Essex · London and the South East
Mark Hall South Electronic Leak Detection
Electronic leak detection for homes and businesses in Mark Hall South. More than 5,000 surveys completed across London and South East England.
- Leaks under green or ballasted roofs
- Leaks showing away from the breach
- Gaps at membrane joints
Electronic leak detection in Mark Hall South: local notes
Harlow, which Mark Hall South is part of, is one of England’s post-war new towns. Homes from the post-war decades are common in the new towns, many with low-pitched roofs in concrete tiles and flat-roofed garages or porches. Many of those flat roofs have been re-covered over the years, and some may still have older felt. Cement sheet roofs on buildings from before 2000 may contain asbestos, so a specialist asbestos surveyor should check them before they’re disturbed. Listing and conservation areas can both shape what roof work is allowed on an older home. Your council and Historic England’s list will tell you where you stand, ideally before any re-roofing is planned.
Anyone responsible for a site like Cooks Spinney Primary Academy and Nursery will know that large flat roofs, common on schools and other public buildings, need their outlets, upstands and coverings checked regularly. If you own one of the older houses in the streets near St Andrew's Methodist Church, the flat roofs on later extensions tend to wear out long before the main roof.
Mark Hall South is about 1 mile north-east of Harlow, in Essex. In Mark Hall South, as across Essex, every roof gets the same careful survey. Our Essex coverage includes Mark Hall South and the places around it. For surveys nearby, see our Chelmsford page.
Here we cover the CM20, CM17 and CM18 postcode area for electronic leak detection. That includes homes and businesses on First Avenue, Mardyke Road and Momples Road and the roads around them. You’ll find Mark Hall South on the A414 and A1025, so it’s easy for us to get to. Other places close to Mark Hall South include Harlow (1 mile south-west), Mark Hall North (1 mile north-west), Latton (1 mile south-east), Netteswell (1 mile west) and Newhall (1 mile east). Larger places within reach include Brentwood (13 miles south-east), Loughton (9 miles south), Waltham Abbey (8 miles south-west), Great Dunmow (12 miles north-east), Epping (5 miles south) and Stansted Mountfitchet (10 miles north).
Around Mark Hall South
Around Mark Hall South, our work takes us to homes and buildings near Fawbert and Barnard's School, Harlow Marsh and Purple Emperor pub and the streets around them. Mark Hall South’s nearest station is Harlow Town station, about 1.2 miles north-west. A little further out are Harlow Mill (1.2 miles north) and Princess Alexandra Hospital (1.4 miles west). The countryside around Mark Hall South includes Hunsdon Mead.
Electronic leak detection in Mark Hall South
Roofs covered with paving, ballast or planting need more thought. The layers on top can limit the methods we can use and parts may need to be lifted. We will discuss it with you when we quote. Any details of the build-up help because they show what’s under the surface. We will tell you if the roof cannot be tested. Typical surveys look at damage from equipment installers and leaking laps in the waterproofing, on single-ply roofs, liquid-applied waterproofing and commercial flat roofs.
In smaller places like Mark Hall South, flat roofs are mostly on extensions, garages, porches and dormers. Even a small flat roof can let lots of water into the room below. What it’s covered in, and how well it was laid, decides what it needs. Ponding, splits and lifting edges are the signs to look for from a window.
After the visit, you get a written report with photos, emailed to you. It sets out the condition of the flat roof membrane, any defects and our written recommendations.
- Place
- Mark Hall South (CM20, CM17, CM18)
- Wider area
- Essex
- Cost
- Quoted for your roof
- Your report
- Emailed report with photos and recommendations
- When we survey
- Weekdays, Saturdays and Sundays
- Insured
- Professional indemnity and public liability
- Phone
- 07833 053749
- Updated
- 27 October 2026
How it works
You don’t need to do much on the day. Show us any stains, drips or problem areas you know about, and we’ll get on with the inspection. The survey itself takes more time on a big roof than a small one, with the construction of the roof playing a part too. Parking around Mark Hall South is normally easier than in a town centre, but mention lanes, gates or long drives. On bungalows and lower roofs, much can be seen from ground level, with the loft showing the underside, while taller roofs may need other vantage points or the drone where it applies.
