How To Measure Interior Door Size For Replacement

How to Measure Interior Door Size for Replacement

Replacing an interior door can be a simple DIY project that enhances the look and feel of your home. However, getting the correct door size is crucial for a seamless installation. Accurate measurements ensure the new door fits properly and avoids costly mistakes. This article will guide you through the steps involved in measuring your existing interior door for replacement.

Step 1: Gather the Necessary Tools

Before starting the measuring process, gather the following tools to ensure accurate and efficient measurements:

Measuring tape: Choose a tape measure that is at least 12 feet long and has clear markings.
Pencil or pen: For marking down measurements.
Notepad: To record all measurements for future reference.
Level: Verify that the door frame is plumb and square.

Step 2: Prepare the Door and Frame

To obtain accurate measurements, it is important to carefully prepare the door and frame:

Remove the door from its hinges.
Remove the doorstop from the door frame.
Inspect the door frame for any damage or warping.

Step 3: Measuring the Door Opening

The door opening is the area where the door sits within the frame. Accurately measuring the door opening is critical for selecting the correct door size.

Measure the width: Place the measuring tape at the top of the door opening, ensuring it is level. Measure the width of the opening at three different points: top, middle, and bottom. Record the narrowest measurement.
Measure the height: Place the measuring tape at the side of the door opening, ensuring it is level. Measure the height of the opening at three different points: left, middle, and right. Record the shortest measurement.
Measure the depth: This measurement is not always necessary, but it will be helpful if you are replacing a solid core door with a hollow core door. Measure the thickness of the door frame from the front to the back.

Step 4: Measuring the Door

Next, measure the existing door to determine its dimensions. These measurements will help confirm the door opening size and ensure you choose a door that fits the frame.

Measure the width: Measure the width of the door at three different points: top, middle, and bottom. Record the shortest measurement.
Measure the height: Measure the height of the door at three different points: left, middle, and right. Record the shortest measurement.

Step 5: Determine the Door Size

After measuring the door opening and existing door, you are ready to determine the size of the replacement door. Here are a few things to keep in mind:

Door sizes are typically measured in inches. Measurements often include fractions of an inch to account for slight variations in door openings.
When selecting a replacement door, consider the following:
- The new door should be slightly smaller than the door opening, allowing for a snug fit.
- The door should be the same width as the existing door, unless you plan to modify the frame.
- The door should be the same height as the existing door, unless you plan to shorten the frame.

Step 6: Account for Door Thickness

Interior doors come in standard thickness sizes. Measure the existing door thickness to ensure you choose the right replacement door. Common door thicknesses include:

1 ¾ inches
1 ¾ inches with a ¼ inch pre-hung jamb (total thickness of 2 inches)

Step 7: Consider the Door Style and Material

When choosing a replacement interior door, consider the existing style, material, and finish.

Style: Popular interior door styles include flush doors, French doors, and paneled doors.
Material: Common interior door materials are wood, fiberglass, and composite materials.
Finish: Choose a door finish that complements the existing trim and style of your home.