Hertfordshire · London and the South East
Electronic leak detection in Thorley Street, Hertfordshire
A careful look at the flat roof membrane at your property in Thorley Street, with photographs and a written report.
- Damage from equipment installers
- Failed seams and laps
- Leaks through a covered membrane
Electronic leak detection in Thorley Street
There are different ELD methods. Low-voltage methods typically need a wet roof surface and high-voltage methods need the membrane dry and exposed. The right method depends on the membrane and the build-up of the roof and we explain which we’ll use. If neither method suits your roof, we will tell you before any testing starts. We survey commercial flat roofs, green roofs and flat roof membranes, and people most often book us about holes left by work on the roof and water coming in under a flat roof.
In a small place like Thorley Street, a flat roof can stand in the open, which is hard on edges, upstands and joins in the covering. Felt roofs, which often last around 15–20 years, usually show it first. Rubber and GRP last longer, though trims and joints still need a look. Exposed edges are typically the first part of a flat roof to go.
The report records the flat roof membrane as we found it on the day. It’s useful right away, and a good reference for later, for instance when you want to check whether anything has changed.
- Place
- Thorley Street (CM23)
- Region
- Hertfordshire
- Cost
- Quoted for your roof
- Reports
- A written report with photos, by email
- When we survey
- Weekdays, Saturdays and Sundays
- Insurance
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
What happens if roof problems are left?
ELD before paving, ballast or planting goes on is simpler. Covered roofs are harder to test. Matching old materials, such as handmade tiles or stone slates, can take time to source. That’s one more reason to find defects before they become urgent.
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. You’ll know the figure before booking.
Why choose Independent Roof Survey in Thorley Street
- Professional indemnity and public liability insurance
- An independent look at the roof
- Plain-English reports with photos
- Thermal imaging and drones used where they help
Take a look at how roof surveys are priced and our case studies.
Places near Thorley Street
What else we do in Thorley Street
Before and after the survey
A survey works best with a little help from you, before and after. Tips:
- Clear flat roof outlets regularly
- Find the breach before more patching
- Consider ELD before paving or planting goes on
- Keep foot traffic on flat roofs to a minimum
Where the evidence points to walls, copings or rooflights, we will note it, with a suggestion of what to check next.
Act on leaks quickly. Water under a membrane can spread.
Roof by roof
Inverted and paved roofs
A terrace or paved roof hides the waterproofing. Whether it can be tested depends on the build-up.
Liquid-applied waterproofing
Liquid-applied coatings form a seamless layer but holes and thin areas can occur. Whether ELD works depends on the coating and build-up.
Flat roofs in Thorley Street
In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile. Mixed in with those pitched roofs are plenty of flat ones, over rear extensions, dormers, garages and shops. Historic houses such as Much Hadham Palace, about 3.6 miles west, show how far back building in the area around Thorley Street goes. If your home is one of the older ones, expect a mix of original materials and later repairs on the roof.
Take an older house close to Parish Church of St James the Great: any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof. Take a building like Thorley Hill Primary School: ponding and blocked outlets on a wide flat roof are worth catching before the next wet season.
Thorley Street is about 1 mile south of Bishop's Stortford, in Hertfordshire. Houses, flats, blocks and commercial buildings in Thorley Street can all book electronic leak detection. We cover towns and villages across Hertfordshire, large and small. Our Chelmsford page covers surveys nearby.
Electronic leak detection in CM23 work the same way as everywhere else we cover. If you’re just outside Thorley Street, we cover Thorley (1 mile west), Spellbrook (1 mile south), Little Hallingbury (1 mile south-east), Bishop's Stortford (1 mile north) and Gaston Green (1 mile south-east). Within a short drive, we also cover Stevenage (15 miles west), Hoddesdon (10 miles south-west), Cheshunt (13 miles south-west), Hertford (11 miles west), Ware (8 miles west) and Broxbourne (10 miles south-west).
Around Thorley Street
Typical jobs here are in homes near Coach And Horses Public House and The Bishop's Stortford High School, among other places. The nearest railway station is Bishops Stortford station, about 1.2 miles north. Other landmarks nearby include Moated mound (3.4 miles north-west) and Herts and Essex Hospital (1.3 miles north-east). Open spaces near Thorley Street include Thorley Wash nature reserve and Portingbury Hills.
How the survey works
Every roof is different, but as a rough guide the survey takes longer on a large roof than a small one, with the construction of the roof playing a part too. You’re welcome to ask questions while we’re there. In a small place like Thorley Street, access is usually the main thing to plan. Let us know about outbuildings, past repairs and any leaks you’ve noticed. Visits can be on weekdays, Saturdays or Sundays.
- You tell us about the roof and where water is showing.
- The roof is assessed for suitability first.
- The test method is chosen to suit the roof.
- The membrane is tested and breaches are found.
- You get a report with photos of each breach.
How to prepare
- Find any records of previous roof work
- Clear the way to the loft hatch
- Agree roof access with the managing agent if it is shared
Booking a survey
Our phone lines are open seven days a week. To book or ask a question, ring 07833 053749 or drop us an email.
Related advice
Prices for electronic leak detection in Thorley Street
We confirm the exact price before you book. This is what makes a difference:
- How tall the building is and how easy the roof is to see
- House, block, shop or office
- The shape of the roof and its details
- If the survey needs thermal imaging or a drone
The cost of a survey depends on the roof: its size, its height, how many sections it has 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.
Getting in touch
If you can, have these to hand when you contact us:
- Your timetable, such as an exchange date
- The type of building and roof, such as pitched or flat
- What made you get in touch
- Pictures of the roof from a safe spot, if you have them
To book a survey, phone 07833 053749 or use the contact form with the address and what you’d like to know about the roof. We will confirm the price before booking.
Signs you need electronic leak detection in Thorley Street
Flat roof membranes can be punctured by foot traffic, dropped tools or debris. Some are too small to see but water still finds them.
These are some of the problems a survey can pick up:
- Patched roofs that still leak
- Water coming in under a flat roof
- Leaks showing away from the breach
- Leaks through a covered membrane
For landlords with property near Bishops Stortford station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Choosing a roof surveyor
- What’s outside the scope of the survey
- Their drone registration, if they fly one
- What the report includes, and whether it has photographs
- When you’ll get the report
Thorley Street: your questions answered
Do you cover Thorley Street?
Yes, Thorley Street is one of the places we work. Every survey there gets the same written report with photographs.
Is my home in Thorley Street listed or in a conservation area?
Start with Historic England’s list for listing and your council for conservation areas. Either can affect what roof work is allowed, so it is worth checking before planning any.
Is the repair part of the test?
No, our part is finding the breaches. The report gives your roofer the locations.
What do I do with the report?
You receive the written report by email, with photographs and recommendations. You can use it to talk to a seller, an insurer, a roofer or a managing agent, whichever applies.
Can you survey in bad weather?
It depends on the weather and the survey. In strong wind or heavy rain, a drone can’t fly and access may not be safe, so we’d move the date with you.
What does the report include?
It sets out what we found, why it matters and what we recommend, with photos throughout. Anything we couldn’t see safely is noted too.
How many surveys have you done?
We have more than 20 years’ experience and have completed over 5,000 surveys across London and South East England.