Primacoustic THUNDERTILE Ceiling Tile, Composite, 24" x 24", Square Edge - 8 PackPrimacoustics ThunderTile Acoustic Ceiling Tile delivers exceptional sound absorption for recording applications, as well as offices, commercial retail stores, or anywhere wall treatment can't be applied. The tiles feature a 1 2" (12mm) gypsum board backing for added absorption properties. In addition, the tile is constructed from 6 lb per cubic foot rigid fiber glass, and encapsulated with a micro mesh and fiber glass facing. Each tile installs into