It is an old house 1920 s 2 story that had 2 layers of lathe and plaster on it.
Drywall extends past door jamb.
Measure the distance from the edge of the doorjamb to the face of the drywall to determine the thickness of the jamb extension.
Not everything is perfect.
Measure at several spots on the doorjamb and use the largest dimension.
Door frame extends past drywall my issue now is trying to trim around the doors.
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.
Step 2 use a 1 by 4 and cut the jamb extension.
Tools used on this job.
It s important to know what to do in less than ideal situations.
As an amazon associate i make.
I have a homeowner who has window and exterior door jambs that extend past the drywall by about 1 1 2 inches.