"The original AAMA 508 document was developed to allow panel system manufacturers a means for testing and evaluating their opaque wall panel systems for pressure equalization," said Larry Livermore (Intertek, https://www.intertek.com), Chair of the FGIA Rainscreen Test Update Task Group. "This test method has been successfully used for over ten years and has been updated to address user concerns and to provide consistency for measuring test results. The document also clarifies the scope of the test method, which is applicable to vertical walls only."
AAMA 508 establishes the requirements for test specimens, apparatus, test procedures, test reports and minimum performance criteria to be used in evaluation of water penetration resistance, cavity pressure characterization, and water entry into the cavity for an opaque panel pressure equalized rainscreen wall cladding system. It is a sister document to AAMA 509.