let us in if we’re looking inside or in the loft. We’ll talk about access when booking.
Does ELD include fixing the breach?
No. We test the membrane and report. You get the breach locations with photos so your roofer can fix them.