Flat Roof Leak Detection
– Wet Roof detection
The Wet Roof Pro’ has been designed to locate leaks on flat roofing systems which incorporate dielectric membrane overlays such as single-ply, asphalt, bitumen and liquid applied roofs. The Wet Roof Pro.
Leaks in the roof membrane allow water to penetrate to the building’s structure; creating a short circuit. Detector unit is connected to two hand-held test probes which are held in contact with the roof surface.
Typical flat roof types
Concrete roof deck
Concrete retains a surprisingly high water content. Even when concrete is ‘dry’, this ambient moisture content is enough to conduct current and test for leaks. Flaws in the membrane allow the detector to complete an electrical circuit to earth via the concrete and trigger the detector’s alarm.
STEEL roof deck
The steel structure below the roof membrane – as well as foil-faced slab insulation – conducts electrical current to earth. Faults in the membrane provide a path for current to pass through and complete an electrical circuit, triggering the alarm.
Timber roof deck
Whilst the timber structure of the roof itself is non-conductive; foil-faced insulation and water which has ‘tracked’ to earth through leaks will provide enough conductivity to test with the Dry Roof Pro’ or the Wet Roof Pro’. Many timber-deck roofs with foil-faced insulation have additional earth bonding to the insulation to aid the leak detection process.
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– DRY Roof detection
The Dry Roof Pro’ provides a rapid method of testing a wide range of roofing membrane types and thicknesses of between 64µ and 25.6mm. The kit contains everything required to start testing immediately (even batteries and charger), all contained in a robust, high-visibility transit case.
The Dry Roof Pro’ utilises the non-conductive properties of roof membranes as an electrical insulator.
As the detector passes a defect in the membrane, the current required to complete an electrical circuit reduces due to the lower dielectric strength of the membrane. As an electrical circuit is created..