Hertfordshire · London and the South East
Electronic leak detection in Felden, Hertfordshire
Wondering about the flat roof membrane at a property in Felden? We carry out electronic leak detection in Felden and across Hertfordshire.
- Leaks under green or ballasted roofs
- Waterproofing to test before it is covered
- Gaps at membrane joints
What electronic leak detection looks like in Felden
Felden is part of Hemel Hempstead, one of the post-war new towns. Many homes in the new towns date from the post-war decades, with concrete interlocking tiles, low-pitched roofs and flat-roofed garages and porches. Flat-roofed garages, porches and extensions from that era may have been re-covered more than once, or not at all. High Elms Manor, about 3.4 miles south-east, is one of the historic houses in the wider area around Felden. Older homes in the wider area frequently have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and the council can say whether a home is in a conservation area.
If you let a flat or house near Apsley station, the flat roof over a let home is worth a look before it becomes a tenant complaint. The streets around a church such as Church of St Mary are often among the oldest in a place, and if your house is among the older ones nearby, any flat roof added at the back or on a dormer is likely to be far younger, and less durable, than the main roof. If you look after a building such as Nash Mills Church of England Primary School, large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly.
Felden is about 2 miles south of Hemel Hempstead, in Hertfordshire. We cover Felden and the rest of Hertfordshire. Across Hertfordshire, we cover Felden and the places around it. There is also a page for London.
We cover every part of HP3 and WD4 for electronic leak detection and the streets around it. You will find streets such as Pond Road, Rose Lane and Lower Road, and we cover them all. We also cover the places around Felden: Nash Mills (1 mile east), Rucklers Lane (1 mile south), Apsley (1 mile north-west), Bennetts End (1 mile north-east) and Kings Langley (1 mile south-east). Within a short drive, we also cover Watford (5 miles south-east), St Albans (6 miles east), Welwyn Garden City (12 miles east), Harpenden (8 miles north-east), Hatfield (10 miles east) and Borehamwood (9 miles south-east).
Landmarks near Felden
Typical jobs here are in homes near Kings Langley School and The Paper Mill pub and the streets around them. There’s a railway station in Felden itself: Apsley station. A little further out are Hemel Hempstead Hospital (1.5 miles north). For a walk, there’s Long Deans and Verulamium Lake.
About our electronic leak detection in Felden
There are different ELD methods. Low-voltage testing is usually done with the surface wet and high-voltage methods need the membrane dry and exposed. Which one suits depends on the membrane and the layers of the roof, and we’ll explain our choice. If neither method suits your roof, we’ll tell you at the outset. If you’ve noticed leaks at pipes, outlets or fixings and holes left by work on the roof, we can find out what’s behind it, on roof terraces and balconies, flat roof membranes and green roofs alike.
In smaller places like Felden, 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. What it is 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.
We write the report in plain English, so it makes sense without any roofing background. Each point is backed by a photograph where possible, with the urgent items made clear.
- Where
- Felden (HP3, WD4)
- Region
- Hertfordshire
- Prices
- Quoted for your roof
- Report
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Insured
- Professional indemnity and public liability
- Call
- 07833 053749
- Page updated
- 27 October 2026
DIY checks: what’s safe
You can learn a lot from ground level. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Never climb onto the roof to look.
After heavy rain, check ceilings and the tops of walls for new stains. Take a photo and write down when you saw it.
Honest limits
No survey can tell you everything, and it is better to know them up front. Keep these in mind:
- How wet the insulation is
- Parts of the roof covered by fixed equipment
- Carrying out the repair work
If you are not sure which survey you need, phone 07833 053749 or use the contact form and we’ll give you a straight answer. The full list of what we check.
Roof types and parts we check
- Commercial flat roofs
- Single-ply roofs
- Green roofs
- Flat roof membranes
- Roof terraces and balconies
- Liquid-applied waterproofing
How it works
You do not need to do much on the day. Point out anything you’ve noticed, such as stains, drips or loose pieces, and we will take it from there. A typical survey takes a length of time set by the membrane area and the build-up, which we set out in the quote. A visit to a smaller place like Felden is no different on the day: outside, inside and from any safe vantage point, in that order. Point out any stains, cracks or loose pieces you’ve spotted.
- First, you let us know about the roof build-up and where water is showing.
- 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 the survey
- Buyers: confirm access with the estate agent or seller
- Point out any leaks or damp patches
- Have keys ready for side gates, garages or roof access doors
Arrange a survey
To get a price for electronic leak detection in Felden, ring 07833 053749 or send us an email. The address, the type of property and what you need to know help us price the survey accurately.
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Why act early in Felden
Not every leak is in the membrane. Testing shows whether the membrane is breached so attention can go to the right place. Around Felden, leaves and moss in gutters lead to overflowing water and damp walls, particularly where trees overhang. Dealing with the cause is simple; drying out a wall is not.
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. We confirm the price for your survey before booking.
Why book us in Felden
- We hold a CAA Flyer ID and Operator ID
- An independent look at the roof
- More than 20 years surveying roofs
- Insured for professional indemnity and public liability
See what a roof survey costs and what we found on two real jobs.
Questions from Felden
Is Felden within the area you cover?
Yes, we do. We cover the whole of London and South East England, from towns to the smallest villages. Longer journeys are simply planned in advance.
Are flat-roofed garages and porches in Felden worth including?
Often, yes, so mention it when booking. Flat-roofed garages and porches are common in new towns like Hemel Hempstead, and older felt coverings may be near the end of their life.
What’s the best way to book?
The quickest way is to phone 07833 053749 or use the contact form. Tell us the address and a little about the roof, and we will suggest the right survey. We survey on any day of the week.
Can you test a green or ballasted roof?
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.
Do you survey on Saturdays and Sundays?
We carry out surveys on any day of the week. To find a day that suits you, ring 07833 053749 or drop us an email.
What will the report tell me?
It explains what we saw, what it means and what we’d suggest, with photographs throughout. It also says if any part of the roof couldn’t be seen safely, so you know exactly what was covered.
Will you go up on the roof?
Only if it is safe. We check everything that can safely be seen: from the ground, from windows and vantage points, from the loft space, from the roof itself where safe and by drone where applicable. Anything we cannot see is noted in the report.
More services for Felden
How we price electronic leak detection
Several things affect the price of a survey:
- Extensions, dormers and garages with roofs of their own
- Roof area
- How complicated the roof is, with its valleys, chimneys and parapets
- Whether thermal imaging or a drone is needed
Larger roofs, taller buildings and commercial roofs take longer, so the price reflects that. The price is confirmed before booking.
Booking your survey
We’ll normally ask about:
- Where any leaks, stains or damp patches show inside
- Any photos you have, taken from ground level or a window
- Whether there’s a loft hatch, a shared roof or tricky access
- Dates you are working to, such as exchange
We confirm the price for the job before you book, so you know the cost up front. We quote electronic leak detection for each roof, as the method and time depend on the roof. For a price for your roof, ring 07833 053749 or email us.
Surveys for landlords and agents in Felden
Managing agents and residents’ management companies use roof surveys to plan maintenance. Recommendations are set out in order of urgency where relevant, which helps when budgeting.
If you own several properties, surveys can be booked for more than one address. To arrange surveys for several addresses, phone 07833 053749 or use the contact form.