Our 17mm (11/16″) REGUPOL sonus curve 17 underlayment is engineered, manufactured, and tested to reduce the transmission of impact sound generated by footfall noise. Durable, versatile, and cost-effective are the main characteristics to describe this dimpled flooring underlayment. Various thicknesses let you design many different floor constructions to reduce impact and airborne sound transmission within building structures. REGUPOL sonus curve is perfectly suited for commercial and residential buildings underneath hardwood, concrete, screed, and flooring floor systems.