What Is Hydrostatic Pressure?
August 9, 2023
Knowledge shared by
Bart Zazzali

Hydrostatic pressure is the force exerted by water as it builds up in the soil surrounding your home’s foundation. When the ground becomes saturated—typically from heavy rain, poor drainage, or a high water table—that water pushes against the foundation walls and floor with increasing pressure.
Causes of Hydrostatic Pressure
- Heavy or prolonged rainfall that saturates the ground Improper drainage around the home, including clogged gutters or downspouts
- High water table in the area
- Poor soil grading, which directs water toward the house instead of away from it
- Lack of waterproofing or exterior drainage systems during construction
Potential Damages to Your Home
If left unaddressed, hydrostatic pressure can cause serious damage, including:
- Cracked or bowing foundation walls
- Water seepage through walls or floors, leading to a damp or flooded basement
- Mold and mildew growth from increased moisture
- Damage to flooring, insulation, drywall, and stored belongings
- Decreased property value and costly structural repairs
Bottom line: If you’re noticing water in your basement or cracks in your foundation, hydrostatic pressure may be the cause—and it’s crucial to address it before the damage gets worse.
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