Stress-skin insulated buildings are vastly more energy efficient, stronger, quieter, and more draft free than other building systems, such as stud framing with fiberglass insulation. Fiberglass is sometimes used for furnace filters because air moves through so freely. Rigid insulation is used as solid component insulation in almost every industry for its inherent efficiency and lack of air movement. These attributes are built right into a stress-skin paneled building. Less air leakage means fewer drafts, less noise, lower energy bills, and a much more comfortable indoor environment.