The invention provides a building component comprising first and second high density foam panels (12, 14) each having inner and outer surfaces (30, 32), top and bottom (34, 36), and first and second ends (38, 40), the panels (12, 14) arranged in spaced parallel relationship with their inner surfaces (30) facing each other, and at least two bridging members (42) extending between and through and molded into the panel members (12, 14), each bridging member (42) comprising a pair of elongated end plates (46) oriented in the top to bottom direction of the panels (12, 14) and abutting against the outer surfaces (32) of the panels (12, 14), and at least one web member extending between and rigidly connected to the end plates (46), each web member oriented in the top to bottom direction of the panels (12, 14) and having a height substantially less than the height of the panels (12, 14).