- We ask about the roof, its age, its membrane and where leaks appear inside.
- We confirm whether the roof is suitable for electronic testing.
- The method depends on the membrane and what sits above and below it.
- 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.
Getting ready for the survey
- Make sure the loft hatch can be reached
- Buyers: confirm access with the estate agent or seller
- Make a note of anything you’d like us to look at
Booking a survey
If you are buying, it’s useful to book soon after your offer is accepted, so there’s time to use the report before exchange. For any other survey, just phone 07833 053749 or drop us an email when you are ready.
Advice
Rented homes, blocks and businesses
Letting agents can arrange access with tenants. Surveys run seven days a week, which helps when tenants work during the week.
Letting agents often book on a landlord’s behalf, with the report sent to whoever needs it. We agree a time with the tenant beforehand.
Practical tips
A survey works best with a little help from you, before and after. Some tips:
- Clear flat roof outlets regularly
- Keep a note of leaks after rain
- Act on new leaks promptly
- Limit access to 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.
Act on leaks quickly. The longer water gets in, the more insulation and decking can be affected.
Do you need electronic leak detection in Mark Hall South?
Seams are a common weak point in flat roof waterproofing. A gap that’s hard to see can let water in long before anyone notices.
Problems we come across often include:
- Failed seams and laps
- Stains far from any visible defect
- New roofs to check before paving or planting
- Breaches around outlets and penetrations
If you own a rental within reach of Harlow Town station, flat roofs on let property tend to be checked only when they fail, which is the costly way round.
Questions to ask before you book
- Are they insured for the work?
- Will the report include photos?
- Whether the inside of the roof is included
- Whether the price includes VAT
Why act early in Mark Hall South
ELD before paving, ballast or planting goes on is simpler. Covered roofs are harder to test. Around Mark Hall South, a leak in an older house can soak into timbers and plaster, and that’s a much bigger job than the original defect.
For a price for your roof in Mark Hall South, ring 07833 053749 or use the contact form with the address and a few details. The price is agreed before a date is set.
Why book with us
- An independent look at the roof
- CAA-registered drone operator (Flyer ID and Operator ID)
- Every finding written up with photos
- 98% customer satisfaction
Towns and villages near Mark Hall South
Also in Mark Hall South
Common questions in Mark Hall South
Do you cover smaller places like Mark Hall South?
Yes. Mark Hall South is within the area we cover, which takes in towns, villages and rural addresses. Our area covers London and South East England. Just mention lanes, gates or anything else about the route when booking.
Does a conservation area affect roof work in Mark Hall South?
For listing, use Historic England’s list; for conservation areas, ask the council. The answer matters most when a change of material is on the cards.
Will you go up on the roof?
Only when it’s safe. Most of what we need can be seen from safe viewpoints, the loft and, where applicable, a drone, and anything out of sight is recorded in the report.
What does electronic leak detection do?
The waterproofing membrane normally stops an electrical current, but a hole lets it through. That lets us find breaches that are too small to see.
Can you inspect my roof with a drone?
Yes, where it’s applicable. Our sub-250g drone is flown by a CAA-registered operator with a Flyer ID and Operator ID, and the airspace and weather are checked before every flight.
Do you survey roofs on blocks of flats?
Yes, as long as access is agreed. Roofs over flats are frequently shared, so we need permission from whoever owns or manages the building. We can only inspect what we are given access to.
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, such as cement sheets or soffits on pre-2000 buildings and suggest a specialist asbestos surveyor checks them before any work.
Roof by roof
Inverted and paved roofs
Inverted roofs have the insulation on top of the waterproofing, which affects testing.
EPDM rubber roofs
Some EPDM membranes conduct electricity, which can rule out some methods. We will say if the test won’t work.