Detecting the cause of leaks on flat roofs

Is water seeping in, and does it seem as of the problem cannot be resolved? If so, it’s time to call in a roofing expert at Coverto to identify the cause of the leak. Have an expert detect the leak.

Coverto is specialised in leak detection and has several devices at its disposal for this purpose. Depending on the problem, the type of roofing and the situation, our specialists will determine the most appropriate investigation strategy.

When detecting a leak, the knowledge of the expert on the roof is the decisive factor. This person must be an expert in the various types of roof waterproofing with their specific finishing details, have a perfect knowledge of the thermal structure of the building, be aware of all the thermal bridges, and so on. Without this knowledge, it is impossible to accurately determine the cause of the problem, let alone present the right solution.


Our tools:

  • High voltage test

    When conducting this non-destructive test, we use an electrode brush to transfer high-voltage electricity across the entire surface of the roof. If the roof cladding is damaged, an electric circuit will be completed, and sparks will be discharged. This will cause the device to emit an alarm signal. Depending on the device used and the structure of the roof, this test can only be conducted on completely dry or slightly moist non-conductive roof cladding.

  • Smoke test

    In a smoke test, we blow smoke below the roof cladding, which will become visible at certain locations. We expect to see smoke at some locations, but not at others. Based on an analysis of the visible smoke, we can assess whether these locations are the cause of the leaks. This test can be used on roofs where the smoke can travel between the underlying structure (insulation) and the roof cladding.

  • Low voltage test

    This non-destructive low-voltage test uses the vector mapping or earth leakage method to find the location of damage. The conductive properties of water provide a medium through which electricity can pass, enabling the user to find the location of leakages. Leakages in the roof membrane allow water to permeate into the structure of the building, causing a short circuit. The voltage difference between two test probes can lead the user to the location of the leakage. This test can only be used on wet, non-conductive roof cladding.

  • Thermography

    In this test, we measure the surface temperature of the roof cladding using a thermographic camera. Since wet insulation is less effective than dry insulation, a difference in the surface temperature of the roof cladding can be a sign of moisture infiltration in the roof structure. The location and scope of the problem can be identified using this method. Zones where the roof insulation has been affected can be identified using this method.

  • Moisture meters

    The presence of moisture in the roof structure can be detected using non-destructive moisture meters. The location and scope of the problem can be identified using this method. Zones where the roof insulation has been affected can be identified using this method.

  • Common sense

    All the methods set out above are tools used for investigative purposes, but require the correct interpretation of the results. A thorough knowledge of the requirements of the WTCB and manufacturers, construction details, the thermal operation of the building and, above all, common sense are of crucial importance for this.

A few videos of our tests:

The importance of leak detection

Detecting moisture infiltrations

Once the leak has been detected, we can pinpoint precisely where the moisture is seeping in, and what is causing the problem.

Repair advice

Depending on the cause, our specialists can also recommend the best solution. If desired, we can also handle the repair work for you.

No more frustrations

A leak can be the cause of considerable frustration. We will be happy to alleviate your concerns so that you or your tenants can once again be assured of the carefree enjoyment of the property.

About Coverto

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Our expertise

Coverto has more than twenty years of expertise in flat roofs.

  • Roof management
  • Roof inspections
  • Leak detection
  • Watertightness tests
  • Project support
  • Expert’s inspection

  • Our expertise
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    Our approach

    Each roof is unique. Depending on your needs and requirements, we will find the most suitable approach for you.

    • Initial, obligation-free introduction
    • Clear quotation
    • Perfect execution of the order
    • Optional report

  • Our approach
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    Our promise

    Our mission is to extend the lifespan of every roof. A roof should have a lifespan of 40 to 50 years, but is installed to last only about 10 years. This should not be allowed!

    Taking proactive action and calling in an expert like Coverto will help you significantly extend the lifespan of your roof.

  • Our promise
    • Do you have a question about your roof?

      As independent specialists in flat roofs, we are happy to speak to you honestly and objectively. Get in touch with us today!
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      Where to find us?

      Address: Industriezone 28B, 9770 Kruisem
      Tel: +32 (0)9 391 32 36

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