Cut or purchase a new frame. If replacing just one part of the frame, cut a piece of timber of your choosing to size.
· Weather-treated pieces of 2x4 timber are the most commonly used type of wood used for door frames. These are available in several standard sizes at DIY stores such as Lowes.
· Never use pressure-treated materials as they will twist once they dry out.
· The most common heights for doors are 80”, 84”, and 96” in height. The width of common doors range from 18” to 36” wide.
· Ask an expert at a hardware store if you have any questions specific to your project. They can help you choose and cut any parts you will need for the repair.
Modify the top plate if necessary. The top plate may need a modified notch for fitting the placement of the new frame. Set the frame where it will be placed and mark the measurement for the notch in the top plate using a pencil. Cut the notch using a multitool and chisel.
· A multitool is an electric tool that comes with a variety of heads that fulfill different tasks, ranging from cutting and sanding wood to drilling holes.