How to Install a Prehung Exterior Door Part 2 How to Install a Prehung Exterior Door Part 2
Once you have competed fitting your prehung exterior door to the frame of your wall, you will need to finish the installation. Before doing so, ensure that it fits well into the door frame, and that the hinges are facing the correct way. Installing a prehung door on the exterior of your home should not be too difficult, as you have the frame already in place. Finishing the installation should not take much longer than fitting the door into the wall. (This is Part 2 of 2. To return to Part 1, click here.)
Step 1 - Nail around the Molding
When you have fitted the frame into the wall, you should be ready to nail around the molding of the door. Before you add any nails to the frame, you will need to hammer in some shims to keep it in place. All of the shims should be installed on the hinge side of your frame. Wiggle the assembly about until the shims are holding the door frame accurately and in a good position. Then, take your screws, and screw each one tightly in place. You may need to install all of the screws and then go back and tighten the positions later to ensure that they fit correctly. Nail around the molding that the frame includes, taking care to properly secure the door to the wall in each area.
Step 2 - Install Drip Edge
In order to ensure that your door does not attract moisture, you will need to fit a drip edge to the top of the door. This is usually a simple triangle of wood or metal that is fitted into the very edge of the frame. This drip edge should be placed between the siding of the door and the building paper that is hanging from the door. In order to get the best from your drip edge, place it with the point at the bottom of the edge. This will ensure that water slides down rather than collecting in a pool at the top of the door.
Step 3 - Finishing
Once you have installed the door, you will need to add some finishing touches to be certain that it lasts for a long while. Keep the door open while you perform these tasks to ensure that you don't accidentally seal yourself out of your own home. The first step is to caulk all of the edges that you have cut or drilled, including the entire wall edge. Use an exterior caulk to keep the water from penetrating to the inside. You should then varnish the door and leave both caulk and the varnish to dry before you attempt to paint the door and frame.