How Hydrostatic Pressure Damages Retaining Walls and How Pros Prevent It Most homeowners assume retaining walls fail because of age, poor materials, or visible cracks. But the truth is, the biggest threat to any retaining wall—especially in North Canton’s weather—is something you can’t see: hydrostatic pressure. It builds quietly underground, slowly pushing against the wall until the structure begins to bend, bow, crack, or collapse. Professionals who build long-lasting walls