A universal underlayment engineered for maximum performance under engineered wood and laminate flooring. Composed of at least 90\% pre-consumer recycled fibers, Versa Walk installs under nail-down, glue-down, and floated flooring. Versa Walk can smooth out minor subfloor imperfections while quieting impact sound and floor to ceiling noise. In addition, it dampens ambient sound in the room and helps minimize impact and airborne sound from traveling into the room below. It contains an antimicrobial additive that retards mold growth and adds an insulating R-Value of 0.65 to the floor system. Roll size: 36" W x 33.3' L x 0.11" T (100 sq ft roll).