Foundation Repair Services in St. Louis

St. Louis Foundation Co. repairs the full failure chain St. Louis clay causes: settlement (piering from $1,200/pier), bowing walls (from $2,500), cracks (from $400), wet basements (from $2,500), and sunken concrete (from $500) — each with a free measured evaluation first.

Why the services come as a set

The metro's shrink-swell clay doesn't specialize. The same saturation that bows a basement wall leaks through its cracks, floats the patio slab, and — come drought — settles the footing it spent spring pushing. Companies organized around one product sell that product; we're organized around the clay, which is why an evaluation here reads the whole chain and the scope only includes the links your house actually needs.

Which repair fixes which failure

Every foundation symptom in this metro traces to one of five mechanical problems, and each has one honest fix. This is the map the evaluation walks through with you:

What you see	What's happening	The fix	Typical range	Time
Stair-step brick cracks, sticking doors, sloped floors	Footing settling as clay shrinks under it	Steel piers to load-bearing strata	$4,000–$15,000+	2 days–1 week
Horizontal wall crack, inward bulge	Saturated clay pushing the wall laterally	Carbon fiber, braces, or anchors	$2,500–$10,000	1–2 days
Vertical crack leaking or widening	Shrinkage or minor movement opening a path	Injection with reinforcement	$400–$1,500	Hours
Water at the cove joint, damp walls	Hydrostatic pressure with nowhere to drain	Interior drainage and sump	$2,500–$8,000	1–3 days
Sunken driveway, patio, garage slab	Fill washout or clay shrink under the slab	Polyurethane lifting	$500–$2,500	Hours

Multiple symptoms usually mean one cause expressing itself in more than one place — which is why scoping them together, in one visit, beats three separate contractors diagnosing three separate "problems."

How the ground under St. Louis decides the repair

Three soil regimes run through this metro, and the right repair depends on which one your street sits on. The upland clay belt — most of the city, Kirkwood, Webster Groves, Affton, Florissant — is shrink-swell clay that cycles with the seasons; it drives the classic bowing-wall and settlement pattern, and repairs there are engineered around lateral pressure and reaching below the active layer. The river valleys — Chesterfield Valley, the St. Charles bottoms — sit on deep alluvium that moves with moisture at depth, so piering there is specified for depth-to-refusal, not a standard pier count. And the south county karst belt around Oakville rides on limestone that moves groundwater unpredictably, where sudden or accelerating settlement gets treated as a flag for deeper investigation before anyone quotes a fix.

Missouri's residential code puts frost depth at 30 inches here, and the metro cycles through freeze and thaw dozens of times each winter — one more load the ground puts on a footing every year. A repair that ignores which regime it's standing in is a repair priced to be redone. Ours name the regime in the written scope, because the evaluation measured it.

Permits, engineering, and paper that matters at resale

Structural repair in the St. Louis metro is paperwork-heavy for good reason: buyers and their inspectors know these soils. Piering and wall-restraint work typically involves municipal permits, and lenders on a future sale will want to see the repair documented — what was installed, where, to what depth or torque, under whose engineering. Our scopes are written to survive that scrutiny: measurements and photos from the evaluation, itemized installation records, and transferable warranty terms in writing. If a bid you're comparing can't produce that paper trail, price the difference accordingly — the discount usually reappears at closing time.