How to Install Prehung Interior Doors: A Step-by-Step Guide
Installing prehung interior doors can be a straightforward and rewarding DIY project. These doors come fully assembled with hinges and doorjambs, making the installation process much simpler than hanging a door from scratch. Whether you’re replacing an old door or adding a new one to your home, following these step-by-step instructions will help you install your prehung interior door with ease.
Step 1: Prepare the Opening
Before you begin, ensure that the door opening is level, square, and free of any obstructions. Measure the width and height of the opening to confirm that it matches the size of the prehung door you have purchased. If necessary, trim the jambs to fit the door opening.
1. Remove the existing door and doorjamb if you’re replacing an old door.
2. Clean the door opening to remove any debris or old adhesive.
3. Check the opening for levelness and squareness using a level and a square.
Step 2: Install the Doorjambs
The doorjambs are the vertical and horizontal pieces that hold the door in place. They should be installed before hanging the door.
1. Place the doorjamb in the opening and mark the locations for the hinge screws.
2. Use a drill to create pilot holes for the hinge screws.
3. Attach the doorjamb to the framing using the hinge screws.
4. Repeat this process for the top and bottom doorjambs.
Step 3: Install the Door
Now that the jambs are in place, it’s time to hang the door.
1. Place the door in the opening and align it with the doorjambs.
2. Attach the door to the jambs using the hinge screws.
3. Adjust the door to ensure it is level and square. Use shims if necessary to make adjustments.
4. Tighten the hinge screws securely, but be careful not to overtighten them.
Step 4: Adjust the Door
After hanging the door, it’s important to adjust it for proper operation.
1. Check the door for proper alignment with the doorjambs. It should have a 1/8-inch gap at the top, bottom, and sides.
2. Adjust the hinges if necessary to correct any misalignments.
3. Make sure the door swings smoothly and closes properly.
Step 5: Finish the Installation
Once the door is installed and adjusted, you can finish the installation by adding door molding and door stops.
1. Measure and cut the door molding to fit the opening.
2. Attach the molding to the doorjambs using finishing nails.
3. Install door stops to prevent the door from swinging too far open.
Congratulations! You’ve successfully installed a prehung interior door. With a bit of patience and attention to detail, you can enjoy the new look and functionality of your door.
