Hertfordshire · London and the South East
Electronic leak detection in Broad Colney, Hertfordshire
Electronic leak detection to pinpoint holes in flat roof membranes for Broad Colney and the rest of Hertfordshire. Surveys run seven days a week.
- Leaking laps in the waterproofing
- Leaks that return after repairs
- Water coming in under a flat roof
Electronic leak detection in Broad Colney: what you get
Our ELD report shows where each breach was found with photos. Your roofer can then repair those points instead of hunting for the leak. We don’t estimate repair costs, so your roofer prices the work. A retest after repairs can check the work if the build-up allows. You get a written report with photographs. Common reasons to book are patched roofs that still leak and new roofs to check before paving or planting, across single-ply roofs, commercial flat roofs and green roofs.
In a small place like Broad Colney, 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. Rubber and GRP last longer, though trims and joints still need a look. On an exposed roof, the edges tend to go first.
The report is yours to share with whoever needs it: a seller or estate agent, an insurer, a roofer, a builder or a managing agent.
- Location
- Broad Colney (AL2)
- Region
- Hertfordshire
- Prices
- Quoted for your roof
- Report
- Written, with photos, emailed to you
- When we survey
- Weekdays and weekends
- Cover
- PI and public liability insurance
- Phone
- 07833 053749
- Page updated
- 27 October 2026
Can I check my roof myself?
The one thing to avoid is getting up close. Roofs are fragile and slippery, and falls from height are serious. That part is for a survey, using safe viewpoints and a drone where it applies.
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. Leave anything above ground level to a survey.
Local flat roofs in Broad Colney
High Elms Manor, about 4.1 miles west, is one of the historic houses in the wider area around Broad Colney. Older roofs in the wider area can hide decades of patch repairs, so the detail matters, and a listed home or one in a conservation area may need consent for changes of material. Across the South East, older homes tend to have slate or clay tiles, and many later ones concrete tiles, and flat-roofed additions turn up almost everywhere. Flat roofs fill the gaps in between, on extensions, garages, dormers and business premises.
If you look after a building such as Saint Bernadette Catholic Primary School, ponding and blocked outlets on a wide flat roof are worth catching before the next wet season. If you look after a shop, office or commercial unit, for instance near The Maltings, the flat roofs over shops and commercial units are worth checking before a leak, not after. Take an older house close to Church of St Peter: later flat-roofed additions are common on older houses, and their edges and upstands frequently show the first signs of wear.
Broad Colney is about 3 miles south-east of St Albans, in Hertfordshire. We carry out electronic leak detection for homes and businesses in Broad Colney. Our Hertfordshire coverage includes Broad Colney and the places around it. London is in our area too.
All of AL2 is within our area for electronic leak detection, from the main roads to the quietest streets. We also cover London Colney (1 mile north), Shenleybury (1 mile south-east), Tyttenhanger (2 miles north), Sleapshyde (3 miles north-east) and Colney Heath (3 miles north-east). We also work in nearby towns like Watford (6 miles south-west), Hemel Hempstead (7 miles west), Stevenage (14 miles north), St Albans (3 miles north-west), Welwyn Garden City (7 miles north-east) and Harpenden (7 miles north).
Landmarks near Broad Colney
Locally, jobs take us to homes and businesses close to The White Lion pub and Samuel Ryder Academy and the streets around them. The nearest railway station is Park Street station, about 1.9 miles north-west. Other landmarks nearby include Hilfield Castle (4.5 miles south) and Radlett and District Museum (2.5 miles south). Open spaces near Broad Colney include Verulamium Lake and Broad Colney Lakes.
What happens on the day
The visit has one job: to look at the flat roof membrane as closely as is safe and record what we find. Notes and photos go into the written report. The visit typically takes more time on a big roof than a small one, with the construction of the roof playing a part too. Cottages and farmhouses around Broad Colney often have roofs at several levels, with lean-tos and outbuildings attached. Each part is looked at from wherever it can be seen safely.
