What it is, how it works, and the questions to ask before you hire.
Last updated: October 2026
When a foundation has settled — one corner dropped, a side sunk — the fix is to transfer the structure's weight down to stable soil that isn't moving. That's what piering (underpinning) does: steel or concrete piers driven or screwed past the unstable upper soils, then used to stabilize and sometimes lift the foundation back toward level. This guide covers the main pier types, how to tell which fits your situation, and the Texas-specific wrinkle (concrete vs. steel).
Helical piers are screwed into the ground like giant screws — they work well for lighter structures, additions, and spots where installation torque can be verified. Push (resistance) piers are driven straight down hydraulically, using the building's own weight as the resistance — the standard choice for a settled full-size home. Both end at stable soil; the difference is installation method and load path.
Texas has a long local tradition of poured concrete piers (sometimes called concrete pilings), and many Texas contractors still install them — it's regional practice as much as engineering. Steel piers (helical and push) are the newer standard in most markets. Ask any contractor why they prefer their method for your soil conditions, not just what they always install.
Stabilization — stopping further movement — is the guaranteed outcome. Lifting toward level is attempted on many jobs but has limits: finishes, plumbing, and brittle materials can only take so much correction. A good contractor sets expectations about lift vs. stabilization before the first pier goes in.