CertainTeed CertaPro® Commercial Batts are designed to enhance acoustical and thermal performance in exterior and interior walls, and improve sound transmission loss over suspended ceilings. They are available unfaced or in multiple facings. This product improves acoustical properties in partition or exterior walls, contributing to a quieter interior environment. It also provides excellent thermal performance, thus saving energy. The lightweight product is easy to cut and install and will not settle. The product resists mold and mildew and will not rot or deteriorate.