How to install interior double doors

Updated February 21, 2017

There are things you can include in a room remodel that can add extra value to your home. A great way to add some elegance to a room you are remodelling is to install a set of double doors. You don't have to hire a specialist to install them. This project is something that you can do on your own with a few tools.

Measure to make sure you have enough space for your new double door frame. The space for the new doors should be one inch wider and 1.2 cm (1/2 inch) taller than the frame. Also make sure the new door jamb is the correct size. Door jambs come in a width of 11.3 cm or 16.3 cm (9/16 inches or 6 9/16 inches).

Place your new door frame in the wall. Slide it into place bottom-first, and then tilt it up until it is in the correct upright position. Make sure the jambs are flush with the wall.

Use your level to make sure the top of the door frame is level. When you get it in place, hammer it in securely using the 3.8 cm (1 1/2 inch) nails. Place the nails about every 15 cm (6 inches) or so apart as you go along the top of the door frame.

Hold the level on one side of the frame. Hammer in wood shims between the wall and the frame until the side of the frame is level. Once you have aligned it, drive the 6.5 cm (2 1/2 inch) nails through the frame, shims and partially into the wall stud to secure. Do this at both hinge locations and in the centre of the frame. Repeat on the other side.

Operate the doors and make sure they can shut, stay closed, are level and have a 3 mm (1/8 inch) gap between them and the door frame. If they don't, pull out the 6.5 cm (2 1/2 inch) nails in the frame and adjust. Once they have achieved all of these criteria, drive the nails all the way into the side of the frame.

When the frame is in place, add shims at every 30 cm (12 inches) down each side of the frame. Cut the wall shims so they are even with the wall.


Take the door off the frame before you install it, as this may make it easier to hang the door.


Make sure the frame and doors are level before you secure them to the wall. If they're not, you may have to demolish the door frame to get them out, which will require you to get a new frame.

Things You'll Need

  • Goggles
  • Hammer
  • Hand saw
  • Level
  • Nail set
  • Pencil
  • Utility knife
  • Pre-hung double door frame with doors
  • Measuring tape
  • 3.8 cm (1 1/2 inch) finishing nails
  • 6.5 cm (2 1/2 inch) finishing nails
  • Wood shims
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About the Author

R.L. Cultrona is a San Diego native and a graduate of San Diego State University. She holds a Bachelor of Arts in theater, television and film with a minor in communications and political science. She began writing online instructional articles in June 2009.