Patent ID: 7886488
Filing Date: 2011-02-15
Classification: E04F

Abstract:
1. An acoustic isolation medium configured for placement between a subfloor and a finished floor, comprising: a first layer being a polymeric sound reduction mat disposed directly upon the subfloor, said sound reduction mat including a plurality of generally parallel, hollow cylinders, each of said cylinders including an upper end and a lower end, said lower end of each of said cylinders directly contacting the subfloor; a second layer placed upon said upper end of each of said cylinders of said first layer and being one of a sheet of fibrous material and a web of limp mass material wherein said limp mass material is selected from the group consisting of sound reduction board and cementitious board, each board having a density of approximately 22-72 pcf; and a third layer placed upon said second layer and being the other of a sheet of the fibrous material and a web of the limp mass material, wherein a poured underlayment is placed upon said third layer, the isolation medium being disposed between the poured underlayment and the subfloor, wherein the finished floor is placed on the poured underlayment.