The Roofing and Waterproofing Test Association was formed by the coming together of established independent UK test houses whose main operations are in the testing of waterproofing systems in the built environment. There are two distinct operations in that respect: the detection of leak sources in existing installations and the testing and certification of newly installed membranes and systems.
Over the past 3 decades, electronic testing, otherwise known as earth leakage or EVFM testing, has become the UK standard for determining the integrity of roof coverings and structural waterproofings. In that respect it has surpassed flood testing, due to its speed, accuracy, cost and environmental impact.