Lightweight, wood-free structural insulation sheathing

A structural insulation sheathing (SIS), said structural insulation sheathing (SIS) providing a structural strength for a building wall equivalent to OSB or plywood without need for using OSB, plywood or metal rods, said structural insulation sheathing (SIS) comprising:

• a rigid or semi-rigid first upper facial member, a rigid or semi-rigid second lower facial member, said first upper and second lower structural members being equally spaced from each other, and a central insulation member in intimate, planar contact with the first upper and second lower facial members, wherein the first and second facial members are made from a reinforcing fiber material less than 3/16 inch thick, said reinforcing fiber material being selected from the group consisting of:
• ceramic, glass, hemp, carbon, mineral wool, and a polymer, and the central insulation member comprises a foam layer selected from the group consisting of an EPS (expanded polystyrene), a GPS (graphite polystyrene), a polyisocyanurate and a polyurethane, said structural insulation sheathing having at least 10 times the strength of its individual components, i.e., the first upper facial member, the second lower facial member and the central insulation member if not combined to form the structural insulation sheathing (SIS).