A door shoe is a simple device attached to the bottom of a door. It's effective at sealing the gap at the bottom of the door to prevent heat loss. Below are the materials that you need along with the instructions on how to replace a door shoe.
Mark the Door
Open the door and set the door shoe at the lower portion of the door. Close the door slightly until the door and the door shoe press against each other. Using a pencil, mark the position of the door show. Trace a line to each end of the door shoe. This mark will also serve as your trimming guide.
Remove the Door
Using a screwdriver, remove the door from its hinges. Lay the door on your working bench with the marks you made on step one on the upside.
Using a circular saw with a crosscut blade, cut the lower portion of the door using the guideline you made on step one. Smooth the edges of the newly cut door portion using sandpaper to remove wood splinters.
Attach the Door Shoe
Attach the door shoe to the lower portion of the door and secure the door shoe with screws. Re-install the door and secure the hinges with screws.
Test the Door
Open and close the door and check if there are no gaps between the door shoe and the bottom portion of the door. Do any adjustments by repeating steps one to four.