Raise the Garage Floor with Slab Jacking

raise the garage floor

Over time, you may find that concrete floors on your property, particularly in your garage, begin to settle, sink, and become uneven. There are a number of things that cause this, but mostly it is the result of years of wear, traffic, and weight. Consider how much the vehicle or vehicles parked in your garage weigh: at least 2,500 pounds, and up to 4,000, while the average prehensile resistance of a concrete floor is 3,000 pounds per square inch. It is, of course, possible to restore a level floor by building up the sinking areas, but this is temporary and doesn’t tend to the issues of support beneath the concrete. Among the best and most effective ways to raise the garage floor is a process known variously as “slab jacking,” “foam jacking,” “mud jacking,” “concrete leveling,” or, simply, “concrete raising.” In short, slab jacking reinforces the problem areas beneath the surface that are yielding to the pressure from the concrete and the activity upon it. Read on to learn more about what causes concrete floors to sink, slab jacking to raise the garage floor, and what slab jacking is in detail.

What Causes Concrete Floors to Sink

A number of things may cause the slab concrete to sink. Frequently, minor miscalculations or poor preparation when the floor was installed can cause recesses and sinking: foundation materials need to be compacted and reinforced before concrete slab floors are laid. Other reasons can include soil beneath the slab settling improperly or in unanticipated ways. Improper drainage or changes in grades around a property can also impact the soil underneath and on the periphery of concrete floors by exposing them to water and erosion. Without solving for these underlying – pun perhaps intended – problems, efforts to raise the garage floor will be a temporary solution that will require repeating.

Why It’s Urgent to Repair a Sinking Garage Floor

Settling and sinking garage floors can crack, present tripping hazards, and even alter the grade of the structure. Mechanical elements that depend on even surfaces, such as garage and entry doors and windows, can fail or sustain damage. This can present a security issue, lead to further damage or both. Exposed egresses in an attached garage can cause noticeable increases in energy costs as well.

What is Slab Jacking?

Slab jacking stabilizes the soil beneath a concrete floor. In slab jacking, a slurry of water, cement, and sometimes polyurethane or foam is piped into voids or hollows in the soil under the concrete floor. This mixture is designed to bind to the soil and dry. Slab jacking is a great deal less expensive and less invasive than replacing a concrete floor. You can use the space as normal almost immediately after you raise the garage floor. It is a highly effective and convenient technique that has been used to raise concrete floors for a hundred years in a wide range of applications, from garage floors to driveways to walkways and beyond. It is quick, cost-effective, and permanent.

How a Concrete Grinding Service Can Benefit You

concrete grinding service

Concrete is the most used substance in the world, more than any other man-made material. But it can be difficult to maintain and repair. Is your concrete flooring a little worse for wear? You can choose to fix it yourself or hire a concrete grinding service to do the job for you. Here is what you need to know about the process and how a concrete grinding service can benefit you.

What is Concrete Grinding?

Concrete grinding removes layers of concrete using a dust suppression system. It is ideal for manufacturing, factory, and warehouse floors. The process uses heavy-duty machines with diamond-impregnated discs resembling sandpaper. During concrete grinding, these discs are replaced with finer grit discs on a gradual basis to create a high polish shine. A polishing compound is then applied to clean up any remaining residue.

Benefits of Concrete Grinding

Concrete grinding can serve a number of purposes. It can be used to prepare concrete for the installation of new flooring or provide better drainage in floors that are uneven. Concrete grinding is also useful for removing old flooring and debris. Polished concrete floors won’t chip and hold up well, especially in high traffic areas. They require little maintenance and are more affordable than some other flooring options.

The use of concrete stains on polished concrete can give an aesthetic appearance similar to that of granite or marble. Concrete grinding is also environmentally friendly for a couple of reasons. It reduces dust and mold and produces a low amount of waste while being installed. The reflective surface can also help reduce lighting costs in large buildings.

How Much Do Concrete Grinding Services Cost?

