This test method also simulates a 44 mph wind-driven rain event in small, segmented areas using a standard 3/4 inch diameter hose in which a calibrated nozzle is attached with a calibrated pressure gauge. The spray is directed at a specific joint, crack, or defect to reveal potential water leakage and assist in identifying the point of entry and path of travel of suspect moisture intrusion.
Test simulates a wind-driven rain condition on a specific assembly and/or component. It can be useful in determining a specific cause and origin of moisture infiltration when it is used to test individual components of an exterior envelope area or assembly. Specific assemblies and/or interfaces of assemblies are isolated and subjected to controlled amounts of moisture instead of spraying water over a large area in an uncontrolled manner that will not reveal specific components or conditions that are the cause of water infiltration.