Abstract: Methods, systems, and apparatuses for providing insulation for a wall panel, an embodiment of an insulated wall panel including a weather barrier, an insulating layer adjacent to the weather barrier, a moisture barrier adjacent to the insulating layer, and structural layer adjacent to the moisture barrier, and possibly a second insulating layer adjacent to the structural layer. The insulated wall panel may also include a plurality of nails, each nail having a head embedded in the insulating wall panel adjacent to the structural layer. A nail gun including a barrel with a toothed end or an end with an adjacent having a flat outer side may propel the nail into the insulating wall panel.