Hertfordshire · London and the South East
Newgate Street Electronic Leak Detection
Get a clear view of the flat roof membrane at a property in Newgate Street from an independent roof surveyor. Visits run on weekdays and weekends, in the daytime.
- Punctures from foot traffic or tools
- Water coming in under a flat roof
- Leaking laps in the waterproofing
About our electronic leak detection in Newgate Street
Not every flat roof suits electronic testing. Some membranes conduct electricity themselves and some roofs don’t have a suitable layer beneath the membrane. If your roof isn’t suitable, we’ll tell you before any testing. Any details you have about the membrane and build-up help us decide, including drawings, specifications or the roofer’s paperwork. It avoids arranging a test that cannot give results. Common reasons to book are leaks at pipes, outlets or fixings and breaches hidden under paving or planting, on flat roof membranes, liquid-applied waterproofing and single-ply roofs.
Some older homes in villages like Newgate Street are listed or in a conservation area, and that can affect how an extension roof or dormer is re-covered. Check with the council before planning any change of material. Knowing the roof’s condition is the starting point. Changes that affect a listed building’s special interest need listed building consent.
The report records the flat roof membrane as we found it on the day. That makes it useful now and a handy reference later, for instance when you want to check whether anything has changed.
- Place
- Newgate Street (SG13)
- Wider area
- Hertfordshire
- Prices
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Last updated
- 27 October 2026
Newgate Street questions
How do I find out if my home in Newgate Street is listed?
We cannot confirm that for you, but Historic England’s list and your council can. Both listing and conservation areas can limit changes of roofing material, and councils can also use Article 4 directions.
Is Newgate Street in the area you cover?
Yes, Newgate Street is within the area we cover. Our area covers London and the South East. You can ring 07833 053749 or email us with the address and a few details, and we will talk through which survey suits.
How long have you been surveying roofs?
More than 5,000 surveys over 20+ years.
Can you test a green or ballasted roof?
It can be possible, depending on the roof. What sits on the membrane affects the method so we check the roof first.
Can every flat roof be tested?
That depends on the roof’s membrane and layers. Let us know what you know about the roof and we’ll confirm suitability.
What is electronic leak detection?
The waterproofing membrane normally stops an electrical current, so wherever there is a hole, it passes through. That lets us find breaches that are too small to see.
How much time does ELD need?
It depends on the size of the roof and its build-up. You’ll know roughly how long before we start.
Practical tips
There is plenty you can do without going near the roof. What helps most:
- Stay off the flat roof unless needed
- Use boards when working on the roof
- Consider ELD before paving or planting goes on
- Act on new leaks promptly
Keep the report with the roof’s records. It’s a dated record of the membrane’s condition.
Keep outlets and gutters on flat roofs clear. Standing water puts more pressure on any weak point.
Other services in Newgate Street
Common roof problems in Newgate Street
On a flat roof, water spreads under the waterproofing. The stain inside can be far from the hole, so tracing it by eye is difficult.
It is worth booking a survey if you’ve seen:
- Failed seams and laps
- Leaks through a flat roof with no obvious cause
- Leaks under green or ballasted roofs
- Damp inside with no sign on the roof
If you live in an older home near Church of St Mary Ponsbourne, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof.
Questions to ask before booking
- Their drone registration, if they fly one
- Which limits apply to the survey
- Their track record with similar roofs
- What exactly goes into their report
How the survey works
Expect us to ask a few questions before we start, such as when any problem began and what work has been done before. Then the inspection itself takes as long as needed for the roof’s area and construction, which we’ll explain when we quote. Around Newgate Street, older homes can have small or awkward roof spaces, so it helps to know whether there is a loft hatch and how easy it is to reach. Only areas that can be reached safely are inspected.
- 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.
- You get a report with photos of each breach.
Before the survey
- Show us where any leaks or stains appear
- If it is not your property yet, arrange access through the agent
- Leave side gates unlocked
Booking a survey
Every survey is priced before it’s booked, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. For a price for your roof, call 07833 053749 or send us an email.
Read more
What electronic leak detection doesn’t cover
To be straight with you, there are limits to any roof survey:
- Leaks from plumbing or windows
- Sections we cannot safely access
- Carrying out the repair work
If in doubt, call 07833 053749 or use the contact form and we will recommend the right survey before booking. What our survey covers.
Roof types and parts we check
- Roof terraces and balconies
- Green roofs
- Single-ply roofs
- Flat roof membranes
- Commercial flat roofs
- Liquid-applied waterproofing
For landlords and managing agents
Buyers’ agents can book surveys on behalf of their clients. Reports are emailed, so they’re easy to pass on, photographs included.
Letting agents often book on a landlord’s behalf. We agree a time with the tenant beforehand.
Flat roofs in Newgate Street
Across the South East, older homes tend to have slate or clay tiles, and many later ones concrete tiles. Next to the main roofs there is normally a flat roof somewhere, whether on an extension, a garage or a commercial unit. The wider area around Newgate Street has a long history of building, with Wyllyotts Manor about 4 miles south-west. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and the council can say whether a home is in a conservation area.
If you let a flat or house near Cuffley station, flat roofs over rear additions and dormers in rented property are worth checking between tenancies. For site and facilities teams at buildings such as Ponsbourne St Mary's Church of England Primary School, schools and public buildings often have big flat roofs, and their outlets and upstands need regular checks.
Newgate Street is about 3 miles north-west of Cheshunt, in Hertfordshire. Newgate Street is part of the area we cover as part of our work across London and South East England. Newgate Street is one of the places in Hertfordshire we cover for electronic leak detection. Our London page covers surveys nearby.
We cover every part of SG13 for electronic leak detection and the streets around it. We cover properties on Newgate Street Village, Carbone Hill and The Ridings. Close by, we survey roofs in Cuffley (1 mile south), Little Berkhamsted (2 miles north), Northaw (2 miles south-west), Bayford (2 miles north) and Essendon (3 miles north-west). We also work in nearby towns such as Watford (13 miles west), Hemel Hempstead (15 miles west), Stevenage (13 miles north), St Albans (9 miles west), Bishop's Stortford (15 miles north-east) and Welwyn Garden City (6 miles north-west).
Local landmarks in Newgate Street
We work in homes and buildings around The Coach And Horses Public House and the streets around them. Newgate Street’s nearest station is Cuffley station, about 1.4 miles south of the centre. A little further out are Chase Farm Hospital (4.3 miles south) and Hertford Castle (4.9 miles north). Green spaces nearby include Fir and Pond Woods and Cheshunt Lake.
Roof by roof
Bituminous membranes
Bituminous felt and modified bitumen membranes are common. The build-up decides which method will work.
Single-ply membranes
Many offices and units have single-ply roofs. Laps and fixings are where holes often appear.