Shredded-styrene insulation is typically used in which application?

Shredded-styrene insulation is primarily utilized for filling masonry-block wall cavities. This application takes advantage of the material's properties, such as its lightweight nature and thermal insulation capabilities. The structure of masonry-block walls often creates voids that can be filled to enhance insulation performance, reduce air infiltration, and improve overall energy efficiency within a building.

When considering other uses, it's important to note that while shredded-styrene might have some soundproofing qualities or could theoretically be used in specific ceiling finishes, these applications are not its primary purpose. Additionally, materials specifically designed as vapor barriers tend to be more appropriate for that function, as they possess unique characteristics that prevent moisture movement, which shredded-styrene does not optimally provide. Thus, the correct application of shredded-styrene insulation is indeed in filling masonry-block wall cavities, as this aligns best with its intended use and benefits.