Foundation repair methods, compared

There is no best method, only a method suited to your soil, your load and your access — which is why two competent contractors can propose different systems for the same house and both be defensible. Concrete pressed pilings suit deep uniform clay and are the Texas workhorse. Push piers go to genuine load-bearing strata and are more definitive. Helical piers work where there is not enough structural weight to press against. Drilled piers are for shallow rock. What should worry you is not which one is proposed but whether the contractor can explain why it fits your site.

Usually because they are solving the problem differently, not pricing the same solution differently. One may plan to support the perimeter only; another may include interior piers reached by tunneling. One may be proposing to lift the slab back toward its original elevation; another may be proposing to stabilize it where it is and stop further movement. Those are genuinely different jobs with different risks. Line up the scope — number of support points, method, target depth, what happens to the plumbing, what the warranty covers — and the price difference usually explains itself.

Stabilizing means installing support so the foundation stops moving from where it currently is. Lifting means using that support to raise the settled sections back toward their original elevation. Lifting sounds obviously better and often is not: forcing an older house back to level can crack plaster, break tile and open new gaps in finishes that had long since adjusted to the settled position. A good contractor will tell you how much recovery they expect and where they intend to stop, and "as close as the house will tolerate" is a more honest answer than "perfectly level".

Most piering jobs on a typical home are a two to five day exercise once work starts, and a straightforward exterior perimeter job is often a single day. The schedule stretches when interior piers are reached by tunneling under the slab, when drainage work is bundled in, or when an engineer's post-repair elevation survey is part of the contract. The longer part is usually before the crew arrives — getting estimates, the engineer's input if you want it, and the permit.

Almost always, and they vary enormously. The questions that matter: does it cover the support points only or the whole structure, how long does it run, does it transfer to a future buyer, and are later adjustments free or billed? A transferable lifetime warranty on the piers is not the same thing as a warranty on your house staying level. Two quotes a few thousand apart can carry very different warranties, and that difference usually outlives the price difference.

Partly, and this surprises people. Lifting a settled section closes some cracks as the structure returns toward its original geometry — and opens others, because not everything moves back the way it moved out. Cosmetic repair afterwards is normally excluded from the foundation quote: drywall patching, repainting, re-tuckpointing brick and re-hanging doors are usually your problem. Budget for it separately and ask explicitly what is and is not included.