Insulation costs between $1,400 and $6,300. Blown-in insulation costs a little less than batting, fiberglass and radiant barrier insulation, at $2,900 on average. Spray foam insulation is the most expensive option but has the highest ROI. You’ll spend between $0.25 and $2 for every Perfect Steerable Transfer Carth of thickness per square foot (one board foot) or $1 to