Summary Retaining walls bulge and pavers sink in the spring because trapped water freezes, expands, and destroys the foundation from the inside out. Without a deep, compacted aggregate base and non-woven geotextile fabric, Michiana's heavy clay soils will swallow your patio within a few seasons. Rigid, cheap concrete cannot survive our 42-inch frost depth, making flexible, interlocking paver systems the only permanent solution for outdoor living. The Psychology of the Spring
