Surrey · London and the South East
Electronic leak detection in Farnham, Surrey
Electronic leak detection to pinpoint holes in flat roof membranes in Farnham. We have completed more than 5,000 surveys across London and South East England.
- Damp inside with no sign on the roof
- Gaps at membrane joints
- Holes left by work on the roof
About our electronic leak detection in Farnham
Electronic testing locates holes in the waterproofing but not every way water gets in. Leaks from walls, copings, rooflights or pipes need other checks. We will tell you if we think the leak is coming from somewhere else. The test shows breaches in the membrane, not water coming through masonry or around frames. Our report keeps that distinction clear. You’ll also know what to check next. We survey commercial flat roofs, roof terraces and balconies and green roofs, and common reasons people get in touch are leaks through a covered membrane and waterproofing to test before it’s covered.
Garages and porches on estates in towns like Farnham often have flat roofs. Some older garages have cement sheet roofs, which on buildings from before 2000 may contain asbestos, which a specialist asbestos surveyor should check before anyone disturbs them. Felt, rubber and fibreglass coverings each need a different approach. Asbestos testing isn’t part of what we do, though a report may flag materials that could contain it.
Where we can’t see part of the flat roof membrane, the report says so. That way, it’s clear what was covered and what wasn’t, and what we’d suggest next.
- Where
- Farnham (GU9, GU10)
- Region
- Surrey
- Price
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
DIY checks: what’s safe
After strong wind, take a look from the pavement or garden: pieces of tile or slate on the ground, a gap in the ridge or a lifted flashing are all worth noting. Leave anything above ground level to a survey.
It is useful to keep a record: when leaks happen, ground-level photos and any past roof work. Share it with us as you book and it will help the survey.
Electronic leak detection around Farnham
There are several hotels within about a mile and a half of Farnham, and like offices and blocks, hotels often sit under flat roofs. If you look after one, a leak through a flat roof can put a room out of use. Many older homes in Surrey have handmade clay tiles and tile-hung upper walls. Some old buildings in Surrey and Sussex have Horsham stone slab roofs. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
Hotels and guest houses near Farnham cannot easily close rooms for a leak, so it pays to find faults before guests do. Historic houses like Farnham Castle, about 0.6 miles north-west, show how far back building around Farnham goes. Older houses nearby frequently have flat roofs added much later, built to very different standards from the main roof. Take an older house close to St Joan of Arc's Church: the flat roofs on later extensions tend to wear out long before the main roof.
Farnham is about 6 miles south of Farnborough, in Surrey. Surveys in Farnham work the same way as everywhere we cover: a careful inspection, photographs and a written report. Across Surrey, we cover Farnham and the places around it. We also survey roofs in Guildford.
All of GU9 and GU10 is covered for electronic leak detection. If you need electronic leak detection at a property on Barncroft, Approach Road and Saxon Croft or anywhere close by, we can survey it. With the A31 and A287 close by, Farnham is simple for us to get to. Close by, we survey roofs in Compton (1 mile east), Hale (1 mile north), Upper Hale (2 miles north), Runfold (2 miles east) and Heath End (2 miles north). Further out, we also cover Guildford (10 miles east), Woking (12 miles north-east), Camberley (9 miles north), Frimley (8 miles north), Haslemere (9 miles south) and Cranleigh (14 miles east). As one of the bigger places in Surrey, Farnham has every kind of building, from houses and flats to offices.
Landmarks near Farnham
Around Farnham, our work takes us to homes and buildings near Moor Park, William Cobbett Public House and Weydon School, among other places. There is a railway station in Farnham itself: Farnham station. A little further out are Museum of Farnham (less than half a mile north-west) and Farnham Castle (0.6 miles north-west). Green spaces nearby include Farnham Park and Aunt's Pool.
Why act early in Farnham
Patching where you think the leak is often misses it. Testing shows where the membrane is actually breached. Around Farnham, water from a roof defect frequently goes unseen for a while, such as the loft insulation, the top of a wall or the roof timbers. By the time it shows inside, the job has grown.
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. The price is confirmed before you book.
Why book us in Farnham
- Thermal imaging and drones used where they help
- An independent view of the roof
- Professional indemnity and public liability insurance
- Every finding written up with photos
How the survey changes by roof type
Green and ballasted roofs
ELD is easier on a new roof before it’s covered.
Liquid-applied waterproofing
Liquid waterproofing has no laps but holes and thin areas can occur. Suitability for ELD depends on the system.
Farnham: your questions answered
How do I find out if my home in Farnham is listed?
We can’t confirm that for you, but Historic England’s list and your council can. A change of roofing material may need consent in either case.
Do you carry out roof surveys in Farnham?
Yes. Our area covers London and the South East, and Farnham is part of that. Just phone 07833 053749 or drop us an email and let us know about the property.
Can you give me structural calculations?
No. Visible signs such as deflection or sagging are recorded, but calculations and an engineer’s opinion are outside what we do. If one is needed, the report says so.
What do I do with the report?
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.
How long will testing take?
It depends on the size of the roof and its build-up. You will know roughly how long before we start.
Does the report include photos?
Yes. We photograph the roof as we go, and the report uses them to show each finding alongside our recommendations.
Can every flat roof be tested?
It depends on the membrane and the build-up. Let us know what you know about the roof and we’ll confirm suitability.
What this survey cannot tell you
Some things can’t be seen without opening up the roof, so a survey has limits:
- Build-ups without a suitable layer below
- The extent of water in the insulation
- Repairing the breaches (that is for your roofer)
If you are not sure which survey you need, phone 07833 053749 or use the contact form and we will give you a straight answer. The full list of what we check.
Roof types and parts we check
- Flat roof membranes
- Single-ply roofs
- Commercial flat roofs
- Liquid-applied waterproofing
- Roof terraces and balconies
- Green roofs
What happens on the day
After the inspection, everything we found is written up as a written report with photos, emailed to you. On timing, it normally takes more time on a big roof than a small one, and the build-up of the roof makes a difference too. In Farnham, parking is rarely complicated, though it helps to know about driveways or restrictions. The inspection covers what can be seen safely from outside, from windows and from the roof space, and from the roof itself where it’s safe.
- We agree the area to be tested.
- The surface is prepared for the chosen method.
- We work across the roof with the test equipment.
- Each breach found is located and recorded.
- You receive the results to pass to your roofer.
How to prepare
- Jot down any questions you want answered
- Mention any parking restrictions on your street
- Check we can get to the back of the property
Arrange a survey
A quick phone call is typically the easiest start: call 07833 053749 or email us and we will ask a few questions about the roof. You’ll have a price before anything is arranged.
Read more
Towns and villages near Farnham
More services for Farnham
What a survey costs
We confirm the price for the job before you book. These are the things that affect it:
- Extra roofs, like extensions, dormers or garages
- The roof’s overall size
- Whether thermal imaging or a drone is needed
- How complicated the roof is, with its valleys, chimneys and parapets
To find out what your survey will cost, call 07833 053749 or send us an email with the address and some details. The price is agreed before a date is set.
Helping us price your survey
Here’s what helps us most when you contact us:
- What kind of property and roof it is
- Any stains, drips or damp patches you’ve seen indoors
- The address and postcode of the property
- Pictures of the roof from a safe spot, if you have them
If you have photos of the roof, send them over. Pictures from ground level or a window are fine, and please do not climb up for a closer look. To get started, phone 07833 053749 or use the contact form.