Installing Drywall Corner Bead
There are two main types of beads for corners; pre-taped and metal.
The strictly metal type tends to be less expensive and yet is for outer
corners only. While the pre-taped, allows for some adjustment right after the bead is installed, and
is designed for straight right angle corners (both inside and outside). The outer metal bead can go on corners
of 90 degree only. Old School drywallers almost always opt for metal.
For pre-taped corners (outer and inner)
: broad knife
mud onto the open seam with a mix of the right consistency. You will
want to have the corners measured out and cut with snips, set aside, and prepared
to put up before mudding. If there is a burr from cutting this should be moved toward
the unexposed backside with a gentle turn of the pliers.
At the mid wall joint, overlap the corner paper with normal paper tape.
There should be no overlapping at the ceiling-to-corner joint.
For metal corners
(outer only): tack on pre-cut
strips with their lengths based on ceiling height. Be aware of the tightness of
the metal corner onto the wall surface. Too loose, can mean a cracking
apart of the mud. Too tight, can bow the bead. The metal band should
be flush onto the gypsum. Apply the mud on one side, filling the void,
and then leveling continuously with your broad knife before proceeding.
Don't be concerned about buildup on the outer edge as this is easily
removed when dry.
For inside corner
(greater or less than a right angle):
check into the option of the flex bead from your local drywall outlet
or distributor. The rigid bead helps maintain straightness. Or apply
regular paper tape but this is not as near as easy a task.
Use a broader knife on these joints to straighten over the distance.
An extra coat or two of mud can go a ways toward straightening.
Order of Applying Beads:
Many drywallers find success with the principle of starting high and working down.
Paper normally on top of metal. Other than that, find out by experimenting; you will find that the stages
go smoother and smoother with each trial.