Hertfordshire · London and the South East
Electronic Leak Detection in Digswell
We take a careful look at the flat roof membrane at your property in Digswell, with photographs and a written report.
- Leaks through a flat roof with no obvious cause
- Holes left by work on the roof
- Leaks that return after repairs
Electronic leak detection in Digswell
Electronic leak detection, or ELD, finds holes in flat roof waterproofing membranes. It works with an electrical current which can only get through the membrane at a breach. That lets us locate holes that are too small to see, so your roofer can repair them. The results come in a report with photos. If you’re worried about leaks that return after repairs and leaks at pipes, outlets or fixings, we can find out what’s behind it, whatever the roof.
In smaller places like Digswell, flat roofs are mostly on extensions, garages, porches and dormers. They’re small, but a leak over a kitchen extension can do a lot of harm. Knowing the covering and how it was laid tells you what to expect from it. From an upstairs window, look for standing water, splits and edges coming away.
If any part of the flat roof membrane couldn’t be seen safely, we say so in the report. You’ll know exactly what was inspected and what wasn’t.
- Where
- Digswell (AL8, AL7, AL6)
- Region
- Hertfordshire
- Prices
- Quoted for your roof
- Your report
- Written, with photos, emailed to you
- Appointments
- Weekdays and weekends
- Cover
- Professional indemnity and public liability
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Surveys for landlords and agents in Digswell
Letting agents frequently book on a landlord’s behalf. We agree a time with the tenant beforehand.
Landlords, agents and building managers in Digswell and across Hertfordshire can book any of our surveys. For a price for a let property or a block, phone 07833 053749 or send us an email.
Prices for electronic leak detection in Digswell
Prices vary from roof to roof, and it comes down to:
- Any need for thermal images or a drone flight
- The size of the roof
- Extensions, dormers and garages with roofs of their own
- The type of building, from a house to a block or an office
Bigger, taller and commercial roofs take more time to survey, so the price reflects that. The price is confirmed before you book.
Booking your survey
If you can, have these to hand when you get in touch:
- When you need the report by
- Any stains, drips or damp patches you’ve seen indoors
- The address and postcode of the property
- How the loft is reached, if there is one
To arrange a survey, call 07833 053749 or drop us an email with the address and what you’d like to know about the roof. We’ll confirm the price before booking.
Do you need electronic leak detection in Digswell?
Joints and laps in a membrane can fail over time. Small openings at laps can leak for months before it shows.
Here are some of the things we see frequently:
- Holes around roof penetrations
- Damp inside with no sign on the roof
- Gaps at membrane joints
- Punctures from foot traffic or tools
With Digswell House about 0.3 miles west, the area around Digswell has a long history. Older houses nearby frequently have flat roofs added much later, built to very different standards from the main roof.
Before you book anyone
- Their insurance cover
- What experience they bring
- What exactly goes into their report
- When you will get the report
Roof by roof
Liquid-applied waterproofing
Liquid-applied coatings form a seamless layer, but can still have thin spots or holes. Whether ELD works depends on the coating and build-up.
Single-ply membranes
ELD often works on single-ply membranes but it depends on the product and layers.
Towns and villages near Digswell
More services for Digswell
Flat and commercial roofs around Digswell
Digswell is part of Welwyn Garden City, one of England’s garden cities. Its first houses are now over a hundred years old, with later estates and newer homes around them. On the oldest homes, nails, battens and underlay may have reached the end of their life even where the tiles look sound, and parts of a garden city may be in a conservation area, so check with the council before re-roofing. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile, with flat-roofed extensions, dormers and garages common everywhere. Mixed in with those pitched roofs are plenty of flat ones, over rear extensions, dormers, garages and shops.
If you live in an older home near Digswell Village Church, the joins between later flat roofs and the old walls are where problems normally start. Landlords with a home close to Welwyn North station may find that flat roofs over rear additions and dormers in rented property are worth checking between tenancies.
Digswell is about 1 mile north of Welwyn Garden City, in Hertfordshire. In Digswell, as across Hertfordshire, every roof gets the same careful survey. Digswell is one of the towns and villages in Hertfordshire where we work. For surveys nearby, see our London page.
Postcode districts we cover here for electronic leak detection: AL8, AL7 and AL6. Whether your property is on Adele Avenue, Station Road and Hertford Road or a nearby road, we can help. We also cover the places around Digswell: Haldens (1 mile south-east), Harmer Green (1 mile north-east), Burnham Green (2 miles north-east), Oaklands (2 miles north) and Tewin (2 miles east). Larger places within reach include Watford (14 miles south-west), Hemel Hempstead (12 miles west), Stevenage (6 miles north), St Albans (7 miles south-west), Harpenden (6 miles west) and Hitchin (10 miles north).
Around Digswell
In Digswell, that means homes and buildings near Hedgehog pub, Monk's Walk School and Danesbury Park, among other places. Digswell has its own railway station: Welwyn North station. Well-known places in the area include Howard Centre (1.3 miles south) and Datchworth Museum (2.6 miles north-east). The countryside around Digswell includes Tewin Orchard and Hopkyns Wood.
What we do, step by step
Every visit follows the same pattern: we hear what you’ve seen, inspect the roof from each safe vantage point, take photographs as we go and record our findings for the written report. Most visits take more time on a big roof than a small one, with the construction of the roof playing a part too. In a smaller place like Digswell, as anywhere, the forecast plays a part: the parts that need calm, dry weather are planned around it.
- We start by finding out what the roof is made of and where it leaks.
- The roof is assessed to see if electronic testing will work on it.
- We pick the low-voltage or high-voltage method that suits the roof.
- The roof is tested and any breaches are located.
- You get a report showing where each breach is, for your roofer to repair.
How to prepare
- Gather any invoices or paperwork from past roof work
- Unlock side gates and any roof access doors
- Note where any stains or damp appear
How to book
If you’re buying, it’s useful to book soon after your offer is accepted, so you have the findings in time to act on them before you exchange. For any other survey, just ring 07833 053749 or email us when you’re ready.
Read more
FAQs for Digswell
Is my home in Digswell listed or in a conservation area?
Check Historic England’s online list first, then ask the council about conservation areas and any Article 4 direction. The answer matters most when a change of material is on the cards.
Do you carry out roof surveys in Digswell?
Yes. We survey roofs across London and South East England, and Digswell is part of that. You can phone 07833 053749 or email us with the address and some details, and we’ll talk through which survey suits.
Will you photograph what you find?
Yes. The report includes photos of what we found, so you can see each point for yourself.
How do I arrange electronic leak detection in Digswell?
Just call 07833 053749 or send us an email with the address. After a few questions, we confirm the price and fix a day, weekday or weekend.
Are you insured?
Our cover is professional indemnity plus public liability, and details are available on request.
Can you tell me if my roof has asbestos?
No. We don’t carry out asbestos surveys or testing. We flag materials that could contain asbestos, like cement sheets or soffits on pre-2000 buildings.
What does electronic leak detection do?
ELD passes a small electrical current across the roof to locate holes in the membrane. The current only gets through where the membrane is breached, which shows us where the hole is.
Leave it or get it looked at?
Some flat roof leaks come from walls or details. ELD helps rule the membrane in or out so attention can go to the right place. With lower homes, common in places like Digswell, there’s little between a roof defect and the ceiling, so a small leak can mark a ceiling within a few storms. Finding the cause first saves a second job inside.
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. We confirm the exact price before booking.
Why book us in Digswell
- Surveys on any day of the week
- Drone flown under a CAA Flyer ID and Operator ID
- Drones and thermal imaging where it applies
- An independent look at the roof
See what a roof survey costs and two real surveys.