To install wallpaper on your ceiling, remove existing paint and ceiling fixtures, measure the ceiling's dimensions, cut the wallpaper to size, and apply wallpaper paste on the wallpaper. Affix the wallpaper on the ceiling portion by portion, squeeze out bubbles, and press the edges down. Finally, cut holes for the fixtures, and replace them.
To remove the existing paint on the ceiling, identify the flaky portions, and scrape them off using a razor blade. Sand the ceiling with sandpaper to make the surface even. Cut off power supply to the room, and take out the light fixtures on the ceiling. Cover the fixture holes with masking tape.
Measure the ceiling's width and length, and use the measurements to cut the wallpaper, leaving an additional 1 or 2 inches at the edges. Prepare the wallpaper paste according to its instructions, and apply it on about 18 inches of the wallpaper. If the wallpaper is pre-pasted, soak it in water according to its directions.
Climb a ladder, and affix the wallpaper starting from one corner of the ceiling about 1 or 2 inches from the wall. To make the paper lie flat against the ceiling, press it firmly using a squeegee or a brush. Ensure that the patterns on adjacent papers match.
Affix wallpaper over the whole ceiling in this manner, and press down the edges using a rolling pin or a paint roller. With scissors or a razor blade, cut the holes of the light fixtures, leaving an extra inch within the hole. Push the extra wallpaper into the holes, replace the fixtures, and restore power.