Premium Underlayment smoothes out little sub floor imperfections while quieting impact sound and floor to ceiling noise. This recycled fiber underlayment dampens ambient sound in the room it's installed in, but it also inhibits sound from traveling into the room below. Premium Underlayment performs as well as similar products made of cork or rubber.
In addition to its sound deadening benefits of 71 IIC* (see specifications pdf), the absorbing action of the synthetic fibers together with the attached vapor barrier provides superior moisture protection that is backed by a Limited Lifetime warranty. Another benefit is the increase in R-value to help keep floors warm in the winter, and cool in the summer.
Premium Underlayment is a green product, constructed (over 95%) with postindustrial/pre-consumer fibers, materials that may otherwise have been land filled, and is proudly manufactured in the U.S.