* Cut out the center section of the damaged tile with a utility knife. Slide the edges away from the surrounding tiles.
* Trim the upper lip of the grooved edges of the new tile with a utility knife and straightedge. If necessary, also remove one of the tongues.
* At the ceiling, apply construction adhesive to the furring strips. Install the new tile, tongue first, and press it into the adhesive. Tip: To hold large tiles in place while the glue dries, lay a flat board across the tile, then prop a 2 × 4 post between the board and the floor.
