Figure 5-4.Corner and casing beads.
Because adhesives are matched with specific materials,
be sure to select the correct adhesive for the job. Read
and follow the manufacturers directions.
A number of metal accessories have been developed
to finish off or protect drywall. corner beads (fig. 5-4)
are used on all exposed comers to ensure a clean finish
and to protect the drywall from edge damage. corner
bead is nailed or screwed every 5 inches through the
drywall and into the framing members. Be sure the
corner bead stays plumb as you fasten it in place. Casing
beads (fig. 5-4), also called stop beads, are used where
drywall sheets abut at wall intersections, wall and
exposed ceiling intersections, or where otherwise
specified. Casing beads are matched to the thickness of
the drywall used.
When laying out a drywall job, keep in mind that
each joint will require taping and sanding. You therefore
should arrange the sheets so that there will be a
minimum of joint work. Choose drywall boards of the
maximum practical length.
Drywall can be hung with its length either parallel
or perpendicular to joists or studs. Although both
arrangements work sheets running perpendicular afford
better attachment. In double-ply installation, run base
sheets parallel and top sheets perpendicular. For walls,
the height of the ceiling is an important factor. When