Laying the First Row and Sill Plate Alignment

What happens here

After squaring, begin laying the first row of blocks, starting from a corner. The presenter uses a block with a wooden 'joist' and 'sill' attached to illustrate how an unsquare or unlevel wall will prevent proper alignment of these critical structural elements. Each block must be placed accurately and carefully to ensure subsequent rows will align correctly and the overall structure remains plumb and level.

Goal: Properly lay the first row of concrete blocks to ensure straightness and alignment for future structural components.