Hertfordshire · London and the South East
Electronic Leak Detection in Cold Christmas
Need electronic leak detection in Cold Christmas? We can help, with a written report you can act on. Book a weekday or weekend visit.
- Leaking laps in the waterproofing
- Leaks showing away from the breach
- Holes around roof penetrations
How electronic leak detection works in Cold Christmas
We carry out electronic leak detection on flat roofs in Cold Christmas and across London and the South East. A visit typically takes more time on a big roof than a small one, with the construction of the roof playing a part too. We quote electronic leak detection for each roof, as the method and time depend on the roof. You get a report with photographs. We survey roof terraces and balconies, liquid-applied waterproofing and green roofs, and people most often book us about gaps at membrane joints and repairs that haven’t stopped the leak.
In a small place like Cold Christmas, a flat roof can stand in the open, so edges, upstands and laps take a beating. Felt roofs, which frequently last around 15–20 years, typically show it first. EPDM rubber and GRP coverings last longer, but their edges and joints still need checking. On an exposed roof, the edges tend to go first.
Findings are set out part by part, from the coverings down to the gutters, with a note and a photo for each point. You will see the good as well as the bad.
- Location
- Cold Christmas (SG12)
- Region
- Hertfordshire
- Prices
- Quoted for your roof
- Reports
- A written report with photos, by email
- Appointments
- Monday to Sunday, daytime
- Cover
- PI and public liability insurance
- Call
- 07833 053749
- Last updated
- 27 October 2026
The survey, step by step
We work from the outside in: first the slopes, edges and gutters from every safe viewpoint, then the roof space where it can be reached. In total, it takes longer on a large roof than a small one, and the build-up of the roof makes a difference too. For a village or hamlet like Cold Christmas, the journey is planned ahead of time: let us know about lanes, gates and parking. On the day, we inspect everything that’s safely in view, inside and out.
- 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.
- The roof is tested and any breaches are located.
- You get a report showing where each breach is, for your roofer to repair.
How to prepare
- Show us where any leaks or stains appear
- Make a note of anything you’d like us to look at
- Let us know where we can park nearby
Arrange a survey
We survey roofs on weekdays and at weekends. To arrange a day that suits you, phone 07833 053749 or use the contact form with the address and the days you’d prefer.
Read more
Cold Christmas: your questions answered
Do you cover Cold Christmas?
Yes, Cold Christmas is within the area we cover. We survey roofs across London and South East England. Just phone 07833 053749 or drop us an email and let us know about the property, and we will talk through which survey suits.
Will you come out to Cold Christmas?
Yes, smaller places are covered as well as towns. Our area covers London and South East England. Just mention lanes, gates or anything else about the route when booking.
How does ELD work?
A sound membrane blocks the test current, but a hole lets it through. That’s how we locate breaches you cannot see.
How much time does ELD need?
It depends on the size of the roof and its build-up. We’ll give you an idea when we quote.
Will you repair the leak?
No. We test the membrane and report. The report shows where each breach is for your roofer to repair.
Will you fly a drone over my roof?
Where it helps and it is safe, yes. Whether we can fly on the day depends on the weather and the airspace rules. We hold a CAA Flyer ID and Operator ID.
Which method do you use?
The method is chosen to suit the roof. Low-voltage methods are usually carried out on a wet roof and high-voltage methods need the membrane dry and exposed.
Nearby places to Cold Christmas
More services for Cold Christmas
Why it is worth a survey now in Cold Christmas
Cutting open a flat roof to find a leak can cause more damage. Electronic testing finds the hole first, so the repair can be targeted. Around Cold Christmas, older homes often have old roof timbers, where water from a failed roof can cause rot if it’s left.
The cost of a survey depends on the roof: its size, its height, how many sections it has and how safely it can be seen. We quote electronic leak detection for each roof, as the method and time depend on the roof.
What you get with us
- 5,000+ surveys completed
- Weekday and weekend surveys
- Covered by professional indemnity and public liability insurance
- Every finding written up with photos
See how roof surveys are priced and what we found on two real jobs.
What you can safely check yourself
It helps to keep a record: dates of leaks, photos from ground level and any work done on the roof. Share it with us when booking.
During heavy rain, look at the gutters from ground level or a window. Water spilling over the edge can point to a blockage or a sagging run.
What electronic leak detection doesn’t cover
Some things can’t be seen without opening up the roof, and that sets some limits:
- Leaks from walls, copings or rooflights
- Areas we can’t reach or that can’t be tested
- The extent of water in the insulation
If you are not sure which survey you need, phone 07833 053749 or email us and we’ll give you a straight answer before you book. What a survey covers and doesn’t.
Roof types and parts we check
- Liquid-applied waterproofing
- Single-ply roofs
- Commercial flat roofs
- Flat roof membranes
- Roof terraces and balconies
- Green roofs
Surveys for landlords and agents in Cold Christmas
Any of our surveys can be booked by landlords, agents and building managers in Cold Christmas. To discuss a property or a block, phone 07833 053749 or drop us an email.
A roof problem in a let property affects your tenants as well as the building. A survey shows what needs attention, so you can plan the work with less disruption.
Flat and commercial roofs around Cold Christmas
Much Hadham Palace, about 3.9 miles north-east, is one of the historic houses in the wider area around Cold Christmas. Older roofs in the wider area can hide decades of patch repairs, so the detail matters. Slate and clay tile are the usual coverings on older South East houses, with concrete tiles on many later estates. Mixed in with those pitched roofs are lots of flat ones, over rear extensions, dormers, garages and shops.
Take a building like Thundridge Church of England Primary School: a large flat roof with lots of outlets and rooflights has many places where a membrane can fail. If you let a flat or house near Ware station, flat roofs on let property tend to be checked only when they fail, which is the costly way round. If you own one of the older houses in the streets near Parish Church of St Mary, the joins between later flat roofs and the old walls are where problems normally start.
Cold Christmas is about 2 miles north-east of Ware, in Hertfordshire. We cover Cold Christmas and the rest of Hertfordshire, as part of our work across London and the South East. Cold Christmas is one of the places in Hertfordshire we cover for electronic leak detection. Chelmsford is in our area too.
We survey roofs across SG12 for electronic leak detection. Other places close to Cold Christmas include Wadesmill (1 mile north-west), Thundridge (1 mile west), High Cross (1 mile north-west), Babbs Green (1 mile south-east) and Wareside (2 miles south-east). Larger places within reach include Stevenage (9 miles north-west), St Albans (15 miles south-west), Bishop's Stortford (7 miles east), Welwyn Garden City (8 miles west), Harpenden (15 miles west) and Hitchin (14 miles north-west).
What’s near Cold Christmas
Around Cold Christmas, our work takes us to homes and buildings near The Windmill Public House and The Chauncy School. The closest station to Cold Christmas is Ware station, about 2.1 miles south-west. Other landmarks nearby include Museum of Street Lighting (2.5 miles south) and Hertford County Hospital (4.4 miles south-west). Open spaces near Cold Christmas include King's Meads.
How the survey changes by roof type
Inverted and paved roofs
If the build-up rules out ELD, we’ll say so.
Bituminous membranes
Bituminous felt and modified bitumen membranes are common. The build-up decides which method will work.