After the attic has been air-sealed to minimize air leaks, it usually takes a day or less to complete an attic insulation upgrade using blown-in TruSoft cellulose. Our blown cellulose is a surprisingly affordable, super-green loose-fill insulation treated for resistance to fire, insects and mold. Air-sealing the attic, combined with an insulation upgrade, cut this home's heating and cooling costs by up to 40%, in addition to solving the ice dam and roof leak issues.