Remove all items from the walls and floor of the room.
Spread the thin-set brick adhesive on the wall in a four-foot-long strip tall enough for one row of brick tiles. Place brick tiles against the adhesive on the wall, leaving a small gap between each tile.
Repeat this process until you reach the end of the wall.
Spread another four-foot-long layer of thin-set adhesive above the first line of bricks. Place the first brick so that its center is on top of the place where the two bricks below it touch.
Repeat this process for the entire wall, laying the brick tiles in four-foot sections from one end of the wall to the other.
Fill any empty spots left in the wall with half-sized brick tiles.
Repeat the brick tiling process for the room's remaining walls.