ACOUSTICAL BUILDING PANEL， MONOLITHIC SURFACE COVERING SYSTEM INCORPORATING AN ACOUSTICAL BUILDING PANEL， AND METHODS OF FORMING AND INSTALLING THE SAME

An acoustical building panel is disclosed that comprises a fibrous panel comprising: a central portion having a first major surface; a perimeter portion surrounding the central portion; a recess press-formed into the perimeter portion， the recess circumscribing the first major surface and comprising a recess floor surface; a second major surface opposite the first major surface; and side edge surfaces that define a perimeter of the fibrous panel and extend from the second major surface to the recess floor surface.