Holiday Detector Test Roof Survey - HDT

Holiday Detector Test

Often referred to as the “dry test”. This method of flat roof electronic leak detection is ideal for use on any flat or low pitched roof to identify breaches in exposed membrane systems allowing for a quicker testing schedule identifying imperfections such as pinholes and punctures. This test can only be performed in dry conditions.

METHOD

The detector delivers, via a phosphor-bronze brush, a stabilised D.C. output voltage across the non conductive waterproofing membrane under test. Detection of breaches is by an audible tone and a visual spark from the search electrode (brush).

Roof Survey Holiday Detector Test

Earth Leakage Leak Detection Roof Survey

Earth Leakage Leak Detection

Often referred to as the “wet test”. This method of flat roof electronic leak detection is ideal for use on any flat or low-pitched roof to identify imperfections in exposed membrane or ballasted systems. This test is performed in wet conditions (rainfall) or with a hosed down wetted test area.

METHOD

A pulse generator emits pulses with a voltage of 40V which are conducted onto the roof structure via a wire ring circuit. Since all roof membranes are more or less non-conducting, the electrical pulse chooses a path across the moisture to where the leak is located and then flows over the damp roof in all directions to reach the ring circuit.

We can now determine the currents direction of flow and trace it back to its source. This source is exactly the spot where moisture is penetrating the roof membrane.


Metal deck with foiled faced insulation and PVC membrane

Metal deck with foiled faced insulation and PVC membrane

Holiday Detector Test

Dynamic Area Mapping

Metal deck with tissue faced insulation and PVC membrane

Metal deck with tissue faced insulation and PVC membrane

Holiday Detector Test

Dynamic Area Mapping

Plywood deck with foiled faced insulation and PVC membrane

Plywood deck with foiled faced insulation and PVC membrane

Holiday Detector Test

Metal deck with tissue faced insulation and PVC membrane

Metal deck with tissue faced insulation and PVC membrane

Holiday Detector Test

Metal deck with any insulation, Plywood and fleece lined PVC membrane

Metal deck with any insulation, Plywood and fleece lined PVC membrane

Holiday Detector Test

Metal deck with any insulation, Plywood and liquid applied

Metal deck with any insulation, Plywood and liquid applied

Holiday Detector Test

Concrete deck with tissue faced insulation and EPDM membrane

Concrete deck with tissue faced insulation and EPDM membrane

Visual Inspection

Metal deck with any insulation, 2 layers of bituminous felt and 1 layer felt

Metal deck with any insulation, 2 layers of bituminous felt and 1 layer felt

Holiday Detector Test

Dynamic Area Mapping

Plywood deck with any insulation, 2 layers of bituminous felt and 1 layer felt waterproofing

Plywood deck with any insulation, 2 layers of bituminous felt and 1 layer felt waterproofing

Holiday Detector Test

Dynamic Area Mapping

Hot Melt Roof

Hot Melt Roof

Dynamic Area Mapping

Inverted roof -ballast

Inverted roof -ballast

Not Testable Unless Layer Removed

Inverted roof - paving

Inverted roof - paving

Not Testable Unless Layer Removed

Ballast roof

Ballast roof

Dynamic Area Mapping

Green Roof

Green Roof

Dynamic Area Mapping

Asphalt roof

Asphalt roof

Holiday Detector Test

Dynamic Area Mapping

Our Services

Surveyroof can find the point of entry quickly and accurately using our cost effective electronic leak detection methods and thermal imaging surveys.

Membrane Condition Surveys

Electronic leak detection and integrity testing on flat roof and waterproofing membranes for Industrial buildings.

Industrial Roof Surveys

We will identify the condition of your metal roof or pitched tiled roof areas using our Visual inspection methods.

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