Why Sunken Slabs Happen: Expansive Clay, Freeze-Thaw, and Settling Explained
Your driveway did not sink because the concrete failed. It sank because the soil under it moved. In Des Moines, most sunken slabs happen because expansive clay soils swell when wet, shrink when dry, and heave through every freeze-thaw cycle central Iowa throws at them. Add in loose fill soil in newer subdivisions, downspouts that […]