You will need a long level or a laser level for that much wall to keep it straight/level. Depending on your electrical outlets and whether or not you will need to add any adapters or extension cords, be sure to cut out a large enough space in the panels to accomodate a couple of inches around the outlet cover or leave a gap between panels when there is an outlet. My ceiling is about 10 feet, so I used seven panels from top to bottom (one foot in height each), leaving room at the top and bottom as suggested in the instructions. I have two windows on one side and three of the sides also have insets/setbacks so none of the walls are straight across. This is where the shorter panels and even some single hanging tracks were used. The long panels are bit heavy when you are installing them high up and you might need someone to help hold one on occasion, particularly the first one when you are leveling and adjusting to the right position before screwing it in.