Repair Methods
Concrete Piers
This is by far the oldest but cost-effective method for clay type of soil. By pushing a series of concrete cylinders connected by a cord under your home.  
The benefits of using piers to repair a foundation are as follows:
Low cost. Up to ten times less than replacing the building foundation; No disruption or loss of use of the dwelling. The repair is performed with the building being used as normal; The equipment is portable and can be easily used in tight spaces or carried by hand where access is a problem.Remedies both the cause of the settlement (unstable soil) and the consequences (dwelling out of level) in one step.
No yard destruction; No heavy equipment.
Square-shaft Helical Piers
Square-shaft helical products were originally developed for the electric utility industry to help support utility poles and guy wires in a tension application. Later, contractors began using this system to support building foundations even though typical square-shaft helical pier systems are NOT designed to carry high compression loads and can bend and buckle under the weight of a home. Square-shaft helical piers can also twist during installation in stiff soils, limiting the depth that the pier can acheive. Using square-shaft helical piers in the wrong application can be a costly mistake for a homeowner.
Push Pier Systems
Steel Push Pier systems utilize hydraulically driven tube sections and foundation pier brackets made from industrial-strength steel to transfer the weight of your home from unstable soil, through the piers, to competent soil or bedrock. The Foundation Supportworks’ Push Pier System does not rely on friction for capacity and has the ability to reach the problem soil. Used in both residential and commercial applications, pier installation can be completed year-round, does not require the use of heavy equipment. Push Pier Systems is best suitable for home with basement.
Round-shaft Helical Pier Systems
Foundation Supportworks’ Round-shaft Helical Pier Systems are another alternative for stabilizing settled foundations. Round-shaft helical piers have a high resistance to buckling and have the strength to reach deep into competent soil. Helical piers are installed by mechanically “screwing” them into the soil. Because the installation of helical piers does not rely on the weight of the structure for a reaction. This makes them ideal for lighter structures, such as decks and concrete stairs.