Our Sound Silent 7 acoustical underlayment has been specially developed for the improvement of sound impact. The SS7 is the perfect underlayment for new construction, remodeling and multi-family development. Our Sound Silent 7 is ideal for installation beneath tile, stone or parquet and can be installed on screed, concrete or wooden subflooring.Their high compressive strength enables the application under working loads of up to 73.1 lb/ft².