Some embodiments relate to a method for producing a rubber-containing asphalt composition. The method for producing the rubber-containing asphalt composition comprises obtaining a rubber component; obtaining an unoxidized asphalt; mixing the rubber component and the unoxidized asphalt to obtain an unoxidized asphalt composition; oxidizing the unoxidized asphalt composition to obtain an oxidized asphalt composition; and forming a roofing shingle from the oxidized asphalt composition.