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Electronic Leak Detection for Flat Roofs

Non-destructive testing that finds breaches in your waterproofing membrane, including pinholes a visual inspection will never pick up. Nationwide coverage, RICS regulated.

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0844 335 1822
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A long-handled brush sweeping a flat roof waterproofing membrane during electronic leak detection preparation, with a construction site visible below.

Patched Four Times and Still Leaking?

Most flat roof leaks get patched, not fixed. A contractor does a visual inspection, spots the obvious damage, and applies a repair. Next time it rains it starts leaking again because the actual breach was never found.

We see buildings that have been patched three or four times before anyone calls us. By then the insulation is saturated, the deck is at risk, and the cost of getting it right has skyrocketed.

Electronic Leak Detection (ELD®) tests the integrity of the waterproofing itself. It finds breaches down to pinhole size. You get evidence of exactly where the membrane has failed, and what needs doing about it.

Non-Invasive Testing for Precise Leak Location

At RAM, we use the latest Electronic Leak Detection (ELD®) technology to ensure your roof or membrane systems are watertight and functioning properly. Our expertise lets us quickly locate and address leaks before they cause major issues. By using ELD®, RAM keeps your building protected from water ingress, reducing long-term costs and preventing potential structural damage.

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RAM Building Consultancy technician performing electronic leak detection on a flat roof waterproofing membrane.

What an ELD® Survey Gives You

Close-up of liquid water pooling and running across a flat roof waterproofing membrane at a metal edge trim joint.

Breaches Located and Mapped

We test the membrane across the agreed area and mark every breach we find, down to pinhole size. You get exact locations, not an approximate zone.

Open lift with buckets on the floor collecting water, indicating an active roof leak in a building.

A Report You Can Actually Use

Photographic evidence of every defect, our test methodology, and clear remedial recommendations. Clients use our reports as schedules of work for their maintenance teams, or as specifications to tender contractors against.

A RAM Building Consultancy surveyor carrying out electronic leak detection on a flat roof waterproofing membrane.

No Damage to Your Roof

Nothing is cut, drilled, or removed. The test is non-destructive, so your warranty stays intact and there's no disruption to the building below.

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Related Case Studies

Kelloggs

RAM Building Consultancy was engaged to resolve multiple roof leaks at a 100-year-old factory on th…

Primark

RAM Building Consultancy was called in to assist a large Primark store facing multiple leaks in the…
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    RICS Regulated

    RICS is an independent professional body originally established in the UK by Royal Charter. You can take confidence from the mark ‘Regulated by RICS’ as an assurance of quality. RICS is the world’s leading qualification when it comes to professional standards in land, property and construction.

    RICS
    Dominos
    Nestle
    JLL
    NHS
    Westfield
    TFT

    How an ELD® Survey Works

    Free
    Assessment

    Tell us what's happening. We'll come to site or jump on a call, free of charge, to understand the problem and check roof access.

    Fixed-Fee Proposal

    You get a clear scope and a fixed price. No day rates that creep, no surprises.

    On-Site
    Testing

    Our engineers test the agreed area and mark every breach. Most surveys are completed in a single visit.

    Report and Recommendations

    Full photographic report within 10 working days, with remedial recommendations you can act on immediately.
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    Frequently Asked Questions

    What is Electronic Leak Detection?

    ELD® is a non-destructive test that uses electrical current to find breaches in a waterproofing membrane. A charge is applied across the membrane surface and any break in it, including pinholes too small to see, shows up as a path for the current to earth. It is used on flat roofs, green roofs, balconies, terraces and podium decks.

    Does ELD® test my whole roof?

    It tests the area we agree in the proposal. That might be the full roof or a defined section, depending on what you need and what your budget allows. We will be clear about the scope before we start, and clear about what falls outside it.

    What is the difference between ELD® and Dynamic Leak Investigation?

    ELD® checks whether the membrane is intact. Dynamic Leak Investigation (DLI®) traces where water is actually getting into the building. If you are verifying a new roof or checking one before a warranty runs out, you want ELD®. If water is coming in right now and you need to know why, you want Dynamic Leak Investigation (DLI®). We will advise which fits during the free assessment.

    How much does an ELD® survey cost?

    Surveys start from £575. Price depends on roof area, access and whether other testing is needed alongside it. You get a fixed-fee proposal before any work is booked.

    How quickly can you get to site?

    We can typically be on site the next working day. New clients go through a short onboarding and credit check first, which typically adds a few days. If you are likely to need us at some point, it is worth getting that out of the way in advance.

    Do you work across the whole UK?

    Yes. We are based in Bedford and work nationwide, including London, the Midlands and the North. Travel is included in the proposal, so there are no add-ons afterwards.

    Not Sure What You Need? Let's Take a Look.

    Book a free assessment. We'll come to site or set up a call, look at what's happening, and tell you which test will answer your question — even if that turns out to be no test at all.

    No obligation, no charge, and no sales pitch.

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