Hydrostatic pressure is the pressure exerted by water on a structure, such as a foundation, due to its weight or movement. When the soil around a foundation becomes saturated with water, the water can exert hydrostatic pressure on the foundation, which can cause it to crack, shift, or even collapse.
To prevent hydrostatic pressure on a foundation, there are several measures that can be taken:
Proper Drainage: A foundation should be designed with proper drainage to ensure that water is diverted away from the foundation. This can be done through the use of downspouts, gutters, and sloping the grading around the foundation to direct water away.
Waterproofing: Applying a waterproofing membrane to the exterior of the foundation can help prevent water from seeping through and exerting pressure on the foundation. This can be done during construction or as a renovation.
French Drains: French drains can be installed around the perimeter of the foundation to collect and redirect groundwater away from the foundation.
Sump Pump: A sump pump can be installed in the basement or crawl space of a foundation to remove any water that may accumulate due to hydrostatic pressure. To make this more effective, provide a clear channel under the footing to the exterior weeping tile by connecting a length of weeping tile that goes from the exterior weeping tile directly to your sump-pit.
Proper Soil Compaction: Proper compaction of the soil around the foundation during construction can help prevent settling and movement of the foundation that could lead to hydrostatic pressure. Sometimes referred to as the clay bowl effect.
It's important to note that preventing hydrostatic pressure on a foundation requires proper design and construction, as well as regular maintenance to ensure that drainage systems are functioning properly and water is not accumulating around the foundation.