A building panel includes a facer sheet having opposed side joints, a liner sheet, a core material bonded between the facer and liner sheets, and at least one false joint formed in the facer sheet extending between the side joints such that the facer sheet is a continuous sheet across the at least one false joint. The at least one false joint includes a base surface extending into the foam core, opposing side surfaces connecting the base surface to the facer sheet, and a tab formed on each opposing side surface at one of the side joints. The tabs are folded under the one side joint.