If you’re replacing an existing door, you may need only a door blank. However, in new construction you may need to buy the door blank plus the materials and accessories used to assemble the door and frame unit.
Today, almost all doors installed on home in Hawaii are the pre-hung type. In the past, most homes were single wall T & G Construction and the door opening had to be exactly framed with clear 2x4s or 2x6s.
Today, most homes being built are double wall construction with 2x4s, 16” on center. This makes the installation of pre-hung doors much easier.
Most pre-hung door kits come with the frame, door and hinges, which are already installed in the frame. Also, the holes for the doorknob and latch are already pre-drilled.
The first step is to determine the size door opening you want. Most interior doors are 1 3/8” in thickness, 30”, 32”, 36” in width and 6’8” in height.