Step 1

When ordering a pre-hung door, you will have the choice of a right- or left-hand swing, as well as having the manufacturer drill the holes in the door for the locksets. If the unit arrives with a brace to keep the door and frame aligned, leave the brace on until the door unit is plumbed, shimmed and secured into place.

Step 2

Trim excess drywall around doorway.

Trim Door Opening

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Trim Door Opening

Trim any excess drywall around the doorway to make sure the new door will hang plumb.

Step 3

Check floor for level.

Check That Floor is Level

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Check That Floor is Level

Mark for any shims that are needed under the level.

Step 4

Measure to determine shim placement.

Determine Where Shims Should Go

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Determine Location for Shims

Measure and mark against the jamb where any shims are needed.

Step 5

Cut the door as needed.

Cut Door

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Cut Door

Cut the door to the appropriate length.

Step 6

Prepare door for installation.

Remove Door's Temporary Packaging

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Remove Packing Material

Remove the plug that comes on the pre-hung door, as well as the temporary trim on the bottom of the door.

Step 7

Tack a shim to the doorway.

Begin Installation

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Attach Shim to Doorway

Tack one nail on a shim in the doorway to get started.

Step 8

Position the Door so it is Plumb

Position Door

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Position Door

Place the door inside the opening. Position the door so it is plumb, and the door is able to swing open.

Step 9

Secure the door jamb with nails.

Secure the Door Jamb

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Secure Jamb

Secure the jamb with nails along its length.

Step 10

Check and Adjust Door Opening

Use a straight edge to check the door opening, ensuring that it has room to open and close (Image 1).

With the door closed, place a shim by the bottom hinge to accommodate any adjustments (Image 2).

Step 11

Ensure that the door is level.

Check Door for Level

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Check Top Gap Above Door

Also, check the door again to make sure it is level.

Step 12

Check center shim and gap before nailing the door into place.

Nail Door in Place

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Nail Door in Place

Check the center shim and the gap to make sure the door is plumb. Nail the door in place, from the jambs through the shims.

Step 13

Fill holes with spackle after setting.

Set Nails

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Fill Nail Holes

Use a nail set to set the nails beneath the wood, creating a smooth finish. Fill the holes with spackle.

Step 14

Check Door for Proper Operation

Open and Shut the Door

2009 Dorling Kindersley Limited DK - Do It Yourself Home Improvement View original photo.

DK - Do It Yourself Home Improvement, 2009 Dorling Kindersley Limited

Open and Close Door

Check the door to make sure it opens and shuts properly.

Step 15

Make Adjustments

Place a level on the vertical surface to check that the door is plumb (Image 1).

If you need to adjust the door, try using a sledgehammer with a very gentle tap (Image 2).