Hertfordshire · London and the South East
Electronic Leak Detection in Great Amwell
Electronic leak detection in Great Amwell from an independent, experienced roof surveyor. Over 5,000 surveys and 20+ years behind us.
- Holes around roof penetrations
- Patched roofs that still leak
- Gaps at membrane joints
Flat roofs in Great Amwell
In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere. Older buildings may be listed or sit in a conservation area. Historic England’s list shows listed buildings, and the council can say whether a street is in a conservation area. Re-roofing in different materials may need permission there.
If you own a rental within reach of St Margarets (Herts) station, flat roofs on let property tend to be checked only when they fail, which is the costly way round. Take an older house close to Parish Church of St John the Baptist: later flat-roofed additions are common on older houses, and their edges and upstands often show the first signs of wear.
Great Amwell is about 1 mile south-east of Ware, in Hertfordshire. Whether the building in Great Amwell is a house, a flat or a commercial unit, we can survey the roof. We cover towns and villages across Hertfordshire, from the larger towns to small villages. London is in our area too.
All of SG12 is covered for electronic leak detection, from the main roads to the quietest streets. That includes homes and businesses on Church Path, Amwell Hill and Madgeways Lane and the roads around them. We also cover the places around Great Amwell: St Margarets (1 mile south-east), Hailey (1 mile south), Little Amwell (1 mile south-west), Rush Green (1 mile west) and Stanstead Abbotts (1 mile south-east). Larger places within reach include Stevenage (11 miles north-west), St Albans (14 miles west), Bishop's Stortford (9 miles north-east), Welwyn Garden City (8 miles west), Harpenden (14 miles west) and Hitchin (15 miles north-west).
Landmarks near Great Amwell
In Great Amwell, that means homes and buildings near Hertford Regional College and Jolly Fisherman Public House, among other places. For rail, the closest station is St Margarets (Herts) station, roughly 0.9 miles south-east. A little further out are Museum of Street Lighting (less than half a mile north) and Barrowfield (1.4 miles west). Green spaces nearby include Amwell Quarry.
How electronic leak detection works in Great Amwell
Electronic leak detection works on many flat roof membranes over offices, units, blocks of flats and homes. It helps trace a leak you already have or to test a new membrane before it is covered. We quote for each roof based on its size and build-up. We can test on weekdays and at weekends when conditions allow. Tell us about your roof to find out more. Common reasons to book are patched roofs that still leak and leaks through a covered membrane, across green roofs, roof terraces and balconies and liquid-applied waterproofing.
Some older homes in villages like Great Amwell 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. 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 keep jargon out of it: where something needs attention, it says so plainly, along with how urgent it is.
- Location
- Great Amwell (SG12)
- Region
- Hertfordshire
- Price
- Quoted for your roof
- Reports
- Written, with photos, emailed to you
- Appointments
- Weekdays and weekends
- Cover
- PI and public liability insurance
- Phone
- 07833 053749
- Updated
- 27 October 2026
Surveys for landlords and agents in Great Amwell
If the property is let, the agent or a tenant can let us in. Surveys run seven days a week, which helps when tenants work during the week.
An agent can book and manage the survey for a landlord, with the report sent to whoever needs it. We agree a time with the tenant beforehand.
Great Amwell: your questions answered
Is Great Amwell within the area you cover?
Yes, Great Amwell is on our map. Villages and rural addresses get the same survey as a town house, with the route planned beforehand.
How do I find out if my home in Great Amwell is listed?
Historic England’s list shows listed buildings, and the local council can tell you about conservation areas. If a home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission.
Is this an asbestos survey?
No. We can flag materials that might contain asbestos, but only a specialist asbestos surveyor can confirm it. It may be present in buildings built or refurbished before 2000.
Does the weather affect the survey?
Light rain does not typically stop a survey. High wind or heavy rain can stop drone flights and make roof access unsafe, so we will agree a new date if the weather is not suitable.
How experienced are you?
Over 5,000 surveys so far, across 20+ years of surveying roofs, and 98% of customers are satisfied.
Can every flat roof be tested?
Not every roof is suitable. Some membranes conduct electricity, and some build-ups lack a suitable layer below. We’ll tell you if yours is not suitable at the start.
Does ELD work under paving or planting?
In some cases. It depends on the build-up and the layers above the membrane, and some may need lifting. We talk this through first.
Nearby places to Great Amwell
Also in Great Amwell
What we do, step by step
Photos are taken throughout the visit, so the report shows exactly what we saw. We take close-ups from wherever is safe, including by drone where it is applicable and the weather allows. Most surveys take more time on a big roof than a small one, and the build-up of the roof makes a difference too. Somewhere like Great Amwell needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. The roof is looked at from the ground, from windows, from the loft where there is safe access and from the roof where it is safe.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We confirm whether the roof is suitable for electronic testing.
- The testing method is chosen to suit the membrane and build-up.
- Testing runs across the roof to locate breaches in the membrane.
- The breaches are recorded with photos in a report for your roofer.
Preparing for the visit
- Have any paperwork from past roof work to hand
- Tell us about parking before the day
- Unlock side gates and any roof access doors
Book a survey
For a price for electronic leak detection in Great Amwell, call 07833 053749 or send us an email. A few details about the property and the roof help us price the survey accurately.
Related advice
What you can safely check yourself
Fresh stains on ceilings or walls after rain are worth noting. Photograph them and note the date, as it helps a surveyor trace the cause.
Your own check is a good start, but it is not a survey. From the ground, valleys, flashings and the backs of chimneys are frequently out of sight.
What we’re asked to look at in Great Amwell
Flat roof membranes can be punctured by foot traffic, dropped tools or debris. Many are tiny but water still finds them.
Look out for signs like these:
- Breaches around outlets and penetrations
- Gaps at membrane joints
- Leaks that return after repairs
- New membranes needing a check before handover
Anyone responsible for a site like Presdales School will know that large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
What to check before booking
- What they will not be able to tell you
- Whether the loft is part of the inspection
- Is VAT included in the price?
- What follow-up you get after the report
Roof by roof
Single-ply membranes
ELD often works on single-ply membranes, depending on the type and build-up.
EPDM rubber roofs
ELD on EPDM depends on the product and the layers. We check before we quote.
Tips that help
Some practical points come up on survey after survey. They’re worth knowing whatever the roof:
- Find the breach before more patching
- Tell us about the membrane and build-up if you know it
- Don’t let outlets block
- Get leaks traced quickly
If water has been getting in, insulation under the membrane may be wet. That’s something to discuss with your roofer, and moisture readings can help.
Act on leaks quickly. Water under a membrane can spread.