Summarize the following:
Some of these methods require special equipment. They should help you to purchase enough to cover the shed. They will require your stud spacing measurements as well. Set the polystyrene against the frame. Staple it into the studs. You will need to glue polystyrene sheets onto the walls and studs with a special adhesive. Continue moving up the wall in horizontal sheets. You can cut the insulation sheets with scissors to make a smaller section. You will need to leave at least a two-inch gap between the top of the ceiling and the insulation to let moisture escape. You will want to hang the sheets on the ceiling first, followed by wall sheets.

Summary:
Hire a professional contractor if you choose blown-in in or foam insulation. Take your shed measurements into the home improvement store. Roll the sheets of batting or foil out horizontally. Attach batting or with a staple gun if you are using foil sheets or batting. Overlap sheets of insulation where they meet. Insulate the ceiling as well as the walls. Cover the insulation sheets with sheets of drywall if you want the shed interior to be attractive.