Flat land, clay soil and drainage in Natomas
Because the ground is so flat, water has few places to go. A slab poured without a gentle slope can hold puddles after rain, and soil that stays damp near a foundation can move more than people expect. Valley clay also swells and shrinks with moisture, which stresses thin or poorly prepared slabs.
Parts of the area sit in mapped flood zones, and local rules may affect how a site is graded or built. We look closely at drainage, existing grading and the position of downspouts, then plan the slope and base so water moves away from the house.

