Retaining Wall
A structure designed to hold back soil on sloped properties, preventing erosion and creating level areas.
Why It Matters for Homeowners
Why it matters: retaining walls fail when drainage is wrong, not when the wall material is wrong. Water builds up behind the wall (hydrostatic pressure) and pushes it out, often within a few years for poorly drained walls regardless of construction quality. The fix is a drain rock backfill plus weep holes or a perforated drain pipe at the base. In California, walls over 4 feet typically require engineering and a permit.
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