A Flat Roof Leak You Can’t Trace in London? 

Book an Electronic Leak Detection Survey in London for Flat Roofs, Balconies, and Waterproof Membranes

You’ve got damp patches, ceiling stains, or mould — but no one can tell you where it’s coming from. Our qualified surveyors use non-invasive electronic leak detection to pinpoint the source of hidden leaks in flat roofs, terraces, and roof membranes — without damage or guesswork.

⚡️ Same-week availability

👷🏽‍♂️ RICS Standard

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Still Dealing with a Leak in Your Flat Roof That No One Can Locate?

At Prime Building Care, we specialise in electronic leak detection surveys across London — and we understand the frustration of water ingress with no clear source.

✅ You’ve got damp patches, ceiling stains, or mould — but contractors keep guessing.

✅ You’ve tried patch repairs, but leaks return after rain — and no one agrees on the cause.

✅ You need proof of where the water’s coming from — not another vague opinion.

✅ You’re dealing with a balcony, terrace, or flat roof and suspect a membrane breach.

✅ You need clarity before escalating repairs, making an insurance claim, or buying the property.

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The Real Cost of Flat Roof Neglect — And Why Prime Building Care Does It Differently

At Prime Building Care, we’ve seen the long-term damage hidden leaks cause — swollen ceilings, structural decay, persistent damp, and insurance claims denied for lack of evidence. The real danger? It’s not just the water — it’s the misdiagnosis.

Time and again, we’re called in after contractors blamed the wrong issue, patched the wrong area, or missed the breach entirely. We’ve surveyed properties where expensive roofing works failed — because no one pinpointed the leak source with certainty.

That’s why we do things differently.

Our electronic leak detection surveys in London use non-invasive pulse and vector mapping to locate leaks in flat roofs, balconies, and waterproof membranes — accurately and without damage. Every inspection is conducted by a qualified building surveyor, and every report includes high-resolution photos, moisture diagnostics, and clear next steps.

No guesswork. No overselling. Just evidence-based clarity — so you can make the right call, the first time.

We Do What No One Else Does

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Precise Roof Diagnosis — Without the Sales Pitch

Our surveyors don’t guess or upsell. We inspect flat roofs  with Electrical Leak Detection equipments across London to identify any flaws in the invisibles structure of the roof— with pinpoint accuracy and zero disruption.

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Clear Evidence from Qualified Building Surveyors

Every survey is carried out and reviewed by a RICS-qualified building surveyor trained and accredited in the use of electronic leak detection equipment. You’ll receive a clear, photographic report that pinpoints the exact source of the leak — along with expert, unbiased recommendations to help you resolve it properly.

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Stop Wasting Money
on Holding Repairs

We’ve surveyed properties where clients were quoted for full roof replacements — when the leak was caused by a single membrane breach. Our diagnosis-first approach helps you avoid unnecessary works and resolve the issue properly the first time

Stress-Free Roof Solutions in Three Simple Steps

Step 1

Book Your Electronic Leak Detection

Choose a convenient time for one of our qualified, RICS-accredited surveyors to visit your property. No call-out fees. No sales pressure. Just a focused inspection booked on your terms.

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Step 2

Onsite Electronic Leak Detection

Using advanced electronic testing equipment, we trace hidden leaks in flat roofs, balconies, and waterproof membranes. Our non-invasive process pinpoints the breach — no damage, no dismantling.

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Step 3

Receive Your Clear Report & Action Plan

Within 3–5 working days, you’ll receive a professional photographic report showing exactly where the issue lies — with expert, plain-English recommendations on how to resolve it properly.

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Need Electronic Leak Detection in London?
Here’s How It Works

Curious how our experts trace hidden leaks in flat roofs, balconies, or waterproof membranes?

At Prime Building Care, we use advanced Electronic Leak Detection (ELD) methods to pinpoint breaches with precision — no damage, no guesswork. Whether you’re managing a home, block, or commercial unit, we make leak detection fast, accurate, and fully reportable across all London boroughs.

Trusted By Leading Housing Providers and Managing Agents

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Pricing

£450

Residential Flat Roof
Upto 60 sqm

Get a detailed Electronic leak inspection using advanced electronic detection equipment. We’ll test the full roof or balcony membrane, trace any breaches, and provide a photographic report from a qualified building surveyor — ideal for standard London terraces, balconies, or extensions.

£650

Medium or Terrace Roof
Upto 100 sqm

Perfect for larger flat roofs or multi-surface terraces. Includes electronic pulse or vector mapping survey, moisture diagnostics, and a formal report outlining defects, causes, and recommendations. Trusted by landlords, agents, and buyers needing accurate evidence before acting.

Price On Application

Large or Complex Roofs

Perfect For commercial buildings, multi-block developments, or specialist membranes, Includes electronic pulse or vector mapping survey, moisture diagnostics, and a formal report outlining defects, causes, and recommendations. Trusted by landlords, agents, and buyers needing accurate evidence before acting.

Pricing is provided on a bespoke basis depending on roof size, system complexity, and access requirements.

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“Our flat roof kept leaking after every heavy rainfall, and we’d wasted months on patch repairs. Prime’s electronic leak detection survey found the exact source quickly, and their report gave us a clear, actionable plan to fix it properly ”

— Josh L., Southwark

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 Electronic Leak Detection SUrvey FAQs
Everything You Need to Know Before You Book

  • An ELD Survey uses low-voltage or vector mapping technology to detect breaches in flat roof membranes, terraces, or balconies. It’s ideal when there’s unexplained water ingress or failed waterproofing — especially after rain or when buying or managing property with inaccessible roofs.

  • ELD pinpoints even the smallest membrane punctures, failed seams, perimeter detailing issues, trapped moisture, or water tracking beneath insulation layers in flat roofs. It’s far more accurate than visual inspection alone.

  • You’ll receive a photographic report showing defect locations, descriptions of findings, moisture diagnostics, and professional recommendations — perfect for tendering, repairs, or insurance documentation.

  • Pricing starts from £450+VAT for small residential roofs (under 60 sqm). Medium roofs typically cost £650+VAT. Larger or complex commercial roofs are quoted case-by-case based on size, height, and access.

  • We offer same-week availability across London, subject to property type and location. Emergency roof leak assessments may be available sooner — just WhatsApp us to check.

  • Yes — we survey private flats, houses, commercial blocks, balconies, terraces, and complex roof systems. We also support property managers and developers with multi-unit inspections.

  • We’re 100% independent. Our surveys are carried out by qualified building surveyors and leak detection professionals — not sales reps or roofers with an agenda.

  • Absolutely. Many clients use our survey reports to verify quotes, understand repair scopes, or avoid upselling from contractors.

  • Absolutely. Our reports are often used to challenge incomplete repairs, validate warranty claims, or provide a trusted baseline for contractor tenders.

  • ELD is highly accurate — typically pinpointing breaches within a few centimetres. Unlike traditional methods, it doesn’t rely on visual symptoms alone and reduces the risk of unnecessary stripping or trial repairs.

  • Yes — we encourage it. A brief call helps us understand your issue, explain the process, and ensure this is the right service for your roof before any commitment.