What’s the difference between hydraulic and helical piers?
The difference between hydraulic and helical piers lies in their purpose. Helical piers are hollow, threaded pillars that are fairly easy to screw into the ground with little soil disruption. Hydraulic piers, also called push piers, are smooth pillars that must be driven into the ground by a powerful hydraulic pump. They’re more often used beneath industrial buildings rather than homes.