Abstract: Accordingly, there is provided a method of manufacturing continuous strand fiberglass of progressive density with varying skins having steps of melting glass media into molten glass within a temperature controlled melter, molten glass exits melter through orifices of a bushing plate, of varying orifice row configurations, orienting the bushing plate 6 degrees relative to the axis of the drum. Rollers spread fibers, a temperature control system controlling reservoir binder temperature, and water spray nozzles control fiberglass moisture. A rotating drum, circumferentially and longitudinally superior in size has a substantial and sustainable control of the rotation of the drum. In another aspect, a method of forming a fiberglass mat, having the steps of feeding a fiberglass media between bowed rollers of providing for a differential pressure across the mat reducing weight variation with controllers integrally controlled by a computer machine.