Patent ID: 7811663
Filing Date: 2010-10-12
Classification: B29C,B29D,B29K,B32B,E04C,E04D,Y10T

Abstract:
1. A prefabricated roofing system panel comprising: a cover board, the cover board comprising a high-density core layer that is a least predominantly of a polymer material; the core layer of the cover board having a density between 4 lbs/ft an insulation board, the insulation board comprising a low-density core layer that is at least predominantly of a polymer foam material; the foam core layer of the insulation board having a density less than 2.5 lbs/ft the bottom major surface of the core layer of the cover board being bonded to the top major surface of the foam core layer of the insulation board; and the bottom major surface of the core layer of the cover board and the top major surface of the foam core layer of the insulation board being substantially coextensive; wherein the polymer material of the core layer of the cover board and the foam core layer of the insulation board is a polyisocyanurate material.