There were multiple studies done in the 70’s and 80’s that show that loose-fill cellulose can be used in conjunction with PCM’s to increase R values upwards of 30%.

PCM’s have a thermal storage capacity that allows them to retain heat during the day and release it during the night.

One study found peak cooling load reductions of 35% to 40% in side by side air conditioned houses one with paraffin PCM cellulose and one without.