Foundation underpinning involves using systems like push piers, helical piers, and caissons to support a home's foundation by driving steel piers down through the soil until they reach bedrock. For homes with settling or cracking foundations, engineers developed push pier systems to move the home's weight onto a stable bedrock support below unstable soil. The home's weight is attached to the steel piers with brackets connected to the footing, allowing each pier to be adjusted to level the entire home. An engineer evaluated one home and determined it required a full foundation underpinning project due to major foundation movement issues throughout the entire structure.