The door frame now sticks out past the drywall about 1 4 due to the old plaster being about 3 4 thick and the now the drywall is only 1 2.
Drywall extends past door jamb.
Door frame extends past drywall my issue now is trying to trim around the doors.
Measure at several spots on the doorjamb and use the largest dimension.
It is an old house 1920 s 2 story that had 2 layers of lathe and plaster on it.
Not everything is perfect.
Tools used on this job.
For areas where the jam was slightly short he would take a razor blade and score the drywall about 1 4 in from the edge of where the trim would sit then take a hammer and punch down the dw even with the jam.
So the outside edge of the trim would be on intact dw but under the bulk of the trim the dw was smashed down.
Step 2 use a 1 by 4 and cut the jamb extension.
I have a homeowner who has window and exterior door jambs that extend past the drywall by about 1 1 2 inches.
As an amazon associate i make.