- First, we confirm which roof areas are included.
- We get the roof ready for testing.
- We work across the roof with the test equipment.
- We mark the breach locations in our records.
- The report is sent for your roofer to act on.
Getting ready for the survey
- If it is not your property yet, arrange access through the agent
- Make sure the loft hatch can be reached
- Agree roof access with the managing agent if it is shared
Book a survey
Most bookings start with a short call: ring 07833 053749 or drop us an email, and we’ll ask about the building and what you need. You will have a price before anything is arranged.
Related advice
Tips from our surveys
Small things make a difference, both for the survey and for the roof itself. Our tips:
- Limit access to the roof
- Use boards when working on the roof
- Get leaks traced quickly
- Keep outlets clear of debris
Wet insulation may need attention after a leak. Your roofer can advise on that, and moisture readings can help.
Keep outlets and gutters on flat roofs clear. Water that sits on the roof finds breaches faster.
Why act early in Broad Colney
ELD before paving, ballast or planting goes on is simpler. Covered roofs are harder to test. In a place like Broad Colney, a barn or garage roof left to fail puts whatever is inside at risk. A quick look before winter can save a lot.
All our prices include VAT. Electronic leak detection is quoted for your roof, because the method depends on the roof. You will know the price for your survey before booking.
Why choose Independent Roof Survey in Broad Colney
- Covered by professional indemnity and public liability insurance
- A sub-250g drone, flown with a CAA Flyer ID and Operator ID
- Thermal imaging and drone inspection where they help
- Independent findings on the roof’s condition
See our cost guide or two real surveys.
Towns and villages near Broad Colney
What else we do in Broad Colney
What affects the cost of electronic leak detection
Prices vary from roof to roof, and it comes down to:
- Building height and the viewpoints available
- Whether thermal imaging or a drone is needed
- Chimneys, valleys, parapets and other details
- The number of roofs, including extensions and garages
Bigger, taller and commercial roofs take more time to survey, so they’re priced to match. You will know the figure before booking.
What we need to know
The more you let us know, the easier it is to price the survey. When you contact us, tell us:
- Any stains, drips or damp patches you’ve seen indoors
- The kind of building and roof involved
- Pictures of the roof from a safe spot, if you have them
- Whether there is a loft hatch, a shared roof or tricky access
You can call us seven days a week, including Saturdays and Sundays. To book or ask a question, phone 07833 053749 or send us an email.
Broad Colney: your questions answered
How do I find out if my home in Broad Colney is listed?
Your council is the best source, with Historic England’s list for listed buildings. Both listing and conservation areas can limit changes of roofing material.
Do you cover smaller places like Broad Colney?
Yes, we do. We work right across London and South East England, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is the repair part of the test?
No. ELD is testing only. You get the breach locations with photos for your roofer to repair.
Will you fly a drone over my roof?
Where it helps and it’s safe, yes. Flights depend on the weather on the day and airspace rules, and we check for restrictions near airports before flying. We hold a CAA Flyer ID and Operator ID.
How fast do I get the report?
Each package has its own report time. Basic is within 48 hours, Standard is 24–48 hours and Premium is the same day. Mention any deadline when booking.
How much does electronic leak detection cost?
Each roof is quoted on its size and build-up. Send us details of the roof. Just call 07833 053749 or drop us an email for a quote.
Is it a structural engineer’s report?
No. We note visible signs such as sagging or deflection, but we’re not structural engineers and do not carry out calculations. If we think you need an engineer, the report says so.
What electronic leak detection does not cover
Without opening up the roof, some things stay hidden, and that sets some limits:
- Sections we cannot safely access
- Moisture spread under the membrane
- Roofs whose membrane or build-up isn’t suitable
If in doubt, call 07833 053749 or drop us an email and we will suggest the right survey before you book. What a survey covers and does not.
What this survey covers
- Liquid-applied waterproofing
- Single-ply roofs
- Flat roof membranes
- Green roofs
- Roof terraces and balconies
- Commercial flat roofs