How To Measure Rough Opening For Interior Doors

Essential Aspects of Measuring Rough Opening for Interior Doors

Replacing or installing interior doors requires accurate measurements to ensure a proper fit. Measuring the rough opening for an interior door is a crucial step that determines the door size and ensures a smooth installation process.

What is a Rough Opening?

A rough opening is the opening in a wall where the door frame and door will be installed. It includes the opening for the door swing, as well as the header above and the jambs on the sides.

Tools Required

To measure a rough opening for interior doors, you will need the following tools:

Measuring tape
Level (optional)
Framing square (optional)

Step 1: Determine the Door Swing

Identify the direction in which the door will swing. This will affect the location of the hinges and the direction of the jambs.

Step 2: Measure the Width

Use the measuring tape to determine the width of the rough opening from the inside edge of one jamb to the inside edge of the opposite jamb. For a standard door, the width is typically around 36 inches.

Step 3: Measure the Height

Measure the height of the rough opening from the top of the header to the finished floor. Include any threshold or sill that will be installed.

Step 4: Measure the Depth

Measure the depth of the rough opening, also known as the "jamb depth." This is the distance from the inside face of the jamb to the inside face of the framing.

Step 5: Verify Squareness (Optional)

To ensure the rough opening is square, use a framing square or level to check the perpendicularity of the jambs and the header. This will help prevent any issues with the door fitting properly.

Additional Considerations

Allow for a small gap between the door and the jambs for proper operation (typically 1/8 inch).
Consider the type of door stop or casing that will be used and account for its thickness.
Check the rough opening for any obstructions, such as electrical wires or plumbing pipes, that may need to be moved.

By following these steps and considering the additional factors, you can accurately measure rough openings for interior doors, ensuring a successful installation and a well-fitting door that enhances the functionality and aesthetics of your home.