How to Install a Prehung Exterior Door This Old House
Installing a prehung exterior door can be a daunting task, especially for those who are new to home improvement projects. However, with the right tools and a step-by-step guide, you can successfully replace your old door with a new prehung exterior door. This Old House provides a comprehensive guide to help you through the process, ensuring a seamless and professional-looking installation.
Step 1: Preparing the Door Opening
Before installing the new prehung exterior door, it is crucial to prepare the door opening. Begin by removing the old door and its frame. Be sure to disconnect any hardware or locks that may be attached. Next, check the door opening for any damage or unevenness. Use a level to ensure the opening is square and plumb. If necessary, make any necessary repairs or adjustments to the framing.
Step 2: Measuring and Cutting the Door Jambs
Once the door opening is prepared, measure the door jambs to ensure the new prehung door will fit properly. The jambs are the vertical and horizontal pieces of wood that hold the door in place. Use a saw to cut the jambs to the correct height and width. Be sure to leave a slight overhang on the jambs to accommodate the door’s threshold.
Step 3: Installing the Door Jambs
With the jambs cut to size, it’s time to install them in the door opening. Begin by placing the top jamb in position, ensuring it is level and plumb. Secure the top jamb to the header using screws. Next, install the side jambs, making sure they are also level and plumb. Secure the side jambs to the door frame using screws.
Step 4: Installing the Door
With the jambs securely in place, it’s time to install the door. Place the prehung door in the opening and align it with the jambs. Ensure the door is level and plumb, and then secure it to the jambs using screws. Be sure to check the door’s alignment before fully securing it.
Step 5: Installing the Door Hardware
Once the door is installed, it’s time to add the hardware. This includes hinges, door knob, and lockset. Follow the manufacturer’s instructions for installing the hardware. Ensure that the hinges are properly aligned and that the door opens and closes smoothly.
Step 6: Finishing Touches
After the door and hardware are installed, it’s time to make any finishing touches. Caulk around the door frame to seal any gaps and prevent air and water infiltration. Apply weather stripping to the bottom of the door to provide additional insulation and weatherproofing.
In conclusion, installing a prehung exterior door can be a challenging but rewarding project. By following these steps and taking your time, you can successfully replace your old door with a new prehung exterior door. This Old House’s guide will help you through the process, ensuring a professional-looking installation and a more secure and energy-efficient home.
