Step 6: Completing the Foundation:
I stagger stacked five more layers of building block. After each layer of block, I filled the square with “urbanite” and large rock, filled all of the spaces and covered the rubble with 5/8” minus, and compacted it all with a length of 4”x4”. I did not fill the last layer of block so that the insulation layer would be deep enough. I capped the last layer of cmu with the 4”X8”x16” concrete cap.