What does mineral board predominantly consist of?

Mineral board is primarily known for its composition of mineral fibers, which give it properties suitable for various insulation and construction applications. The material is indeed predominantly made from felted mineral fiber, which contributes to its thermal and acoustic insulation properties. Additionally, some formulations of mineral board may incorporate cellular beads to enhance certain characteristics, such as moisture resistance or lightweight features.

Thus, identifying both felted mineral fiber and cellular beads as components of mineral board supports the choice of having either one as a correct response. This versatility in composition allows manufacturers to optimize the material for specific performance requirements in commercial building applications.