i need to install interior doors without casing, just drywall to the jamb. i've heard the most common way to do this is with a jamb equal to the width of
the framing containing a kerf into which a special asymetrical cornerbead is
inserted.

i've searched for this cornerbead and it appears to be made only in bullnose.
it's designed so that you can caulk one corner into the jamb and finishe the other side with drywall mud (the side of the corner that is flush with the wall).

my job requires square corners. if i use regular square cornerbead, i'll have
to apply mud on the "short" corner as well. in other words, i'll have a strip
of mud 1/2 wide that probably won't be very durable.

a drywall "L" moulding would solve the problem, but i've only seen those in 5/8"
which wouldn't be long enough to slip into the kerf cut.

anyone have any experience doing this?

thanks for any help.

 

A tape-on metal corner will work. You may not need to kerf the jamb.
USG stuff (a .pdf - needs Adobe reader)
A walls/ceilings supply house might be your best bet for spec beads and trims.

 

We did a lot of openings w/o casing years ago in stores.
We used "reveal mold", which is like J mold, but with an extension on the back that produces a ½" X ½" reveal around the doorframe.
Any drywall supply will have an assortment of special trim.