Insulation and soundproofing
Insulating Attics in Old Homes - Energy Efficiency Renovations
...insulation batts to fiberglass or mineral wool
Batt insulation is often less effective than blown insulation, but it is still a viable method, we just recommend being very diligent if that's the route you're going. Some other natural materials we can name are sheep's wool batt insulation, hemp batt insulation, and a ra...