Hertfordshire · London and the South East
Electronic Leak Detection in Northaw
Electronic leak detection to pinpoint holes in flat roof membranes across Northaw, using drones and thermal imaging where applicable. Call or email for a price.
- Patched roofs that still leak
- Damp inside with no sign on the roof
- Breaches hidden under paving or planting
Electronic leak detection in Northaw: what you get
Electronic leak detection works on many flat roof membranes, on homes, blocks and commercial buildings. It helps trace a leak you already have or check a new membrane before handover. Each roof is quoted on its size and build-up. We can test on weekdays and at weekends when conditions allow. Just ask about your roof. If you are worried about holes left by work on the roof and leaks that return after repairs, a survey will tell you what’s going on, whatever the roof.
Somewhere as small as Northaw, flat roofs tend to be on extensions, garages and converted outbuildings. They need the same care as any town roof: outlets, upstands, edges and the covering itself. The journey and access are planned beforehand. If there are outbuildings or garages with flat roofs, mention them as you book.
We keep jargon out of it: if work is needed, the report says so clearly.
- Location
- Northaw (EN6)
- Region
- Hertfordshire
- Prices
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- When we survey
- Weekdays, Saturdays and Sundays
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
Roof by roof
Liquid-applied waterproofing
Liquid waterproofing has no laps, but can still have thin spots or holes. Suitability for ELD depends on the system.
EPDM rubber roofs
ELD on EPDM depends on the product and the layers. We check this first.
Why act early in Northaw
Not every leak is in the membrane. ELD helps rule the membrane in or out, so other causes can be checked. Outbuildings and barns around Northaw are easy to forget, but a failed roof there can spoil what’s stored inside. A quick look before winter can save a lot.
To find out what your survey will cost, call 07833 053749 or drop us an email and let us know about the roof. The price is agreed before a date is set.
Why book with us
- Plain-English reports with photos
- Surveys seven days a week
- More than 5,000 surveys completed
- More than 20 years surveying roofs
Take a look at how roof surveys are priced and what we found on two real jobs.
The survey, step by step
Time on site depends on the size and shape of the roof, but as a rough guide the survey takes longer on a large roof than a small one, and the build-up of the roof makes a difference too. If you have questions on the day, just ask. Older roofs in small places like Northaw can have low, tight loft spaces, so it is useful to know whether there is a loft hatch and how easy it is to reach. Only areas that can be reached safely are inspected.
- We agree the area to be tested.
- The surface is prepared for the chosen method.
- We work across the roof with the test equipment.
- We mark the breach locations in our records.
- You receive the results to pass to your roofer.
Before the survey
- Leave side gates unlocked
- Have any questions written down, so nothing gets missed
- Note where any stains or damp appear
Getting a price
To get a price for electronic leak detection in Northaw, phone 07833 053749 or use the contact form. A few details about the property and the roof help us give you an accurate price.
Read more
What we can’t see
No survey can tell you everything, and it’s better to know them up front. Bear these in mind:
- Sections we can’t safely access
- Roofs whose membrane or build-up is not suitable
- Repairing the breaches (that’s for your roofer)
If you are not sure which survey you need, call 07833 053749 or email us and we’ll give you a straight answer before booking. What our survey covers.
What we check
- Single-ply roofs
- Green roofs
- Roof terraces and balconies
- Commercial flat roofs
- Liquid-applied waterproofing
- Flat roof membranes
Your questions about electronic leak detection in Northaw
Do you carry out roof surveys in Northaw?
Yes, Northaw is one of the places we work. The survey and report are the same in Northaw as anywhere else.
How do I find out if my home in Northaw is listed?
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.
What’s in the survey report?
It works through the roof part by part, in writing and with photos. The most urgent items are made clear.
Will you photograph what you find?
Yes. We photograph the roof as we go, and the report uses them to show each finding.
I live in a flat. Can you survey the roof?
Yes, once whoever controls the roof agrees access. On a shared roof we can only inspect the parts we are allowed to reach.
Can you tell me if my roof has asbestos?
No. Our report may flag materials that could contain asbestos, but confirming it is a job for a specialist asbestos surveyor. It may be present in buildings built or refurbished before 2000.
Does this replace a RICS home survey?
No. Our survey looks at the roof, not the whole building. If you need a full building survey, you’ll need a RICS survey as well.
Flat roofs in Northaw
With Wyllyotts Manor about 2.1 miles west, Northaw sits in an area with a long building history. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and the council can say whether a home is in a conservation area. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile. Next to the main roofs there’s usually a flat roof somewhere, whether on an extension, a garage or a commercial unit.
Take a building like Northaw Church of England Primary School: a large flat roof with a good many outlets and rooflights has many places where a membrane can fail. For an older house near a landmark like Parish Church of St Thomas A Becket, the joins between later flat roofs and the old walls are where problems usually start. If you own a rental within reach of Cuffley station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Northaw is about 2 miles north-east of Potters Bar, in Hertfordshire. We visit Northaw as part of our work across Hertfordshire, for homes and businesses alike. Across Hertfordshire, we cover Northaw and the places around it. For surveys nearby, see our London page.
Here we cover the EN6 postcode area for electronic leak detection. Streets in the area include Vineyards Road, Church Lane and Northaw Road West. Other places close to Northaw include Cuffley (1 mile east), Brookmans Park (2 miles north-west), Newgate Street (2 miles north-east), Bell Bar (2 miles north-west) and Little Berkhamsted (3 miles north). Larger places within reach include Watford (11 miles west), Hemel Hempstead (14 miles west), Stevenage (14 miles north), St Albans (8 miles west), Welwyn Garden City (7 miles north) and Harpenden (12 miles north-west).
Landmarks near Northaw
We work in homes and buildings around Two Brewers Public House and Mount Grace School, among other places. Northaw’s nearest station is Cuffley station, about 1.6 miles east. Well-known places in the area include Potters Bar Museum (2.1 miles west) and Chase Farm Hospital (3.3 miles south-east). Green spaces nearby include Fir and Pond Woods.
What you can safely check yourself
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.
After strong wind, take a look from the pavement or garden: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Leave anything above ground level to a survey.
Towns and villages near Northaw
Other services in Northaw
Tips that help
Nothing here needs a ladder. Our suggestions:
- Clear flat roof outlets regularly
- Avoid repeated repairs without finding the cause
- Check new waterproofing before handover
- Share any drawings of the roof
Once repairs are made, the roof can be tested again if you want to check them, where the roof still suits the method.
Limit foot traffic on flat roofs. Feet and dropped tools are a common cause of holes.