Now it was time to finish the inside. The first step was to run the wiring. We decided where we want the receptacles , lights and switches. Then I connected them with #12/2 with ground romex. Next was the insulation, 19-R recycled fiberglass in the walls, 6" Styrofoam (30-R) in the ceiling. The insulation was covered with plywood sheets then plastic or tar paper which acts as a moisture barrier.