INSULATED BUILDING BLOCK
An insulated, substantially rectangular building block (10) is disclosed. The block (10) contains two spaced, outer supportive parts (12, 14) which are interlockably connected with each other and which extend along the length of the block; and a curvilinear inner insulating material (16) is present in the space between the supportive parts (12, 14). Each of the outer supportive parts (12, 14) has a configuration which differs from that of the other such part. The insulating material (16) is wedge-shaped, and it fits into a space between said supportive parts (12, 14) which is defined by walls which extend inwardly from the top (30) of the building block (10) to its bottom (32).