How to Install an Interior Door: A Step-by-Step Guide

Tools and Materials Needed

Tools

• Measuring tape
• Level
• Screwdriver (flathead and Phillips)
• Drill and drill bits
• Hammer
• Utility knife
• Safety glasses
• Work gloves
• Chisel (optional)

Materials

• Interior door kit (including door, frame, hinges, handle, and hardware)
• Shims
• Wood screws
• Doorstop (if not included)
• Caulk and caulking gun (optional)
• Paint or stain (if needed)

Step-by-Step Installation Guide

Step 1: Measure the Doorway

1. Measure the Door Frame: Use a measuring tape to determine the width and height of the existing door frame. Measure at the top, middle, and bottom for width, and at the left, middle, and right for height. This ensures an accurate size for your new door.
2. Choose the Right Size Door: Based on your measurements, select an interior door that fits your frame. Most doors can be trimmed to fit, but selecting the correct size will save time and effort.

Step 2: Prepare the Door Frame

1. Remove the Existing Door: If replacing an existing door, unscrew the hinges and carefully remove the door.
2. Clean and Inspect the Frame: Remove any old caulk, nails, or debris from the door frame. Check the frame for any damage or warping that may need repair before installing the new door.

Step 3: Install the Door Frame

1. Assemble the Frame: Follow the manufacturer’s instructions to assemble the door frame. Ensure all parts fit together snugly.
2. Position the Frame: Place the assembled frame into the door opening. Use shims to adjust the frame so it is level and plumb.
3. Secure the Frame: Once the frame is properly positioned, use a drill and wood screws to attach it to the door frame. Ensure it is tightly secured and that there are no gaps.

Step 4: Hang the Interior Door

1. Attach the Hinges: Position the door in the frame and align the hinges with the pre-drilled holes on the door. Use a chisel to deepen the hinge mortises if necessary.
2. Secure the Door: Screw the hinges into place, ensuring the door swings freely and does not rub against the frame.
3. Check Alignment: Close the door and check its alignment. Adjust the hinges or shims as needed to ensure a perfect fit.

Step 5: Install the Handle and Latch

1. Attach the Handle: Follow the manufacturer’s instructions to install the handle and latch mechanism. Ensure the handle operates smoothly.
2. Install the Strike Plate: Align the strike plate with the latch and secure it to the door frame. Make any necessary adjustments to ensure proper operation.

Step 6: Final Adjustments and Finishing Touches

1. Check for Smooth Operation: Open and close the door several times to check for smooth operation. Make minor adjustments to hinges or latch as needed.
2. Seal and Finish: Apply caulk around the door frame if there are any gaps. Paint or stain the door as desired to match your home’s decor.

Step 7: Final Checks

1. Inspect for Gaps: Look for any visible gaps between the door and frame. Use additional shims or caulk to seal any areas as needed.
2. Test the Door: Test the door to ensure it closes securely and operates smoothly without sticking.