Black cotton soil and what it does to foundations
Expansive black cotton soil is common across this corridor. It swells when wet and shrinks when dry, and a foundation designed as though it were stable ground will crack the structure above it — the cracked walls people notice two years after moving in usually start here. We investigate the ground first and design the foundation for what is actually under the plot, whether that means excavating to a competent stratum, a stiffened raft, or piling.
