Why retaining walls fail in Florida — and how to build one that doesn't
Leaning walls almost never fail from weight. They fail from water. Here's what goes behind a wall that lasts.
When a retaining wall leans, bulges or spills its top course, the cause is almost always the same: water built up behind it and pushed.
Florida's rainy season dumps water faster than saturated soil can move it. That trapped water exerts enormous lateral pressure — far more than the soil weighs dry.
A wall built correctly starts below grade on a compacted aggregate footing, not dirt. That base is what keeps the bottom course from settling unevenly.
Behind the wall goes clean drainage stone wrapped in filter fabric, plus a perforated drain line daylighted where the water can actually leave. Nobody sees that part, and it decides the wall's lifespan.
Taller walls need geogrid — fabric layers tied back into the soil that turn the wall and the slope into one mass instead of two things fighting each other.
If your existing wall is leaning, don't just reset the top courses. The drainage has to be rebuilt or you'll be doing it again after the next storm season.
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