When it comes to frameless doors flush primed door panels are the top choice for many designers due to their versatility.
Door jamb not flush with drywall.
If you have or want to purchase a biscuit jointer they do a nice job of keeping your extensions sturdy and lined up with the jambs.
Flush grooved primed door panels are similar in that they.
However you can certainly use it to create a 2 tone look as well where the door panel is different from the wall color.
The drywall is shaved to allow the casing to sit flat on the wall and on the frame.
While preparing a door frame for casing we notice the drywall is not flush with the door frame.
The hinges or the edge of the door are making contact with the jamb prior to the door completely being closed.
Nail through the shims and then trim the shims flush to the outside edge of the casing.
Flush primed door panels are ideal when you want your wall and door color to be the same.
This is caused by over shimming the door jamb opposite the hinge side.
They can be shimmed on the outside edge using stock cedar shims every 12 to 15.
Watch a simple way to build and install your own wood trim that also solves a common problem with drywall that extends too far past door and window jambs.
If not i think your best option is going to be to build the extensions proud of the wall and then bring them down flush with a power planer or belt sander.