As a QC Engineer during site visit I do observed these kind of non-conformance many time the root cause analysis is too difficult for me, all the masons are trained procedure briefing has been given to them in their speaking language I came to the conclusion its lack of skilled mason, I will escalate my findings to construction team we need experienced masons.
Cavity Wall tie not provided in alternate layer.
Fair face of block not provided at door.
Block not stacked properly.
Lines and Level not monitor properly.
Block not fixed properly and top layer placed.
Stretcher Bond not followed at junction.
Mortar thickness not within tolerance.
Block not placed properly at junction.
Manual cut block used resulting uneven mortar joints.
Curing in block-work not monitored.
Line and Level of joint not monitor properly.
