A water test, also commonly referred to as a flood test, is a test that roofing contractors perform to ensure that your flat roof's membrane is still sealed and intact. To perform this test, your roofing contractor will use a controlled water source to fill your flat roof with a shallow layer of water (often less than 25mm) to check if the roof is leak-proof. If there happen to be any leaks inside the house prior to the test, this can help your roofing contractor pinpoint the