Polyurethane Concrete Lifting in Sioux City, IA
$8 to $25 per square foot — roughly 20 to 40 percent above mudjacking regionally. Here is exactly what that premium buys, and when it isn't worth paying.
Method
Two chemicals, one small hole
Ports about 5/8 of an inch across — dime to nickel size — are drilled through the slab. A two-part polyurethane is injected through them, and it expands in place, filling the void beneath the concrete and then lifting it. The operator controls the rise in small increments, which is what makes foam the precise option when a slab has to come up a specific fraction of an inch.
Expanded, the foam weighs roughly two pounds per cubic foot. That number is the whole argument for using it in Siouxland: when a slab dropped because saturated silt could not carry what was already on it, putting a heavy fill underneath is working against yourself. Foam fills the space without adding meaningful load.
It also cures in under an hour, so a driveway or a business entrance goes back into service the same day rather than sitting closed for one to three days like a mudjacked slab.
Foam vs. slurry, side by side
| Foam | Mudjacking | |
|---|---|---|
| Per square foot | $8 – $25 | $4 – $9 |
| Port size | 5/8 in | ~1 in |
| Cure | < 1 hour | 1 – 3 days |
| Weight added | ~2 lb/cu ft | Much heavier |
Typical national and regional ranges published for budgeting, not quotes.
Straight talk
When the premium is worth it — and when it isn't
Pay for foam when
- • The soil under the slab has washed out and stayed soft
- • The slab has to carry traffic today, not Thursday
- • The lift has to be precise and small
- • Access is tight and a smaller port pattern matters
- • Ground near a river bottom keeps re-wetting after high water
Save your money when
- • The ground under the slab is firm and stable
- • A one-to-three-day cure is no inconvenience
- • The job is a straightforward patio, walk or stoop
- • Budget is the deciding factor and slurry will hold
On plenty of Sioux City jobs the cheaper method is the right method. Being told that plainly is the point of this site.
Applied
Where foam gets used around Siouxland
River-bottom ground in Dakota Dunes and South Sioux City is where the weight question comes up most often. Same for slabs sitting over ground that was soaked during high water and never fully recovered.
Around town, foam gets used on driveways that cannot be out of service and on shop floors carrying equipment loads. Per-job totals for both methods are in the cost guide.
Polyurethane questions
- Why does foam cost more than mudjacking?
- The material and the rig. Polyurethane is a two-part chemical injected from specialized equipment, and regionally it runs roughly 20 to 40 percent above mudjacking — about $8 to $25 per square foot against $4 to $9. You are buying light weight, precision and a same-day return to service.
- How light is the foam really?
- Around two pounds per cubic foot once expanded. For comparison, a slurry fill is far heavier per cubic foot, which is why foam is preferred where the ground has already proven it cannot carry extra load.
- When can I drive on it?
- Usually within about an hour of the last port. The foam reaches most of its strength within minutes, which is why it gets used on drives and commercial slabs that cannot be closed for days.
- Is it safe next to the house and the yard?
- The cured foam is inert and stays where it was placed. It does not dissolve, and it is not affected by the wet-dry cycling that moves the loess around it.
Not sure which method your slab needs?
Describe the slab, the drop, and what the ground has been through. We'll tell you which one fits and what it runs.
Prefer to read the numbers first? Open the Siouxland cost guide.