Concrete Raising & Leveling

concrete raising

Sinking, settling, and un-level slabs is a problem that can be seen on old and new homes alike. It is typically caused from poor soil conditions, or it could be a result of improper building or pouring techniques being used during the time of construction.

To take care of the problem, Don Kennedy and Sons can make use of a technique known as polyjacking.


The process begins with us thoroughly cleaning off the surface of the damaged slab. Next, we will drill tiny holes into the concrete. A special polyurethane foaming material from SafeBasements™ will be injected into the holes and it will fill up the space beneath the slab. The force of the foam will be able to push the surface back up to the level where it needs to be. Our team will fill in the holes and patch them over so that they match with the rest of the surface. The foam will cure within about 15 minutes, and afterward, the surface can be walked or driven over like normal once again.

concrete raising

In the past, many contractors made use of a technique known as mud or slabjacking to take care of this problem. However, we feel as if our process is much more effective, and much cleaner. Mudjacking makes use of a messy, concrete slurry mix. Also, larger holes need to be drilled into the damaged surface in order to pump the mix beneath the slab. Often times, these holes can be difficult to patch over.

We can also take care of the cracks which may have formed on the surface as a result of the settlement problem.

Foam Jacking

Why Does Concrete Sink?

This is a very heavy building material. When the soil beneath a slab cannot support its weight, it will start to settle. There are many different types of soil, and each of them have different load-bearing capacities. Once that capacity has been reached, the earth will start to compact and structures above will sink. Additionally, the problem can be caused from the washout of soils because of improper drainage.

We Provide Concrete Raising to the following area:

AL: Anniston | Athens | Auburn | Birmingham | Cullman | Decatur | Florence | Gadsden | Hampton Cove | Hoover | Huntsville | Jasper | Madison | Montgomery | Owens Cross Roads | Selma | Tuscaloosa

FL: Callaway | Crestview | Destin | Fort Walton Beach | Milton | Niceville | Panama City | Pensacola

MS: Columbus | Corinth | Meridian | Tupelo

TN: Columbia

To see our full service area, click here to view our service area map.

Don Kennedy and Sons Structural Solutions
Huntsville Location
7201 Stringfield Rd  NW
Huntsville, AL  35806
256-964-3929  Google+
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Birmingham Location
420 N 20th St Ste 2200
Birmingham, AL  35203
205-918-7897 Google+
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Emerald Coast Florida
Destin/Fort Walton Beach, FL  32547
850-659-7835  Google+
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