Underlayment for surface coverings and methods of making the same

摘要

An underlayment for surface covering, such as flooring, is described wherein the underlayment includes at least one polymeric foam layer having a top surface and a bottom surface and at least one felt layer located on either the top surface or bottom surface of the polymeric foam layer. Methods to reduce or control sound transmission and/or sound reflection of surface coverings like flooring products is also described wherein the underlayment is installed beneath the surface covering.