I am replacing an old door in an old house. The current door does not seal good and the door jambs are in bad shape, so I want to remove everything down to the frame and start over with all new material. On one side of the door is a brick wall that runs 90degs. to the door, The door is not standerd size, it is smaller than normal so I will have to cut it down to size. I am going to have to attach the jamb on that one side right to the brick. I believe the current jamb is glued to it, and very drafty in the winter. What is the best way to attach that part of the door jamb to the brick, and once it is attached, what is the best way in insulate around it to keep drafts out? Thank you for any feedback anybody can give me.