Hertfordshire · London and the South East
Electronic leak detection in Farnham, Hertfordshire
Electronic leak detection to pinpoint holes in flat roof membranes across Farnham, using drones and thermal imaging where it applies. Call or email for a price.
- Damp inside with no sign on the roof
- Leaks through a covered membrane
- Water coming in under a flat roof
What we cannot see
A survey is a close look at the flat roof membrane, but it can’t do everything. The main limits are:
- Repairing the breaches (that is for your roofer)
- Sections we can’t safely access
- Leaks from walls, copings or rooflights
If you’re not sure which survey you need, phone 07833 053749 or drop us an email and we will give you a straight answer before booking. What our survey covers.
Roofs we survey in Farnham
- Commercial flat roofs
- Liquid-applied waterproofing
- Roof terraces and balconies
- Flat roof membranes
- Single-ply roofs
- Green roofs
About our electronic leak detection in Farnham
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 is testing only and leave the repair to your roofer. On suitable roofs, it replaces guesswork with a located breach. The results then follow in a written report with photos. Typical surveys look at punctures from foot traffic or tools and stains far from any visible defect, on flat roof membranes, roof terraces and balconies and green roofs.
Older buildings in small places like Farnham may be listed or in a conservation area, which can shape what a new flat roof may look like. If you’re planning work, check with the council first. Finding out what state the roof is in gives you the facts to plan with. Listed building consent is needed for changes that affect a listed building’s special interest.
We write the report in plain English, so it makes sense without any roofing background. Photographs show what each point refers to, with the urgent items made clear.
- Place
- Farnham (CM23)
- Wider area
- Hertfordshire
- Prices
- Quoted for your roof
- Reports
- Emailed report with photos and recommendations
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Tips that help
A survey works best with a little help from you, before and after. Tips:
- Check new waterproofing before handover
- Clear flat roof outlets regularly
- Don’t leave water getting in
- Keep a note of leaks after rain
Keep the report with the roof’s records. It shows the condition of the membrane on that date.
ELD before paving, ballast or planting goes on is worth considering. It is easier to find holes before more layers are added.
What we look for on each type of roof
Bituminous membranes
Bituminous roofs often have laps and old repairs where breaches occur. We test where the roof suits it.
Liquid-applied waterproofing
Pinholes in a coating can let water through. Where the roof suits it, testing can find them.
For landlords and managing agents
Any of our surveys can be booked by landlords, agents and building managers in Farnham. For a price for a let property or a block, ring 07833 053749 or use the contact form.
Letting agents can arrange access with tenants, at a time agreed in advance. We survey on any day of the week, which can make access easier.
The survey, step by step
Every roof is different, but as a rough guide the survey takes a time that depends on the membrane area and the build-up, which we set out in the quote. If you have questions on the day, just ask. Cottages and farmhouses around Farnham often have roofs at several levels, with lean-tos and outbuildings attached. We work round each section in turn, from the safest viewpoints, and anything we can’t see is noted.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- We choose a low-voltage or high-voltage method to match the roof.
- We test the roof and locate any breaches.
- A report with photographs shows where each breach is.
Before the survey
- Let us know about any leaks, stains or damp patches you know of
- Gather any invoices or paperwork from past roof work
- Leave a clear route to the loft
Arrange a survey
Buyers should book once an offer has been accepted, so there is time to use the report before exchange. Otherwise, simply call 07833 053749 or send us an email whenever suits you.
Advice
Also near Farnham
More services for Farnham
Electronic leak detection around Farnham
Much Hadham Palace, about 4.2 miles south-west, is one of the historic houses in the wider area around Farnham. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and any change of roofing material on a listed home needs checking with the council first. Slate and clay tile are the usual coverings on older South East houses, with concrete tiles on many later estates. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
For an older house near a landmark such as Church of St Mary the Virgin, the flat roofs on later extensions tend to wear out long before the main roof. Landlords with a home close to Stansted Mountfitchet station may find that flat roofs on let property tend to be checked only when they fail, which is the costly way round. Anyone responsible for a site like Farnham Church of England Primary School will know that large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
Farnham is about 2 miles north of Bishop's Stortford, in Hertfordshire. Farnham is part of the area we cover across London and South East England. We cover towns and villages across Hertfordshire, large and small. There’s also a page for Chelmsford.
We cover every part of the CM23 postcode area for electronic leak detection. Neighbouring places we cover for electronic leak detection include Uppend (1 mile north), Mount Pleasant (1 mile north), Manuden (2 miles north-east), Bentfield Green (2 miles east) and Stansted Mountfitchet (2 miles east). Further out, we also cover Stevenage (14 miles west), Hoddesdon (12 miles south-west), Hertford (12 miles south-west), Ware (10 miles south-west), Baldock (15 miles north-west) and Broxbourne (13 miles south-west).
Landmarks near Farnham
We work in homes and buildings around St Mary's Catholic School and the streets around them. Farnham’s nearest station is Stansted Mountfitchet station, roughly 2.4 miles east. Nearby you’ll also find Moated mound (1.7 miles south-west) and Herts and Essex Hospital (2.8 miles south-east). Green spaces nearby include Portingbury Hills and Aubrey Buxton Nature Reserve.
Farnham questions
Do you cover Farnham?
We do. The survey and report are the same in Farnham as anywhere else.
Do you cover smaller places like Farnham?
Yes, Farnham is covered. We survey roofs across London and South East England, and smaller places are part of that. Longer journeys are simply planned ahead of time.
What will the report tell me?
It sets out what we found, why it matters and what we recommend, with photographs throughout. It also says if any part of the roof couldn’t be seen safely.
Are you structural engineers?
No. We point out what can be seen, such as sagging or deflection, but we are not structural engineers and do not carry out calculations. If we think you need an engineer, the report says so.
Do you use drones?
Yes, where it’s applicable. Whether we can fly on the day depends on the weather and the airspace rules. We hold a CAA Flyer ID and Operator ID.
Do you take photos of the roof?
Yes. The report includes photos of what we found.
What’s the price of ELD?
Electronic leak detection is quoted for your roof, because the method depends on the roof. Size, build-up and access all affect the price. To get a quote, ring 07833 053749 or email us.
Can I check my roof myself?
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it, as it helps a surveyor trace the cause.
During heavy rain, look at the gutters from ground level or a window. Overflowing water can be a sign of a blockage or a gutter that has dropped.