Hertfordshire · London and the South East
Coleman Green Electronic Leak Detection
Find out what’s going on with the flat roof membrane before you spend money on it. Electronic leak detection in Coleman Green, with photographs and a clear written report.
- Damp inside with no sign on the roof
- Breaches hidden under paving or planting
- Patched roofs that still leak
DIY checks: what’s safe
Fresh stains on ceilings or walls after rain are worth noting. Photograph them and note the date.
It helps to keep a record: dates of leaks, photos from ground level and any work done on the roof. Share it with us as you book, as it helps us focus the survey.
Electronic leak detection for homes and businesses in Coleman Green
Electronic testing locates holes in the waterproofing but not every way water gets in. Water coming through walls, copings, rooflights or plumbing won’t show on the test. We’ll tell you if we think the leak is coming from somewhere else. It will not show water getting in through brickwork or around frames. Our report keeps that distinction clear. You’ll also know what to check next. Common reasons to book are new membranes needing a check before handover and leaks that return after repairs, on flat roof membranes, green roofs and single-ply roofs.
In a small place like Coleman Green, a flat roof can stand in the open, so edges, upstands and laps take a beating. Older felt roofs, often around 15–20 years in life, show it first. EPDM rubber and GRP coverings last longer, but their edges and joints still need checking. On an exposed roof, the edges tend to go first.
You can share the report with anyone who needs it: a seller or estate agent, an insurer, a roofer, a builder or a managing agent, whichever applies.
- Place
- Coleman Green (AL4)
- Wider area
- Hertfordshire
- Cost
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Appointments
- Weekdays, Saturdays and Sundays
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
When to book a survey in Coleman Green
New membranes can have defects from installation. Testing before the roof is covered or handed over helps find them.
These are some of the problems a survey can pick up:
- Damage from equipment installers
- Leaks that return after repairs
- Leaks showing away from the breach
- A flat roof leak that can’t be traced
If you own a rental within reach of Welwyn Garden City station, a flat roof over a rented flat is easy to forget until the tenant reports a leak.
Choosing a roof surveyor
- Whether the price includes VAT
- Will they check the loft as well as the outside?
- Whether any drone flown is registered with the CAA
- Which limits apply to the survey
What affects the cost of electronic leak detection
A few things affect what a survey costs:
- Features like valleys, chimneys, dormers and parapets
- Extensions, dormers and garages with roofs of their own
- The use of thermal imaging or a drone
- Roof area
The cost of a survey depends on the roof: its size, its height, how many sections it has and how safely it can be seen. Electronic leak detection is quoted for your roof, because the method depends on the roof.
Helping us price your survey
Before you get in touch, it is useful to have:
- Dates you are working to, such as exchange
- The style of property, from a terrace to a block
- What’s prompted the survey
- Access details, such as a loft hatch or a shared roof
Our phone lines are open seven days a week, including Saturdays and Sundays. For a price or to book, ring 07833 053749 or send us an email.
Landlord and commercial surveys in Coleman Green
Surveys can also be booked by buyers’ agents acting for a client. The report is emailed, so it can go straight to your client.
Shared roofs need a little more planning: we need access agreed with the building owner or managing agent. Let us know about it when you book and we’ll plan the visit with that in mind.
Practical tips
A few practical points come up again and again on our surveys. They apply to most roofs:
- Get leaks traced quickly
- Ask contractors to protect the membrane
- Note where leaks show inside and when
- Let us know about the membrane and build-up if you know it
Keep the report with the roof’s records. It is a dated record of the membrane’s condition.
Clear flat roof outlets regularly. Water that sits on the roof finds breaches faster.
What happens on the day
Where it is relevant and can be reached safely, the roof space is checked as well as the outside. In the loft, the signs we look for are staining, damp, daylight and sagging, as far as the space allows. The whole visit usually takes a time that depends on the size of the roof and how it’s built, which we set out in the quote. Around Coleman Green, older homes can have small or awkward roof spaces, so let us know about the loft hatch and any ladder. We only go where it is safe.
- We start with what you know about the roof and the leak.
- 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.
Preparing for the visit
- Find any records of previous roof work
- If it is not your property yet, arrange access through the agent
- Unlock side gates and any roof access doors
Booking a survey
Surveys can be booked for weekdays, Saturdays or Sundays. To arrange a day that suits you, phone 07833 053749 or email us with the address and the days you’d prefer.
Advice
FAQs for Coleman Green
Is Coleman Green in the area you cover?
Yes. We survey roofs across London and the South East, and Coleman Green is part of that. Just phone 07833 053749 or send us an email and let us know about the property.
How do I find out if my home in Coleman Green is listed?
Start with Historic England’s list for listing and your council for conservation areas. It’s worth checking before planning roof work, as both can affect what’s allowed.
How does ELD work?
ELD passes a small electrical current across the roof to locate holes in the membrane. A breach lets the current through so we can pinpoint it.
Will you fly a drone over my roof?
Where it helps and it is safe, yes. Flights depend on the weather on the day and airspace rules, including flight restriction zones near airports. We hold a CAA Flyer ID and Operator ID.
Do you carry out surveys on Saturdays and Sundays?
Visits run seven days a week in the daytime. Let us know your preferred days when you book.
How much time does ELD need?
The roof’s size and build-up decide how long it takes. You’ll know roughly how long before we start.
Is the repair part of the test?
No. We test the membrane and report. The report shows where each breach is so your roofer can fix them.
Flat and commercial roofs around Coleman Green
Slate and clay tile are the usual coverings on older South East houses, with concrete tiles on many later estates, and flat-roofed additions turn up almost everywhere. Alongside them, flat-roofed extensions, dormers, garages and commercial units are common almost everywhere. The wider area around Coleman Green has a long history of building, with Shaw's Corner about 2.5 miles north. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs.
For site and facilities teams at buildings such as Beech Hyde Primary School and Nursery, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly. If you run a business near Howard Centre, outlets and upstands on commercial flat roofs are the places to check before trouble starts.
Coleman Green is about 3 miles north-west of Hatfield, in Hertfordshire. We provide electronic leak detection for homes and businesses in Coleman Green and nearby. Across Hertfordshire, we cover Coleman Green and the places around it. There is also a page for London.
Electronic leak detection in AL4 work the same way as everywhere else we cover. We cover properties on Coleman Green Lane and Darblay Close and the roads around them. If you’re just outside Coleman Green, we cover Cooper's Green (2 miles south), Lemsford (2 miles east), Jersey Farm (2 miles south-west), Stanborough (2 miles east) and Smallford (3 miles south). We also work in nearby towns like Watford (11 miles south-west), Hemel Hempstead (8 miles west), Stevenage (9 miles north-east), St Albans (4 miles south-west), Welwyn Garden City (4 miles east) and Harpenden (3 miles north-west).
Landmarks near Coleman Green
Around Coleman Green, our work takes us to homes and buildings near Sandringham School and John Bunyan pub. Coleman Green’s nearest station is Welwyn Garden City station, about 3.1 miles east of the centre. Other landmarks nearby include Howard Centre (3.1 miles east) and The Bunker at Hatfield Police Station (2.8 miles south-east). The countryside around Coleman Green includes Wheathampstead Local Nature Reserve and Verulamium Lake.