Pressed concrete piers
Pressed concrete systems use precast concrete cylinders or segments driven into the ground beneath the foundation. Suitability depends on soil, load, design, and contractor methodology.
Steel piers
Steel systems can be driven to deeper bearing conditions depending on design and site conditions. Installation details and engineering matter more than a generic claim that one material is always best.
Helical piers
Helical piers use screw-like plates installed into the ground. They can be useful in certain applications, including new construction and repair, when design conditions support their use.
Choosing a system
Ask what condition the pier is meant to correct, how the support locations were selected, what assumptions the design uses, and whether engineering is involved. Compare steel vs. concrete piers.