When this service makes sense
High-density polyurethane foam is injected through small holes beneath settled concrete. As the material expands, it fills voids and can raise the slab in controlled increments. The first step is determining whether the slab is still strong enough to preserve and whether the movement is primarily settlement rather than upward heave.
What affects price?
Contractors look at the number and size of slabs, depth of the void beneath them, amount of elevation change, access for equipment, material choice, surface condition and minimum service charges. That is why two projects with the same visible square footage can price very differently.
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Common questions
What is polyurethane foam concrete leveling?
A contractor drills small access holes and injects expanding polyurethane beneath the slab. The foam fills voids and applies lifting pressure to the concrete.
How soon can concrete be used after foam lifting?
Polyurethane systems cure quickly, but the contractor should give the exact return-to-service time for the product and application used.
Is foam leveling waterproof?
Closed-cell polyurethane products resist water, but leveling does not eliminate the underlying drainage issue that may have contributed to settlement.
Is foam more expensive than mudjacking?
Foam is often priced higher per square foot than traditional slurry methods, although project access, void size and minimum charges can change the comparison.