Sound proofing system and method

A soundproofing structure for interior walls, floors or ceilings of rooms in new and/or existing construction, comprising:

• a contiguous, sound absorbing layer and structural layer adhesively joined about substantially coextensive confronting major faces of said sound absorbing layer and said structural layer, said sound absorbing layer comprised of an asphalt based flexible membrane having opposing faces, at least one of said opposing faces of said asphalt based flexible membrane being self-adhesive, and wherein said structural layer is comprised of sheet like material having opposing major faces, and wherein one of the opposing major surfaces of said structural layer is substantially coextensive with and adhesively joined to said at least one self adhesive major face of said asphalt based flexible membrane.