I've been using "Quiet Rock" as an added or substitute layer on some recent projects. David DAVID BERGMAN ARCHITECT / FIRE & WATER LIGHTING + FURNITURE architecture . interiors . ecodesign . lighting . furniture bergman at cyberg.com www.cyberg.com 241 Eldridge Street #3R, New York, NY 10002 t 212 475 3106 f 212 677 7291