On May 13, 5:44*pm, "Jon Danniken"
wrote:
I am removing a section of drywall and replacing it with some rockboard
(durock, hardibacker, etc.)

Can I just cut the existing drywall flush with the existing stud, then add a
second "stud" by attatching it to the existing stud (with fasteners), and
then attaching the rockboard to that new "stud"?

Sure.

R