Glass wool, generally known as fiberglass insulation, is produced from recycled glass and sand melted at substantial temperatures and spun into high-quality fibers. You can put in batts in two levels across an unfinished attic flooring, perpendicular to each other, for increased effectiveness at blocking heat bridging. Blankets can go https://glasswool37048.izrablog.com/36720941/air-conditioning-insulation-material-an-overview