Evaluating a Segmental Retaining Wall: Batter, Alignment, and Drainage

A photo shows a segmental block wall with two issues: (1) proper batter (setback) but uneven courses, and (2) horizontal alignment that wanders at each block. Drainage detail is also wrong—filter fabric behind the wall instead of compacted gravel and a French drain.

What’s Right

• Batter (step-back) is correct for stability.

What’s Wrong

• Course alignment: Blocks should nest tightly; visible gaps and shifting angles indicate poor installation.
• Drainage: Fabric alone traps water. Correct: 12″+ compacted gravel backfill + perforated drain pipe at base, wrapped in fabric, day-lighted to outlet.
• Geogrid reinforcement: Walls over 3 ft tall typically need geogrid layers (pinned between courses, extending 4–6 ft back). Absent a soils report waiving this, it’s required.

Verdict

The contractor cut corners on alignment, backfill, and reinforcement. Demand correction or hire a third-party inspector. A wall this sloppy will bulge, leak, or fail.