KNAUF R-13 EcoBatt Kraft Unfaced Fiberglass Insulation Batt delivers reliable thermal performance for standard wall cavities and framed construction. With an R-value of 13, this 3-1/2-inch batt provides effective heat transfer resistance in 16-inch on-center stud layouts. The kraft facing acts as a vapor retarder, making it suitable for interior applications. Each batt covers 128 square feet, reducing installation time on job sites. EcoBatt formulation minimizes airborne particles during handling. Ideal for residential walls, this product meets building code requirements and integrates seamlessly into standard framing schedules.