Houston sits on some of the most challenging soil in Texas. The Gulf Coast clay — locally called “gumbo” — creates unique problems for swimming pools.

According to the U.S. Geological Survey, Greater Houston experiences both expansive clay soil and land subsidence — a combination that puts extraordinary stress on pool structures.

Seasonal Expansion & Contraction Houston’s clay soil absorbs water during heavy rains, expanding and pushing against your pool shell. During dry periods, it shrinks and pulls away, leaving voids beneath your pool.

Land Subsidence Decades of groundwater extraction have caused parts of Houston to sink — in some areas, more than 10 feet since the 1900s. The Harris-Galveston Subsidence District monitors this ongoing issue. Even minor subsidence cracks concrete and separates plumbing connections.

Flooding & Drainage Houston’s flat terrain means water often pools around structures rather than draining away. This saturates soil unevenly, stressing your pool.

The Result? Cracks at skimmers, separations at fittings, failed seals, and underground plumbing breaks — often undetected for months.