Where can loose-fill insulation, such as vermiculite or perlite, sometimes be found?

Loose-fill insulation, specifically materials like vermiculite or perlite, is commonly utilized for insulating purposes due to their lightweight and effective thermal properties. One of the notable applications of these materials is in external masonry unit walls. These materials can help create a comfortable indoor environment by reducing heat transfer, thereby maintaining more stable temperatures within buildings. Within the masonry walls, they are typically used to fill cavities and enhance insulation performance.

Vermiculite and perlite can sometimes also be found in other construction applications, but in the context of external masonry unit walls, they provide additional benefits such as fire resistance and moisture control, which are crucial for maintaining the integrity and durability of the wall systems.