Henry P Keleske

US Patent:

39823695, Sep 28, 1976

Filed:

Apr 18, 1975

Appl. No.:

5/569254

Inventors:

Henry P. Keleske - Milwaukee WI

International Classification:

E04B 200

US Classification:

52407

Abstract:

An insulation strip made of closed cell plastic foam is formed in the center of a building block transverse to the webs thereof and parallel to the side walls. The insulation strip extends beyond the edge of the sidewalls by 1/4 inch on all four side edges of the block so as to provide a 1/2 inch space for mortar joints between blocks when the blocks are stacked to form a wall. In one embodiment, the edges of the insulation strip are grooved in a cross-hatched pattern which tends to make the edges compressible, thereby permitting minor dimensional changes in the size of the mortar joint to keep the blocks aligned.