Which of the following is not a common residential insulation material?

The correct choice is the material that is not commonly used for residential insulation. Cellulose fiber, mineral wool, and polystyrene are widely recognized and utilized for their insulating properties in home construction.

Cellulose fiber is often made from recycled paper products and is valued for its eco-friendliness and effective thermal performance. Mineral wool, also known as rock wool, provides excellent fire resistance and soundproofing capabilities, making it a popular choice for both thermal insulation and acoustics.

Polystyrene is another insulation material that comes in two forms: expanded polystyrene (EPS) and extruded polystyrene (XPS), both of which are used in various applications for their thermal resistance.

In contrast, polyvinyl chloride (PVC) is primarily a plastic material used for plumbing pipes, electrical wiring insulation, and various construction products, but it is not recognized as a common or effective residential insulation material. Its primary characteristics do not lend themselves to thermal resistance, which is crucial for insulation purposes.