The invention provides a method of analyzing a building made from a core of foam plastic which is coated on the inside and outside with a strengthening coating. The building is designed in a CAD program. Then, the building surfaces are meshed in an automeshing program as one piece. Plates are added to the inner, outer and edge surfaces of the core by using copying at zero distance. The core is Solid Meshed. The boundary conditions are chosen for the boundary nodes. Appropriate characteristics of the EPS and GFRC have been assigned to the core and plates. A FEA analysis can be run.