NovaCork underlayment is a natural thermal & acoustic insulator that minimizes sound transmission from floor to ceiling on second floor applications and heat and cold transfer on ground floor applications. NovaCork is available in 6mm and 12mm thickness and is an excellent underlayment choice for a variety of floor coverings including, hardwood, marble, natural stone, ceramic or a floating floors. Nova Cork Underlayment is environmentally sound and is certified FSC.