Key takeaways
- Both methods raise concrete by filling voids under it.
- Foam is lighter, uses smaller holes and resists water.
- Mudjacking can cost less on large, heavy-duty slabs.
How mudjacking works
Traditional mudjacking pumps a cement slurry through holes about an inch or two wide. The slurry fills the void and pushes the slab up. It is heavy, which helps on firm soils, but it can add load to soft ones and can wash out over time.
It has a long track record and is often lower in cost.
How foam lifting works
Polyurethane foam is injected through small holes. It expands, fills voids and lifts the slab, and then cures quickly. It is light and resists water, so it will not wash out, and the holes are small and easy to patch.
It is popular for driveways, garages and slabs in finished spaces.
Choosing
Both can work well. Consider the soil, the slab size, how fast you need it back in use and the budget. Foam is a strong choice when soil is soft, when water is a concern or when small holes matter, and we explain the options for your slab.
Fixing the cause of the sink, such as drainage, matters more than the product.
Related services
Quick answers
Is foam more expensive?
Often per square foot, though the speed and durability can offset it. We give both options when both fit.
How long before I can use the slab?
Foam cures in minutes to hours, and slurry takes a little longer. We tell you for the job.
Ready to talk it through? Get a free estimate or call 615-209-7643.