Licensed FL CBC1267322 · FRO9007
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Helical Piers Florida by Solid Foundations
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Home/Services/Slab Lifting
Residential & Commercial Service

Concrete slab lifting — polyurethane injection, no tear-out.

A sunken driveway, settled pool deck, or dropped garage slab doesn’t have to be torn out and re-poured. Polyurethane slab lifting injects an expanding structural foam beneath the concrete, raising it back to level in hours. Lighter than the soil it replaces, sets in minutes, and costs a fraction of replacement.

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Slabs we lift every week

Any unreinforced concrete slab that’s settled below its original elevation is a candidate, as long as the slab itself isn’t structurally cracked beyond repair:

  • Driveways with drops at the apron, garage threshold, or expansion joints
  • Sidewalks, paths, and patio slabs settled at the seams
  • Pool decks that have tilted toward (or away from) the pool
  • Garage floors with the front-of-bay drop common in Florida construction
  • AC pads, generator pads, and equipment slabs that have tilted out of plumb
  • Warehouse floors and loading docks with localized settlement
Mudjacking vs. polyurethane — why we don’t do mudjackingMudjacking pumps a cement slurry under a slab. It works, but it adds weight to soil that already failed under the original load, the slurry stays wet for days, and the surface holes are 1.5"+ across. Polyurethane is closed-cell foam that weighs 2–4 lb/cu ft (vs. 100+ for slurry), sets in 15 minutes, and goes in through 5/8" holes that disappear after patching.

Why Florida concrete sinks in the first place

Slabs don’t fail randomly. Five Florida-specific drivers account for nearly all residential slab settlement:

  • Sand washout — irrigation, downspouts, or drainage failures wash supporting sand out from under the slab
  • Poor original compaction — fill placed too loose during construction continues to consolidate for years
  • Voids from broken pipes — slow leaks erode soil beneath, often discovered only when the slab drops
  • Organic decomposition — slabs poured over buried tree roots or organic muck sink as the organics break down
  • Hurricane saturation — soil bearing capacity drops sharply for weeks after major storms, slabs ride down with it

How polyurethane slab lifting actually works

We drill 5/8" injection ports through the slab at engineered locations — typically every 4–8 ft along the failed area. The hole pattern is sized to the slab dimensions and the depth of the void underneath.

Two-component polyurethane resin is injected through each port. The components react in the void, expanding to roughly 30x liquid volume in 15–20 seconds. The foam fills the void, then continues to expand against the underside of the slab, lifting it in controlled increments.

A laser level monitors the slab elevation in real time. The injector controls foam flow at each port to bring the slab back to target elevation without overshoot. Lifting tolerance is typically ±1/8 inch.

Once elevation is right, the injection ports are patched flush with the slab surface. The polyurethane reaches 90% strength in 15 minutes and full cure in 24 hours — the slab is drivable the same day.

What you can expect — typical timeline.

  • Free inspection & quote — within 3 business days of your call
  • Engineer-stamped design — 5–7 business days after acceptance
  • Permit pulled and crew scheduled — 1–2 weeks (varies by county)
  • Installation — typically 2–5 days for a residential project
  • Lift, load test, warranty issued — same day as install completion

Frequently asked questions

Common questions we hear during the free inspection. If yours isn’t covered, call 866-398-9323 — we’ll answer it.

How long will polyurethane slab lifting last?

Closed-cell polyurethane is structurally stable and hydrophobic — it doesn’t absorb water, doesn’t biodegrade, and doesn’t support fungal or root growth. Properly installed foam supports the slab indefinitely. The variable is the underlying soil: if the original cause (drainage, leak, organics) isn’t addressed, the slab can resettle in a different spot.

Is polyurethane lifting cheaper than slab replacement?

Typically 30–60% less. A residential driveway lift runs $4–$12 per square foot; replacement runs $10–$25 per square foot plus tear-out and curing time. The job is also done in hours, not days. For irreparable cracking or major slab failure, replacement is the right call — but for settled-but-intact slabs, lifting wins on every axis.

Will the injection holes be visible afterward?

Barely. 5/8" diameter, flush-patched with color-matched concrete grout. On exterior driveway and patio slabs the patches blend with the existing concrete within weeks of weathering. On interior or commercial polished slabs we can use specialty patching for a tighter color match.

Can polyurethane lift a slab that’s also cracked?

Yes, as long as the cracks aren’t structural and the slab still has continuity. Cracked slabs lift in segments — we map the crack pattern first and inject so each segment rises proportionally. For badly fractured slabs, lifting can buy time but replacement is usually the long-term answer. We tell you up front which category your slab is in.

How soon can I drive on or use the slab after lifting?

Pedestrian traffic immediately. Vehicle traffic in 15–60 minutes (foam reaches 90% strength almost immediately). The slab is fully cured at 24 hours.

Do you do commercial slab lifting?

Yes — warehouse floors, loading docks, manufacturing slabs, parking structures. Commercial polyurethane injection is the same technology scaled up: more injection points, higher-volume pumps, and night/weekend scheduling to keep operations running. Most commercial jobs are done in a single shutdown window.

Slab Lifting by region

We deliver this service across all 8 of our Florida regions. Click any region to see local soil conditions and recent project context:

Slab Lifting in Florida Cities

The 20 most-served Florida cities for this service — click any city for local soil conditions and a free on-site quote:

Reviews

What Florida homeowners say.

Real reviews from our Lake City Google Business Profile — covering work across all eight Florida service regions.

4.9
220+ reviews · A+ BBB

"40-year recertification flagged settlement on our condo building footings. Solid Foundations bid against two larger contractors — same engineering deliverable, slightly better schedule, and they were the only one whose torque logs included individual pier capacity. Board picked them unanimously."

EV
Miami Beach · 4 months ago

"They’re our local guys — Lake City based, and you can tell when something’s their home turf. PE knew exactly which neighborhoods had which karst profile before he even drove out. Quote came back the next morning, install was a week later."

JR
Lake City · 3 weeks ago

"Post-Idalia we had a slab corner that dropped almost an inch overnight. Solid Foundations had a PE on site within 48 hours, scope quoted same week, crew installed seven helicals and lifted the corner back to within a quarter inch of original. Insurance accepted the engineering package without pushback."

RT
Ponte Vedra · 1 month ago