The Most Advanced Façade Systems on the Market Today. Rain screens provide limitless design options for building façades while controlling moisture and reducing energy consumption. Knight Wall Systems manufactures versatile, ventilated rain screen façades that accommodate an expansive array of cladding options. Knight's LEED-rich continuous-insulation Dow™-Knight CI-System, has been designated an Environmental Building News Top-10 Green Building Product. Knight Wall Systems: Where building envelope technology meets sustainability.