Slab lifting is the act of raising a settled concrete slab back to its original elevation by injecting expanding polyurethane foam beneath it until it rises.
In depth
Slab lifting is the raising half of concrete raising: as foam is injected and expands under the low area, its controlled pressure pushes the slab upward while simultaneously filling the void that let it drop. Technicians monitor the rise in real time and stop when the slab is back in line with adjacent sections.
The same technique applies to sidewalks, driveways, garage and basement floors, patios, pool decks, and porches. Because the foam cures in minutes, lifted slabs are ready for use almost immediately.
How Acme applies it. Acme selects foam density based on the load, using lighter residential foam for patios and walkways and higher-density formulations for commercial slabs and heavy infrastructure, so each lift is matched to the job.
Related terms: Polyurethane Concrete Raising, Concrete Leveling, Under-Slab Void, Foam Density
Frequently asked questions
How does foam lift heavy concrete?
As the two-part polymer reacts it expands with enough controlled force to raise the slab, while its rigid closed-cell structure then supports the load permanently.
Will lifting crack my slab?
Injection is gradual and monitored, so a sound slab is raised evenly. Slabs that are already badly broken may be better replaced, which an inspection determines.