What causes concrete to sink or settle?

Concrete settlement is usually caused by two main reasons. The first and main reason would be if your concrete has been installed on uncompacted or poorly compacted fill dirt. This is common with slabs poured close to your home or building such as concrete pool decks, patios, sidewalks, and garage floors. This is also a big problem around pool areas. We generally see this while completing concrete slab repair. Settlement will usually cause trip areas or water problems from the slabs being pitched improperly toward your foundation. Complete settlement of your concrete can sometimes take 5-7 years or more under certain circumstances.

The second reason would be from water drainage or run off. An example of this would be a down spout discharging next to a section of walkway, or improper drainage from the landscape which collects near your concrete.

What is concrete leveling and how long has it been around?

Concrete leveling and concrete lifting is a process of saving concrete slabs or areas by drilling a series of holes completely through the slab and then pumping a grout mixture under the slab until pressure begins to build which raises the slab or slabs back into position.

Concrete leveling has been around and in use for approximately 75 years. It has been used to save concrete highways, airport strips, and slabs of all weights and sizes. We use it most often in our concrete sidewalk repair. It has a proven history of success, durability, and permanency.

What is mudjacking?


  1. A pattern of 1″ to 1 1/2″ holes are drilled throughout the sunken slab or as needed in order to inject the lifting material through the slab.
  2. A soil/cement mixture known as grout is pumped through the holes to the underside of the slab. Once the large voids are filled, the grout becomes pressurized and begins to raise the slab.
  3. The holes are then patched with a quick set high-strength cement, allowing for immediate use of the area in most cases.

Why should I level my concrete instead of replace it?

If your concrete is in good condition and not crumbling, deteriorating, or has several cracks, it would be impractical to spend 2 to 3 times the money or more to have it replaced. Concrete leveling is just as permanent as replacement if not more. Concrete leveling has the following advantages over replacement:

  • Saves approximately 50% and to add 75% over having your concrete replaced
  • Avoids slab color differences as with replacement
  • Can be used in hours instead of days
  • Strengthens your existing concrete by filling voids which weaken the stability of the slab and create a bridge effect where concrete can break
  • Usually has a minimal effect on surrounding landscape from not having to excavate, form, or drive large trucks and equipment over your lawn.
  • No building permits required which can complicate and delay your repair time.
  • Helps protect the environment from not disposing of your concrete: use of more trees for form wood, running larger equipment which burns more fuel and pollutes the air from exhaust emissions

Can you see the holes?

We now are able to raise concrete by injecting through 1″ holes, ( or about the size of a quarter). Although it has been such a minor concern to our past customers, the following describes concrete patching and or matching.

Concrete is made of basically four different products. Stone, sand, portland cement, and water. The color is dependent upon which quarries the stone and sand came from, which location the portland cement came from, and how much water was used. Now you factor in the age of the concrete and how much the sun has bleached it, how much dirt, tree leaves, etc. have settled on the surface over the years. Because it is virtually impossible to match new and old cement or concrete, the holes will be visible to a certain point when they are new. (Which in comparison to a new bright white slab from replacement is preferable.) However, as time passes, the holes will weather and begin to blend with your existing concrete.

I have a water problem; will leveling the concrete stop it?
Outdoor concrete should be poured with a pitch. A pitch allows for water to drain away from your home or foundation wall. If your concrete has settled toward your home, this would reverse your pitch causing water to be directed toward your foundation and basement wall. While concrete leveling has solved many water problems due to reverse pitch, it cannot solve them all.

There are several other things that can cause water problems. One hint would be to check your down spouts which are a big problem when the discharge to close to the foundation. Other reasons for water problems include a high water table, poor drainage installation, and poor grade. But one thing that is definite is if your concrete is pitched toward your home, it is not a good thing and should be corrected.

Can concrete leveling be done all year?

While concrete leveling is not as temperature sensitive as pouring concrete, it can be done in colder temperatures. However, because of heavy ground frost which will bind to the slabs in areas with sub freezing temperatures, it will prevent the slabs from rising. It is also not recommended to raise concrete on frozen/expanded soil due to resettlement during the spring thaw. We also use water in the concrete leveling process which will freeze. Our season usually runs from March through December. However, in a mild winter season, we have lifted in January and February, but that is uncommon. We still do estimates all year long which would place you on our schedule upon start up. Please do not hesitate to call for an estimate even if it is the winter season. We will be glad to take a look at your job.

Cost of mudjacking?

Most concrete slabs in good condition can be leveled. One thing that can prevent concrete from being re-leveled is a restriction. An example of this would be if you placed columns on top of the slab to support a deck or addition above it, or steps which have been fastened to the house. Sometimes you can have the steps removed for us prior to having the concrete leveled and then replace them once we are done.

There are several factors that affect the cost of your job such as difficulty, ease of access, amount of material needed to complete, etc. First we need to be fairly confident your concrete can be saved. Second, we want to quote you a fair, accurate price. The only reasonable way to do this is for us to assess your concrete. This can often be done. Add: quickly and easily through photos.

How long will concrete leveling last?

Concrete leveling has over 75 years of time tested success and permanence and has been used on everything from highways to airport runways. It is just as permanent as concrete replacement if not more so. Unlike most concrete replacement contractors, we guarantee all of our work. We have had to warranty less than 1% due to failure, so you can have full confidence that concrete leveling is the smarter, cost-effective approach to concrete replacement.

Why choose the Concrete Chiropractor Leveling Service?

  • We return all calls within 24 hours.
  • We only specialize in Concrete. It’s our full-time business.
  • We have the experience and equipment to do your job correctly.
  • We are reasonable, reliable, and insured.
  • We come highly recommended commercially and residentially with references supplied upon request.
  • We have and want to preserve our excellent reputation and customer base and will do whatever necessary to maintain them.