Roberts 70-120 3-Feet x 250-Feet 30-Pound Waxed Paper Underlayment for Wood Floor Installation in 750 Square Feet Roll Convenient 3 ft. x 250 ft. roll for a total of 750 sq High quality 30-lb. heavy duty Kraft paper for professional performance Use between wood floors and subfloors to ease installation and minimize squeaks Helps ease the installation of nail-down wood floors by allowing boards to slide into place For above grade installations where moisture is not a concern