The current condition of your concrete flooring is one main factor in determining the overall cost. If it is damaged, then the cracks and joints will need to be sealed. Surface repairs typically cost around $2 to $3 per square foot. The more you want your floor to shine, the higher the cost will be because the concrete service will need to go over your floor multiple times. The design of flooring you choose is also a big factor in price. Elaborate designs can cost up to $15 per square foot.

Whether you want to remove surface dirt or replace the entire floor, using a concrete grinding service can help you achieve beautiful and affordable flooring that will last for years to come. This environmentally friendly service will not only help you save time and money but will keep you safe as well in the long run.</p

When To Call For Concrete Crack Repair Services

concrete crack repair

If you’ve got concrete in your home as part of your basement construction, foundation, garage floor, or elsewhere, proper maintenance is a must-have. Without taking care of your home’s concrete, you could potentially end up with cracks. Concrete crack repair services are available if you’ve already noticed some damage in your home or are looking to make home repairs in addition to your concrete. Here are just a few common signs that it might be time to call a professional about concrete crack repair services.

Cracks In Structural Areas

Not all concrete damage and cracks are created equal. While cracks in concrete anywhere can be a problem, the ones to ultimately prioritize are the cracks that could impact structural integrity. Due to concrete’s excellent durability and performance, polished concrete flooring has quickly become a popular alternative to marble, granite, tile and linoleum for many commercial facilities. Cracks in flooring can be serious, but cracks in a foundation or load-bearing wall are issues to address as soon as possible.

Signs Of Water Damage

Depending on the location of the concrete damage, it’s possible that it could be allowing water into your home or place of business. A little bit of water might not necessarily seem like an issue, but water damage can quickly become serious and damage the structure of your home or workplace. If you can trace signs of water damage back to cracks in concrete, call for concrete crack repair services as soon as you’re able.

Preventive Maintenance

Sometimes you might come across a crack in concrete that doesn’t seem terribly serious at the moment. Maybe it’s a small hairline crack in your garage’s floor, or you remember a particular issue that caused the damage. Even if the crack isn’t a structural issue or causing more serious types of damage, it’s still important to get it taken care of quickly. Fixing a crack in concrete sooner can help avoid more expensive damage later on.

Knowing when to call for concrete repair services can help you protect your home or workplace from serious damage. For more information or to schedule concrete repair, contact Slabjack Geotechnical today.

Fixing Concrete Voids Before They Cause Massive Damage

raise the garage floor

Perhaps you are looking to raise the garage floor. Or maybe you just suspect that there is trouble around the corner with your concrete driveway. Regardless what type of concrete raising or concrete service you are looking to perform, it is important to know how to recognize when you have a potential void in your concrete that would require filling.

What is a Concrete Void?

The first thing to understand is that voids in concrete are not visible. Unlike traditional crack repair (which is very visible), a void in the concrete can build up over time, eventually causing massive damage to the surface of the concrete, requiring large repairs. One of the reasons voids are not detectable by surface damage at first is that concrete is very strong. Average concrete can withstand about 3000 psi (pounds per square inch), and some concrete has a strength of over 20,000 psi. Because of this, the concrete will withstand enormous amounts of pressure and stress, until eventually the entire slab just cracks. When it does crack, the crack is usually massive.

The most high-tech solution is to use a GPR, or ground penetrating radar. GPRs are used by contractors to detect voids or holes under a concrete slab. If you are looking to raise the garage floor, it could be because you have a void in your concrete. Garage floor voids are difficult to detect without a GPR. Without a GPR, you might be able to detect a void by driving into your garage and listening to see if you can hear a shallow or hollow sound as you drive over the concrete. Sometimes there will also be tiny cracks throughout the concrete, or sometimes you will be able to detect a shift or tremor in the concrete. All of these are signs that you should look to raise the garage floor and fill the void.

How to Fill Concrete Voids

Filling concrete voids can be tricky. Because the void typically isn’t accessible through a visible crack (yet), there are only a couple of options. For small slabs, such as a sidewalk, it is possible to pack under the slab with gravel or some other material to keep the void from damaging the concrete. For larger slabs, such as a patio or garage, this isn’t usually an option.

