QQ Step Soft™ is a recycled rubber sound-deadening mat used directly under tile, engineered wood and traditional hardwood. The rubber material provides a resilient layer within the flooring assembly for reducing vibration noise. It comes in different thicknesses from 1mm to 15mm. The recycled rubber mat is an excellent way to earn LEED credits and limit noise from high frequencies.
http://www.keenebuilding.com/qq-step-soft.aspx
Keene Building Products Inc.
KEENE BUILDING PRODUCTSâ„¢ is the manufacturer, distributor & marketer of 3-dimensional products for moisture & noise control. In six short years Keene has succeeded in producing & marketing first class products.