Hertfordshire · London and the South East
Leavesden Electronic Leak Detection
Need electronic leak detection in Leavesden? We can help, with a written report you can act on. Book a weekday or weekend visit.
- Gaps at membrane joints
- Breaches around outlets and penetrations
- Patched roofs that still leak
How electronic leak detection works in Leavesden
There are different ELD methods. Low-voltage testing is usually done with the surface wet, while high-voltage testing needs a dry, exposed membrane. Which one suits depends on the membrane and the layers of the roof and we explain which we’ll use. If neither method suits your roof, we will tell you before any testing starts. Common reasons to book are leaks through a covered membrane and waterproofing to test before it’s covered, across roof terraces and balconies, commercial flat roofs and green roofs.
Around a smaller place like Leavesden, flat roofs normally cover extensions, garages and dormers. Even a small flat roof can let plenty of water into the room below. What it’s covered in, and how well it was laid, decides what it needs, from felt and asphalt to EPDM rubber and GRP. Ponding, splits and lifting edges are the signs to look for from a window.
Nothing in the report is left vague: where something needs attention, it says so plainly.
- Location
- Leavesden (WD25, WD5)
- Wider area
- Hertfordshire
- Cost
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Phone
- 07833 053749
- Page updated
- 27 October 2026
Why it is worth a survey now in Leavesden
Some breaches are too small to see. Electronic testing can find breaches you can’t see by eye, on suitable membranes. Blocked gutters on homes around Leavesden overflow and soak walls. Dealing with the cause is simple; drying out a wall is not.
Bigger, taller and commercial roofs take more time to survey, so they’re priced to match. You’ll know the figure before booking.
Why us?
- Drone and thermal imaging surveys available
- An independent view of the roof
- We hold a CAA Flyer ID and Operator ID
- More than 5,000 surveys completed
Take a look at our cost guide and our case studies.
What electronic leak detection looks like in Leavesden
Historic houses such as High Elms Manor, about 0.4 miles north-east, show how far back building in the area around Leavesden goes. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material. 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. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere.
If you look after a building such as Alban Wood Primary School and Nursery, ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. If you live in an older home near Church of All Saints, the flat roofs on later extensions tend to wear out long before the main roof.
Leavesden is about 2 miles north of Watford, in Hertfordshire. Whether the building in Leavesden is a house, a flat or a commercial unit, we can survey the roof on a weekday or at the weekend. Leavesden is one of the places in Hertfordshire we cover. There is also a page for London.
We work across WD25 and WD5 for electronic leak detection. Whether your property is on Forest Road, Langley Lane and Sheepcot Lane or anywhere close by, we can survey it. You will find Leavesden on the A405, which makes it straightforward to reach. Close by, we survey roofs in Garston (1 mile south-east), Meriden (1 mile south-east), North Watford (2 miles south), Watford (2 miles south) and Aldenham (2 miles south-east). Further out, we also cover Hemel Hempstead (5 miles north-west), St Albans (5 miles north-east), Welwyn Garden City (11 miles north-east), Harpenden (9 miles north), Cheshunt (15 miles east) and Hatfield (8 miles north-east).
Near you in Leavesden
We work in homes and buildings around Woodside Playing Fields and Francis Combe Academy. For rail, the closest station is Garston station, roughly 1 mile south-east. Well-known places in the area include Hertfordshire Fire Brigade Museum (3.1 miles south) and Hilfield Castle (4.1 miles south-east). Not far away are Longspring Wood and Verulamium Lake.
Tips that help
A survey works best with a little help from you, before and after. Tips:
- Test new membranes before covering them
- Get leaks traced quickly
- Note where leaks show inside and when
- Keep foot traffic on flat roofs to a minimum
Keep the report with the roof’s records. It shows the condition of the membrane on that date.
Make sure contractors protect the waterproofing when they work up there. Check the roof after they’ve finished.
More services for Leavesden
The survey, step by step
We photograph the roof as we go, so you can see in the report what we found and where. We take close-ups from wherever is safe, including by drone where it’s 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. Parking around Leavesden is typically easier than in a town centre, but mention lanes, gates or long drives. Low roofs on bungalows can often be seen well from ground level, and the loft shows the rest, while taller roofs may need other vantage points or the drone where it applies.
- We start by finding out what the roof is made of and where it leaks.
- We check that the membrane and build-up suit electronic leak detection.
- We pick the low-voltage or high-voltage method that suits the roof.
- We test the membrane and find where current is passing through it.
- You get a report showing where each breach is, for your roofer to repair.
Before we arrive
- Keep pets out of the way during the survey
- Buyers: confirm access with the estate agent or seller
- Have any questions written down, so nothing gets missed
Arrange a survey
We confirm the price for your survey before you book, so you know the cost up front. Electronic leak detection is quoted for your roof, because the method depends on the roof. To book, ring 07833 053749 or drop us an email.
Advice
Questions from Leavesden
Is Leavesden within the area you cover?
Yes, smaller places are covered as well as towns. We survey roofs across London and South East England. Just mention lanes, gates or anything else about the route when you book.
Does a conservation area affect roof work in Leavesden?
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.
Does this replace a RICS home survey?
No. We look at the roof, not the whole building, and it isn’t a RICS Level 2 or Level 3 survey. Many buyers have both.
How do you choose the testing method?
The method is chosen to suit the roof. Low-voltage testing usually needs a wet surface, while high-voltage testing needs a dry, exposed membrane.
Does ELD include fixing the breach?
No. We test the membrane and report. You get the breach locations with photos for your roofer to repair.
What’s the best way to book?
The quickest way is to ring 07833 053749 or use the contact form. Give us the address and some details about the roof, and we will take it from there. We survey seven days a week.
What will the report tell me?
It explains what we saw, what it means and what we’d suggest, backed by photographs. Anything we couldn’t see safely is noted too, so you know exactly what was covered.
When to book a survey in Leavesden
Seams are a common weak point in flat roof waterproofing. Small openings at laps can leak for months before it shows.
Here are some of the things we see often:
- Gaps at membrane joints
- Leaks through a covered membrane
- New roofs to check before paving or planting
- Leaks through a flat roof with no obvious cause
Landlords with a home close to Garston station may find that the flat roof over a let home is worth a look before it becomes a tenant complaint.
What to check before booking
- What the report includes, and whether it has photos
- Are they insured for the work?
- How long they’ve been surveying roofs
- What follow-up you get after the report
What you can safely check yourself
It is useful to keep a record: when leaks happen, ground-level photos and any past roof work. Share it with us when you book, as it helps us focus the survey.
You can learn a lot from ground level. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Never climb onto the roof to look.
How the survey changes by roof type
Single-ply membranes
Punctures from foot traffic and equipment are common on single-ply roofs. Testing helps find them.
EPDM rubber roofs
ELD on EPDM depends on the product and the layers. We check this first.