How Do You Install Exterior Door Jambs?
Exterior door jambs are the single most important factor in the security of your outside doors. In modern construction, door jambs are typically installed as a single unit known as a pre-hung door. Door jamb frames have four principal components. The foundation of the jamb is the lower plate known as the threshold. The top horizontal piece is known as the jamb header. The two are connected by the two outside vertical uprights known as jambs. Set your pre-hung door and jamb into the opening with the brick mold trim to the outside. Center the door in the opening. Wedge shims between the wall frame header and the top side of the horizontal jamb header. Nail up through the header and shims into the frame above the door. Set a level on the front edge of the hinge-side jamb. Move the threshold in or out to adjust the bubble until it lines up in the center of the indicator. Wedge shims behind the center of the jamb-side hinge against the stud. Set the level on the front edge of the knob side
