Johns Manville Spiracoustic SKU SCBOARD Please select 1" SPIRACOUSTIC BOARD 18"-30"1-1/2 SPIRACOUSTIC 22"-38" 2" SPIRACOUSTIC BOARD 26"-58"1" SPIRACOUSTIC BOARD 30"+UP 2" SPIRACOUSTIC BOARD 54" & UP1" SPIRACOUSTIC BOARD FOR8-16"2" SPIRACOUSTIC BOARD 18"-24" Log in to view price