Hertfordshire · London and the South East
Electronic leak detection in How Wood, Hertfordshire
Not sure what state the flat roof membrane is in? You can book electronic leak detection in How Wood and across Hertfordshire.
- Waterproofing to test before it’s covered
- A flat roof leak that can’t be traced
- Leaks under green or ballasted roofs
Electronic leak detection in How Wood
ELD is a way of pinpointing breaches in a flat roof’s waterproofing membrane. It works with an electrical current that passes through the membrane only where there is a breach. That lets us locate holes that are too small to see so your roofer knows exactly where to repair. You get a report with photographs of each breach found. Typical surveys look at leaks under green or ballasted roofs and repairs that haven’t stopped the leak, on commercial flat roofs, flat roof membranes and single-ply roofs.
Flat roofs in smaller places like How Wood can be more exposed, particularly where nothing shelters them, so wind catches loose edges and trims. Felt and bitumen also age in strong sun. The signs are splits, blisters and edges coming away. Standing water that lingers for days after rain is another sign worth watching for.
Where we can’t see part of the flat roof membrane, the report says so. You will know exactly what was inspected and what wasn’t.
- Place
- How Wood (AL2)
- Wider area
- Hertfordshire
- Prices
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- Survey days
- Monday to Sunday, daytime
- Cover
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
Prices for electronic leak detection in How Wood
To price your survey, we check:
- Whether thermal imaging or a drone is needed
- The size of the roof
- Whether it is a home or a commercial building
- Building height and the viewpoints available
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.
What we need to know
A little information up front helps. It’s useful to include:
- Access details, like a loft hatch or a shared roof
- Any marks or damp showing indoors
- The type of building and roof, like pitched or flat
- The property’s address and postcode
If you have photos of the roof, send them over. Take them safely from ground level or a window; never climb up to get a better view. To send them or to book, ring 07833 053749 or use the contact form.
Questions from How Wood
Is How Wood within the area you cover?
We do. A small place gets exactly the same survey as a big one.
Do you carry out roof surveys in How Wood?
Yes, How Wood is within the area we cover. Our area covers London and the South East. You can call 07833 053749 or drop us an email with the address and a few details, and we will talk through which survey suits.
Do you survey roofs on blocks of flats?
Yes, once whoever controls the roof agrees access. We check the parts we’re given access to.
Will you go up on the roof?
Only when it’s safe. Safety comes first, and fragile or steep roofs can’t always be walked on. Safe viewpoints, the loft and a drone where applicable let us see the rest.
Is it a structural engineer’s report?
No. Our survey isn’t a structural engineer’s report, and it does not include calculations. We will recommend an engineer if we see signs that call for one.
Can you test a green or ballasted roof?
It can be possible, depending on the roof. Covered roofs limit the methods we can use, so we check the build-up first.
What’s the best way to book?
Simply ring 07833 053749 or drop us an email. After a few questions, we confirm the price and fix a day, weekday or weekend.
Useful tips for How Wood property owners
Some practical points come up on survey after survey. They apply to most roofs:
- Ask contractors to protect the membrane
- Check new waterproofing before handover
- Keep a note of leaks after rain
- Act on new leaks promptly
Once repairs are made, the roof can be tested again if you want to check them, where the roof still suits the method.
ELD before paving, ballast or planting goes on is worth considering. It’s easier to find holes before more layers are added.
Nearby places to How Wood
Also in How Wood
DIY checks: what’s safe
Keep a simple record: dates of leaks, photos from ground level and any work done on the roof. Send it with your enquiry, as it helps us focus the survey.
Look up at the roof after a storm, from ground level: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Don’t go up yourself.
Signs you need electronic leak detection in How Wood
Holes in a membrane often come from feet, tools or debris. Many are tiny, but still let water through.
These are some of the problems a survey can pick up:
- Patched roofs that still leak
- Leaking laps in the waterproofing
- Holes around roof penetrations
- Leaks under green or ballasted roofs
Take an older house close to Church of the Holy Trinity: later flat-roofed additions are common on older houses, and their edges and upstands often show the first signs of wear.
What to check before booking
- What the survey won’t cover
- How they plan to inspect the roof safely
- When you will get the report
- Whether the inside of the roof is included
Flat roofs in How Wood
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. Flat roofs on extensions, dormers, garages and business units are found alongside them almost everywhere. High Elms Manor, about 2.2 miles south-west, is one of the historic houses in the wider area around How Wood. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs.
Landlords with a home close to How Wood station may find that a flat roof over a rented flat is easy to forget until the tenant reports a leak. Shop and office owners around Village Arcade St Albans may find that outlets and upstands on commercial flat roofs are the places to check before trouble starts.
How Wood is about 2 miles south-west of St Albans, in Hertfordshire. Surveys in How Wood work the same way as everywhere we cover: a proper look at what can safely be seen, photos and a clear written report. How Wood is one of the places in Hertfordshire we cover. London is in our area too.
Surveys in AL2 are booked the same way as anywhere else. Whether your property is on Ringway Road, Alder Close and How Wood or a nearby road, we can help. Other places close to How Wood include Park Street (1 mile north-east), Chiswell Green (1 mile north-west), Frogmore (1 mile east), Bricket Wood (1 mile south-west) and Colney Street (1 mile south-east). Larger places within reach include Watford (4 miles south-west), Hemel Hempstead (5 miles north-west), Stevenage (15 miles north-east), Welwyn Garden City (9 miles north-east), Harpenden (7 miles north) and Hoddesdon (15 miles east).
What’s near How Wood
Locally, jobs take us to homes and businesses close to Marlborough Science Academy and The Falcon pub, among other places. How Wood has its own railway station: How Wood station. Other landmarks nearby include Hilfield Castle (4.6 miles south) and Hypocaust Museum (2.1 miles north). Not far away are Broad Colney Lakes and Verulamium Lake.
How the survey works
The visit has one job: to see as much of the flat roof membrane as can be seen safely and record it clearly. Notes and photographs go into the written report. It usually takes longer on a large roof than a small one, and the build-up of the roof makes a difference too. A visit to How Wood is planned like any other: the time, the access and where to park are agreed ahead of time. Weekday and weekend visits are both possible. Let us know about any garages, outbuildings or extensions you want included.
- 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.
- We test the roof and locate any breaches.
- You get a report with photos of each breach.
Before the survey
- If you are buying, let the agent know when we are coming
- Tell us about parking before the day
- Have keys ready for side gates, garages or roof access doors
Arrange a survey
We confirm the exact price before booking, so you know where you stand. We quote electronic leak detection for each roof, as the method and time depend on the roof. For a price for your roof, call 07833 053749 or email us.
Related advice
What electronic leak detection doesn’t cover
Our findings are based on what we can see safely on the day, so some things are outside what a survey can do:
- Repairing the breaches (that is for your roofer)
- Build-ups without a suitable layer below
- Sections we can’t safely access
If in doubt, phone 07833 053749 or email us and we’ll recommend the right survey before booking. The full list of what we check.
Roofs we survey in How Wood
- Liquid-applied waterproofing
- Flat roof membranes
- Green roofs
- Single-ply roofs
- Commercial flat roofs
- Roof terraces and balconies