What are common forms of insulation materials?

The common forms of insulation materials include loose fill, batts or blankets, rigid boards, and foamed in place. This designation accurately represents widely used types of insulation in building practices.

Loose fill insulation, made of materials like cellulose or fiberglass, is used to insulate irregular spaces and can be blown into cavities. Batts or blankets are large pieces of insulation that are typically made of fiberglass or mineral wool and are used in walls, ceilings, and floors. Rigid board insulation consists of high-performance materials that provide thermal resistance and structural support, making it suitable for exterior walls, roofs, and foundation applications. Foamed in place insulation is a method where liquid foam insulation is sprayed into place, expanding to fill gaps and providing a continuous air barrier.

Other options list materials that either do not primarily serve as insulation or do not represent common insulation forms effectively. For example, plywood and drywall are structural materials rather than insulation, while concrete blocks and metal sheets typically function as building materials rather than specifically as insulators. By focusing on the correct answer's components, one can see that it encapsulates the principal forms of insulation utilized in construction.