With an impressive R-value of 49, Knauf R49 KFB provides superior thermal performance for attics, ceilings, and floors. This makes it energy-efficient and cost-effective, allowing you to save on your energy bills. In addition, its high-density fiberglass construction offers improved sound control, making your home quieter and more comfortable. With Knauf R49 KFB, you can enjoy a well-insulated and peaceful living space, all while reducing your carbon footprint.