Performance Standards for Metal Rainscreen Wall Systems

摘要

In recent years, rainscreen wall systems utilizing metal cladding panels have become an increasingly popular choice for architectural exteriors. Currently, there are few metal panel manufacturers that offer a weathertight-ness warranty on a complete rainscreen assembly, and water-resistive barrier warranties are generally limited to defective material replacement only. So, the general contractor and subcontractors assume much of the liability for the. weathertightness of these systems. The performance testing and requirements applicable to rainscreen wall systems may be less familiar to industry professionals than those for metal roofing systems. Principal among the testing standards for rainscreen wall panel systems are the American Architectural Manufacturers Association (AAMA) 508 and 509 testing protocols. These two standards aim to validate and quantify the weather resistance of a rainscreen wall system.