AAMA 501.2-15 defines a standardized procedure for conducting field water leakage testing on fixed glazing systems, including storefronts, curtain walls, and sloped glazing assemblies. This diagnostic field check evaluates the integrity of non-operable components—such as permanently sealed joints, gaskets, and frame intersections—to verify their ability to resist water penetration. The test is commonly performed after installation and before interior finishes are applied, allowing for early identification and correction of deficiencies.
This procedure is not a performance test simulating wind-driven rain, but instead serves as a quick, efficient, widely accessible quality control measure to ensure the proper execution of sealant applications, framing connections, and other critical water management details.
The AAMA 501.2 test involves controlled application of water to exterior framing members using a specific spray nozzle and water pressure, applied at a fixed distance from the test area.
While the test is conducted, an observer inside the building inspects for water penetration using a flashlight as necessary to detect moisture infiltration.
^ Back to TopWater leakage is defined as any uncontrolled water appearing on normally exposed interior surfaces, including the following:
Water that remains contained within properly drained flashings, gutters, or sills is not considered a failure.
^ Back to TopThe test report must include the followuing:
AAMA 501.2 testing is widely utilized in:.
Unlike ASTM E1105, which evaluates air and water infiltration under a static pressure differential, the AAMA 501.2 test is performed without inducing an artificial pressure difference between the building’s interior and exterior. Instead, this method applies water spray directly to fixed joints and components at a controlled pressure, rate, duration, and distance, simulating water exposure without the influence of wind or pressure-driven infiltration.
This distinction is critical: AAMA 501.2 does not simulate wind-driven rain. Instead, it is used to identify localized failures in joint sealant applications, glazing gaskets, and system interfaces—all before interior finishes are applied, reducing costly rework and long-term liability.
^ Back to TopBecause AAMA 501.2 only applies water without pressure differentials, it is an effective tool for identifying improper sealant applications, misaligned framing members, and compromised gaskets—all issues that may not immediately manifest under ASTM E1105 but could result in long-term failure when subjected to actual wind loads.
This targeted, controlled method allows construction teams, envelope consultants, and glazing contractors to identify and resolve water leakage issues before costly repairs become necessary, ensuring long-term durability and code compliance for the installed system.
^ Back to TopIndependent studies, industry papers, slideshows, video presentations, and other content benefiting those in the industry with the patience to read five pages, and diagrams for the developers.
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