How To Hang A Prehung Interior Door Split Jamb

How to Hang a Prehung Interior Door - Split Jamb Method

### Introduction: Replacing an interior door with a prehung door is a relatively simple home improvement project that can be completed in a few hours. A prehung door comes with the door, frame, and hinges already assembled, making the installation process much easier. In this article, we'll provide a step-by-step guide on how to hang a prehung interior door using the split jamb method. ### Tools and Materials: - Prehung interior door - Level - Measuring tape - Utility knife - Pencil - Hammer - Pry bar - Screwdriver - Drill - Safety goggles - Gloves ### Step 1: Measure the Doorway: Begin by measuring the doorway opening. Measure the width at the top, middle, and bottom, and record the smallest measurement. Also, measure the height from the top of the floor to the underside of the header. ### Step 2: Prepare the Doorway: If you're replacing an existing door, remove the old door and frame. Use a pry bar to remove the trim and casing around the door frame. Then, use a hammer to carefully remove the door frame. Make sure to wear safety goggles and gloves during this process. If you're installing a new door in a new wall, you'll need to frame the doorway. Follow the local building codes and manufacturer's instructions to properly frame the doorway. ### Step 3: Prepare the Split Jamb: The split jamb is a pre-assembled frame that consists of two jambs and a header. Separate the jambs by carefully prying them apart. Make sure to remove the packaging and nails that secure the jambs together. ### Step 4: Position the Jambs: Place the jambs on either side of the doorway opening, ensuring that they are plumb and level. Use shims to level the jambs if necessary. Make sure that the jambs are flush with the finished wall surface. ### Step 5: Secure the Jambs: Once the jambs are in position, secure them to the wall using screws or nails. Start by securing the top of the jambs, followed by the sides. Make sure to countersink the screws or nails so that they are flush with the surface of the jamb. ### Step 6: Install the Header: Position the header piece across the top of the jambs and secure it in place using screws or nails. Make sure that the header is level and flush with the tops of the jambs. ### Step 7: Install the Door: Lift the door into the frame and align it with the hinges. Make sure that the door is level and plumb. Use shims to level the door if necessary. ### Step 8: Install the Hinges: Install the hinge plates on the door and frame according to the manufacturer's instructions. Secure the hinge plates using screws or nails. ### Step 9: Test the Door: Once the door is installed, test it to make sure that it opens and closes smoothly. Adjust the hinges if necessary to ensure smooth operation. ### Step 10: Install the Trim: Install the trim around the door frame to give it a finished look. You can use a variety of trim options, such as baseboards, casing, and crown molding. ### Conclusion: Hanging a prehung interior door using the split jamb method is a straightforward project that can be completed in a few hours. By following the steps outlined in this article, you can successfully install a new interior door in your home, adding both functionality and style to your living space.