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.

The actual installation of the door frame involves seven easy steps.

Step 1

Set the frame into the opening and center it. In most cases, the raw opening is approximately 2” wider than the actual door size.

Step 2

Carefully level the frame and check that it fits correctly at the bottom. Starts a couple of 4D finish nails in the top frame piece. Use a level to make sure it is perfectly level.

Step 3

Place wood shims between the doorframe and opening. Wood shims are available at building supply stores such as City Mill, or you can use cedar shingles.

Step 4

Push the shims together until they are snug in the space and drive 8D or 10D finish nails through the doorframe, shims and into framing lumber of the opening. Use a pair of shims on a nail approximately every 16”. It is important that you do not drive the nails all the way in so adjustments can be made.

Step 5

Level the hinge side of the frame and secure it with three nails. One at the top, one at the bottom and one in the center. Use shims as before and do not nail all the way in.

Step 6

Mount the door to hinges on frame and close it to test to fit. The door should close easily and there should be an even seam all around the door. If the kit is not correct, re-check all sides with a level and adjust.

Step 7

Once the fit is right you can put on your decorative casings and moulding.