An apparatus, method and system of insulating a building such as a poultrybarn usesnetting structurally of the type to hold sod together. The netting is stapledto the bottom oftrusses making up the ceiling of a barn and the attic of the barn. Ceilingmaterial issuperimposed below the netting to form a ceiling. Loose insulation, typicallyfiberglass, isblown onto the netting to be held thereby and to form an insulation layer inthe attic of the barn.