The challenge
Why Professional Engineering Matters to Pool Design
At Ultimus Engineering, we understand the significant investment and pride that comes with building and owning a swimming pool. However, it’s crucial to address a critical aspect of pool construction that directly impacts its longevity and safety: structural engineering.
The Challenges of Various Soils
Across the Nation
Headquartered in Texas, we face unique challenges due to the high Plasticity Index of our soils. Specifically referred to as the potential of vertical rise (PVR), this measurement indicates how much the soil can swell and shrink with changes in moisture content. The expansive clay soils prevalent in our region can undergo significant fluctuations, leading to potential structural issues for swimming pools if not properly addressed.
Other locations across the nation experience their own special challenges. Partner with licensed professional engineers who understand the nuances of your geography.
It is not uncommon to see PVR data in Texas averaging 5-6 inches of movement. No amount of structural engineering alone can withstand this level of movement against a pool foundation. Additional ground preparation techniques, and possibly deep foundation design, must be implemented to ensure the longevity of the swimming pool.

