Hertfordshire · London and the South East
Electronic leak detection in Cottered, Hertfordshire
Electronic leak detection in Cottered from an independent, experienced roof surveyor. Over 5,000 surveys and 20+ years behind us across London and South East England.
- Holes left by work on the roof
- Leaks through a covered membrane
- Patched roofs that still leak
Electronic leak detection in Cottered
Electronic leak detection, or ELD, finds holes in flat roof waterproofing membranes. It uses a small electrical current that passes through the membrane only where there’s a breach. It can find holes too small to spot by eye so your roofer knows exactly where to repair. The results come in a report with photos. Common reasons to book are leaking laps in the waterproofing and holes left by work on the roof, on liquid-applied waterproofing, green roofs and roof terraces and balconies.
In a village or hamlet like Cottered, flat roofs are usually on extensions, garages, outbuildings or barn conversions. The checks are the same as anywhere: the covering, the edges, the upstands and where water drains away. The journey and access are planned beforehand. If there are outbuildings or garages with flat roofs, mention them when booking.
The report doesn’t just list problems. For each finding, it explains what it is, why it matters and what we’d recommend, so you can decide what to do next.
- Where
- Cottered (SG9)
- Wider area
- Hertfordshire
- Cost
- Quoted for your roof
- Report
- A written report with photos, by email
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Tips from our surveys
Here are a few things we’d tell any owner, before and after a survey:
- Check new waterproofing before handover
- Keep outlets clear of debris
- Find the breach before more patching
- Tell us about the membrane and build-up if you know it
You receive a report showing where each breach was found, with photographs. Pass it to your roofer to repair the breach points.
ELD before paving, ballast or planting goes on is worth considering. Finding breaches is simpler at that stage.
Also in Cottered
Why act early in Cottered
Leaks left running can wet the insulation and deck. Locating it early helps limit the damage. Outbuildings and barns around Cottered are easy to forget, but a failed roof there can spoil what’s stored inside. A quick look before winter can save a lot.
Every price we give includes VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You’ll know the price for your roof before you book.
Why choose Independent Roof Survey in Cottered
- Weekday and weekend surveys
- Independent findings on the roof’s condition
- Every finding written up with photos
- 5,000+ roofs surveyed
Take a look at what a roof survey costs or what we found on two real jobs.
Electronic leak detection around Cottered
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. Across the South East, older homes tend to have slate or clay tiles, and many later ones concrete tiles, with flat-roofed extensions, dormers and garages common everywhere. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere.
For site and facilities teams at buildings such as Freman College, schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Cottered is about 5 miles north-east of Stevenage, in Hertfordshire. Wherever you are in Cottered, we can carry out electronic leak detection at your property, on a weekday, Saturday or Sunday. Our Hertfordshire coverage includes Cottered. We also survey roofs in Chelmsford.
All of SG9 is within our area for electronic leak detection, from the main roads to the quietest streets. Streets in the area include Peasecroft, The Crescent and Warren Lane, all of which we cover. We also cover Throcking (1 mile north-east), Rushden (2 miles north-west), Chipping (2 miles north-east), Buntingford (2 miles east) and Aspenden (2 miles east). Further out, we also cover Stevenage (5 miles south-west), Bishop's Stortford (11 miles south-east), Welwyn Garden City (11 miles south-west), Harpenden (15 miles south-west), Hitchin (8 miles west) and Hoddesdon (13 miles south).
Landmarks near Cottered
In Cottered, that means homes and buildings near The Bull Public House, among other places. Other landmarks nearby include Clothall Castle (3.5 miles north-west). For a walk, there’s Hawkins Wood.
What we can’t see
In fairness, a roof survey has limits:
- Moisture spread under the membrane
- Roofs whose membrane or build-up isn’t suitable
- Parts of the roof covered by fixed equipment
If in doubt, call 07833 053749 or email us and we will point you to the right survey before you book. What a survey covers and doesn’t.
What we look at
- Flat roof membranes
- Liquid-applied waterproofing
- Single-ply roofs
- Roof terraces and balconies
- Commercial flat roofs
- Green roofs
How the survey works
Photos are taken throughout the visit, so you can see in the report what we found and where. We take close-ups from wherever is safe. Most surveys take longer on a large roof than a small one, and the build-up of the roof makes a difference too. Rural addresses near Cottered can be hard to find from a postcode alone, so a few directions, or a note of a nearby landmark, help us arrive on time. After that, the survey runs as it would anywhere.
- We agree the area to be tested.
- The surface is prepared for the chosen method.
- Testing runs across the agreed area.
- We mark the breach locations in our records.
- The report is sent for your roofer to act on.
Getting ready for the survey
- Unlock side gates and any roof access doors
- If it isn’t your property yet, arrange access through the agent
- Show us where any leaks or stains appear
How to book
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, phone 07833 053749 or drop us an email with the address and the days you’d prefer.
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Surveys for landlords and agents in Cottered
Landlords and letting agents in Cottered book surveys as well as householders. A written report with photos gives you a clear record of the flat roof membrane.
Any of our surveys can be booked by landlords, agents and building managers in Cottered. For a price for a let property or a block, phone 07833 053749 or drop us an email.
When to book a survey in Cottered
A breach can be left during installation. Testing before the roof is covered or handed over helps find them.
A survey makes sense if you’ve noticed:
- Leaks showing away from the breach
- Repairs that haven’t stopped the leak
- Breaches hidden under paving or planting
- Failed seams and laps
If you own one of the older houses in the streets near Parish Church of St John the Baptist, the flat roofs on later extensions tend to wear out long before the main roof.
What to check before booking
- Their drone registration, if they fly one
- Whether the loft is part of the inspection
- Which limits apply to the survey
- What exactly goes into their report
FAQs for Cottered
Do you cover Cottered?
We do. The survey and report are the same in Cottered as anywhere else, and visits run on weekdays and weekends.
Will you come out to Cottered?
Yes, we do. We work right across London and South East England, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
What does electronic leak detection do?
A sound membrane blocks the test current, but a hole lets it through. That lets us find breaches that are too small to see.
Will I get photos?
Yes. Photographs are taken throughout the survey, and the report uses them to show each finding alongside our recommendations.
How is ELD priced?
We quote electronic leak detection for each roof, as the method and time depend on the roof. The price depends on the roof’s size and build-up. For a quote, ring 07833 053749 or drop us an email.
Do you carry professional indemnity insurance?
Professional indemnity and public liability insurance cover our surveys. If you need details for a managing agent or a building owner, just ask.
What happens next?
The report comes by email, and you decide the next step: use it with a seller, an insurer, a roofer or a managing agent.