Cat shelves are a great way to provide your kitty with a fun activity area without taking away any floor space from your home. Your cat literally can climb the walls for exercise, or to get away from children or other pets.
Place one of your shelves on the floor, or another flat surface, so that the shelf is standing on its long edge.
Measure 4 inches from the left edge and line a shelf bracket up with the shelf so that it looks like you are going to install the shelf on the floor. Screw the bracket to the bottom on the shelf. Install the right side bracket the same way.
Measure and cut a piece of carpet to the size of the self. Glue the carpet to the top of the shelf using an ample amount of hot glue.
Locate studs in the wall by knocking with your finger on the wall or using a stud finder. Where there is no stud the wall will have a hollow sound, while where there is a stud the wall will feel and sound solid. Mark the stud with a small pencil mark.
Hold the shelf, with the brackets installed underneath, against the wall where you want to hang it. Make sure one of the brackets is on a stud. Since studs are placed 16 inches apart, the second bracket should line up with the next stud. Make sure the shelf is straight using a level and mark the screw holes with the pencil.
Line the shelf up with the pencil marks and screw the brackets into the wall.
Repeat the process in a staggered pattern up the wall or around the room. Keep shelves within 2-1/2 feet of each other.