With the back wall built into the hill with 4 inches of exterior foam insulation and the front wall mostly windows, the exposed side walls were the only ones that needed another source of insulation.

Three main types of blow-in cellulose insulation are used in residential application: loose fill, stabilized, and wall-cavity ...

Walls 35 Cavity wall insulation fills the cavity between the outside walls with mineral wool, polystyrene beads or foam. Trapped air between fibres, beads or within foam reduces heat loss by ...