Choose fabric that matches your decorating style. For example, if you're decorating with a French country theme, look for a fabric such as toile with a pastoral scene on it.
Take the door off its hinges. You need to remove the hinge pins. Do this by taking a medium-sized screwdriver and placing it under the bottom of the hinge pin. Tap on it lightly with a hammer until the pin moves; it will move up. Do this with all the door's hinge pins.
Take the pins out of the hinges, starting with the bottom hinge. Insert the end of a flat-head screwdriver under the top part of the pin and pound on the end of the screwdriver with an upward motion to loosen the pin from the hinge. These can be greasy, so have a paper towel waiting in case you need to touch the pins. Stand against the door as you remove the last pin to prevent it from falling.
Remove the door.
Lay the door on the floor. The side you want to decorate with fabric should be facing the ceiling.
Wash the door to remove any smudges or grime that might be on it. Allow it to dry.
Measure the door.
Mark the fabric so it matches the measurements of the door that you just took. Add about an extra 1 1/2 inches to the fabric on all sides. For example, if the door is 2 1/2-feet wide by 6-feet tall, add an extra inch to the measurement so you have 2-feet, 8-inches by 6-feet, 2-inches as your measurement.
Cut the fabric.
Add some fabric starch to a large, flat pan. Dip a paint roller into the starch.
Cover the door with the starch, using the paint roller.
Lay the fabric on the door carefully, making sure it lines up straight with all the edges of the door. An extra inch should hang over the edges.
Smooth the fabric, using a large sponge, so the fabric it adheres to the starch on the door and to ensure it has no wrinkles. Allow it to dry according to the instructions on the starch container.
Trim the extra fabric away once the starch is dry and hang the door back up.