A casing bead apparatus includes a base panel with at least one opening through the base panel. With the apparatus mounted at a vertical wall, the base panel is disposed along the vertical wall. A stop bead wall extends from the base panel. The stop bead wall includes a first side, a second side opposite the first side, and a flange at a distal end of the stop bead wall distal from the base panel and extending partially over the base panel. A spacing element is disposed at the second side of the stop bead wall. An adhesive element is disposed at the spacing element. With the apparatus mounted at the vertical wall, the adhesive element engages a horizontal surface perpendicular to the vertical wall to adhesively attach the apparatus at the horizontal surface and the spacing element is disposed between the stop bead wall and the horizontal surface.