Pre-hung door assembly and method of installation

A method of installing a pre-hung door assembly in a rough opening in a building, the method comprising:

• providing a pre-hung door assembly comprising a jamb assembly, a door, a plurality of hinges securing the door to the jamb assembly, and a plurality of mounting brackets for securing the jamb assembly to at least one building frame member adjacent the rough opening;
• inserting the pre-hung door assembly into the rough opening from an interior of the building;
• securing the mounting brackets to a first vertical frame member adjacent the rough opening using a plurality of fasteners;
• opening the door of the pre-hung door assembly after securing the mounting brackets to the at least one frame member;
• and
• securing the jamb assembly to a second vertical frame member positioned on an opposite side of the rough opening as the first frame member using a plurality of fasteners.

A kit for installing a door in a rough opening comprising:

• a door frame extending around a perimeter edge of a door panel;
• a plurality of hinges attaching the door panel to the door frame comprising a pre-hung door assembly;
• and
• a plurality of mounting brackets attached to the pre-hung door frame, wherein the mounting brackets attached to the interior surface of the rough opening support the door panel for opening and closing before the door frame is attached to the rough opening.