Slab Lifting — Level Floors Without Replacing the Slab
Slab lifting for Tallahassee homes with uneven floors, void fill under settled slabs, and concrete leveling for driveways and walkways.
Call now — +1-PLACEHOLDER-TWILIOSlab lifting in Tallahassee
Slab settlement in Tallahassee is mostly a drainage and soil problem. Tallahassee’s sandy clay soils wash out under slabs when drainage routes surface water beneath the foundation. Once a void forms under the slab, the unsupported concrete section cracks and drops.
The standard repair used to be tear-out and replace — expensive, disruptive, and time-consuming. Polyurethane foam lifting solves the same problem in hours, at a fraction of the cost, with results you can see the same day.
What slab lifting can fix
- Sloped floors in main living areas where one side of the room has dropped
- Raised or sunken threshold transitions between rooms or between interior and garage
- Settled garage floors creating drainage toward the structure instead of away from it
- Uneven exterior steps, walkways, or pool deck panels
- Driveways with settled sections creating water pooling near the foundation
Slab lifting works best on concrete that is still structurally intact. Cracked or deteriorated concrete that has lost its load-bearing integrity is a replacement project, not a lifting project. We tell you which situation you have during the inspection.
The lifting process
1. Inspection and layout: We confirm the settled area, estimate void volume, and map the injection port locations. Standard port spacing is 18”–24” in a grid pattern across the settled section.
2. Drilling: We drill 5/8” injection ports through the slab — small holes that get patched after the job.
3. Foam injection: High-density polyurethane foam is injected in controlled lifts. The crew monitors the slab as the foam expands and stops at the target grade. We work in small lifts to avoid over-correction.
4. Patching: Injection ports are patched with quick-setting concrete. Surface-matching caulk is used at any existing cracks to prevent water infiltration.
When slab lifting isn’t enough
If the slab has settled because the foundation itself has moved — not just because a void formed under an interior section — pier installation is the correct repair. We see both situations. The distinction matters: lifting a slab that continues to settle because the foundation wall is moving is a temporary fix, and we won’t sell it to you as a permanent one.
Free inspection confirms which situation you have.
Slab Lifting & Leveling — common questions
- What is slab lifting and how does it work?
- We inject high-density polyurethane foam through small drilled ports in the slab. The foam expands under the slab, fills voids, and lifts the concrete back to grade. The ports are then patched. The process is minimally invasive and the foam cures in minutes.
- Is polyurethane foam lifting permanent?
- The foam itself doesn't degrade. However, if the underlying soil conditions that caused the void haven't been corrected — poor drainage, eroding sandy soil, ongoing clay shrinkage — the slab can settle again. We tell you if we think soil correction or drainage work is needed alongside the lift.
- How is slab lifting different from mudjacking?
- Mudjacking pumps a cement-soil slurry under the slab. It's heavier than the soil it replaces, which can sometimes accelerate re-settlement in sandy soils. Polyurethane foam is lighter, cures faster, and the injection ports are smaller. We use foam exclusively.
- Can slab lifting fix my garage floor or driveway?
- Yes. Settled garage floors, driveways, and walkways are good candidates as long as the concrete itself isn't cracked through or deteriorated. We assess during inspection.
- How much does slab lifting cost?
- Slab lifting in Tallahassee typically runs $2,000–$7,000 depending on the area to be lifted and the volume of foam required. Small sections (a single panel or step) can run $300–$800. We estimate based on square footage and severity.
Get a free slab lifting & leveling quote
Serving Tallahassee and the surrounding area.