Inside 45-degree Corner Construction

What happens here

This step covers building an inside 45-degree corner, which requires slightly more specialized treatment. For inside 45-degree corners, blocks should be saw-cut to create a clean, tight seam, rather than split. Splitting a block for this angle would result in an uneven, rough face that disrupts the aesthetic and structural integrity of the corner. The blocks should be buttered up tight, and any gaps in the back filled with gravel or spare units to prevent tipping. Leaving gaps can create a tipping point and compromise the wall's stability. While specialty 'cobble units' (half-standard units) exist, saw-cutting standard blocks is often necessary or preferred for a precise fit.

Goal: Construct an inside 45-degree corner with a clean, stable finish.