1.1 This specification is applicable to manufactured poly-meric materials used to provide a rainscreen function, a meansfor the drainage of liquid moisture and the ventilation of vapormoisture that enters an above-grade exterior wall assembly.Rainscreen materials that comply with this specification areintended to be used behind exterior cladding products andintended to cover one hundred percent (100 %) ofthe wall areathat is designed to provide a rainscreen function to resist waterinfiltration.
