Detecting and locating leaks in low slope roofs

An apparatus for detecting a leak in a roof, where the roof comprises a generally horizontal roof support deck with a water impermeable membrane applied onto the upper surface of the support deck where at least a component of the support deck is conductive, the apparatus comprising:

• a detection assembly;
• a conductor arrangement for location on the roof above the membrane, the conductor arrangement being arranged for connection to the detection assembly;
• the conductor arrangement being mounted for movement across the roof to different locations thereon;
• a return conductor arrangement for electrical connection to the support deck the conductor arrangement being arranged for connection to the detection assembly;
• the detection assembly being arranged for detecting changes in capacitance between a first conductor defined by the conductor arrangement and a second conductor defined by the conductive component of the support deck caused by presence of moisture between the first and second conductors;
• the detection assembly being arranged for providing an output indication of the presence of moisture in response to the changes.