Menifee ground holds expansive clay that moves with seasonal moisture. Pouring directly on native dirt causes slabs to heave during winter rain and buckle when summer heat dries the ground.
gov/app/) shows that the soils across this part of Riverside County feature fine textured clay with high shrink and swell potential. When winter moisture infiltrates untreated ground, the soil expands upward with tremendous hydraulic force, lifting exterior flatwork unevenly. As summer arrives, that moisture evaporates rapidly, leaving empty voids beneath the concrete where the subgrade recedes.
To prevent this movement, Terrence Boyd excavates the unstable native soil and installs 4 inches of crushed aggregate base compacted to 95 percent density. This porous layer distributes weight evenly and gives water a path to drain away from the slab perimeter. Steel rebar grids placed inside the pour tie the concrete together, preventing slab separation even when the surrounding earth shifts during prolonged seasonal droughts.