What is unfaced insulation?

Unfaced insulation refers to insulation that does not have a facing or barrier material attached to it. This type of insulation is typically made of fiberglass, mineral wool, or cellulose and is used primarily for insulating walls, ceilings, and attics. Unfaced insulation is often preferred for its versatility and flexibility, as it can be easily cut and shaped to fit into different spaces. It is also a cost-effective option for those on a tight budget as it is less expensive than faced insulation. However, unfaced insulation does not provide a vapor barrier or air barrier, which may be necessary in some applications. Therefore, the use of a separate vapor barrier or air barrier may be required to ensure optimal performance.