The whole wall from floor to ceiling is insulated with it except for a window, door, studs, electrical boxes and a couple wires. I can't remember if it was a 2x6 wall or a 2x4 wall. I thought about a hot foam wire but not sure if we got one at work. Turns out my boss came by, saw the insulation, and decided we didn't have to worry about the insulation. Wall is coming out anyways.