Patent ID: 8046971

Claim:
A wall panel for pre-fabricated construction comprising a core, wherein the core comprises: (i) a first wooden frame having a central body portion with top, bottom and opposing side edges, said central body portion defining a plurality of hollow cavities therein, each of the plurality of hollow cavities being filled with a layer of expanded polystyrene; (ii) a second wooden frame opposing the first wooden frame having a central body portion with top, bottom and opposing side edges, said central body portion defining a plurality of hollow cavities therein, each of the plurality of hollow cavities being filled with a layer of expanded polystyrene, wherein the first and second wooden frames are positioned in a parallel spaced apart relation to each other whereby the first and second wooden frames do not overlap through an imaginary plane running between and parallel to both of the wooden frames, and wherein the first and second wooden frames define a plurality of grooves therein, said grooves extending through the central body portions of the first and second wooden frames; (iii) a plurality of ribs comprising rock wool positioned within the grooves defined by the first and second wooden frames; and (iv) at least one internal layer comprising rock wool sandwiched between the first wooden frame and the second wooden frame.