One of the best methods for large slabs is to use some sort of expanding polymer substance, such as Polyurethane. Polyurethane can travel several feet through openings on the side of your slab to find and fill the voids underneath. This can sometimes be enough to prevent any further damage to the slab, even if you are looking to raise the garage floor.

When to Hire a Professional

Concrete can be expensive, and so is fixing it. Sometimes, because of the nature of a slab (especially in a garage), it can be difficult to access places where you can easily fill a void using Polyurethane or another expanding substance. Even if you want to raise the garage floor, you will need to fill the voids underneath in order to ensure good concrete strength and durability. There are plenty of options for slab jacking and soil cement stabilization that can be done professionally to ensure that your concrete is secure and solid for years to come.

Heaved concrete


Some of the communities we serve have an abundance of concrete that is heaved, primarily by roots.

What can be done?

There are really just two approaches to this problem other than ignoring and accepting liability.

-We can raise adjacent slabs to create a transition up and over the root, in effect a ramp. This is the easiest and least costly but may need to be redone as the root continues to grow.

-We can remove that section of concrete, cut out the root and replace the concrete. While more costly this will generally be a permanent solution. If this is the method you choose we advise contacting an arborist about the potential consequences of removing the root.

-There is one other option that preserves the root and may give years of trouble-free growth. We will remove the concrete and place half a pipe or other material over the root then pour new concrete on top of the pipe. This allows some room for growth, typically a decade or so before heaving resumes.

Thinking outside the box is something we do, let’s solve your concrete problems, call today,



Superior technology, Superior polymers, Superior results.


Quality concrete


Much of the concrete we are asked to raise was not poured on properly prepared soil nor was any internal structural support used, what do we mean?

Most  concrete is simply poured on whatever type of soil is there with little quality control other than trying to make the finish look good. “Skin deep” quality.

First, it is important to consider what the concrete will be poured on. If it will be clay then as the soil gains and then looses moisture the movement of the slab will cause cracking. Clay can expand as much as ten percent. If it is soil with organic material then as the material breaks down settling will occur.

The solution to much of the settling is properly prepared soil. Compaction along with a barrier material, 4-6″ of gravel, preserves the concrete to a large degree.

Further, reinforcing the concrete with a grid of re-bar or wire mesh protects the slab against excessive movement even if it does fracture.

Demand quality from your concrete contractor and avoid problems later.

If your concrete is settling call us today,



Superior technology, Superior polymers, Superior results.



Does Slabjack Geotechnical do concrete replacement?


“do you do concrete replacement”?

1-855-752-2522 prides itself as the most trusted and experienced concrete raising company in Eastern and Central Washington.

While we generally refer concrete replacement to other qualified contractors there are circumstances where we will replace a small slab in order to facilitate the larger concrete raising job.

Occasionally an area will be in good shape other than some settling, but one section of a slab is pitched by a tree root or damaged beyond being able to lifted. Rather than replacing the entire patio, for example we will replace a small section, typically less than twenty square feet.

If larger sections than this need to be replaced we will refer you to one of the many quality concrete contractors in your area.

If you are dealing with the effects of settled concrete, but have a section that you feel is beyond repair call the concrete raising professionals today, we may be able help.


Superior technology, Superior polymers, Superior results.

How thick should concrete be?


Most settled concrete, with a number of cracks in it, has a couple of things in common; it doesn’t have any steel in it (rebar or wire mesh) and it is four inches thick or less.

Concrete has incredible compressive strength making it able to hold tremendous weight but does not have good tensile strength (it doesn’t like to flex) Slabjacking, or concrete lifting, places concrete in a vulnerable position because of its inherent weakness to crack when placed under a dynamic load.

Overcoming this weakness is best accomplished two ways; First, concrete slabs five to six inches thick have a much greater chance of staying in tact when placed under tensile load than do slabs three or even four inches thick. Since concrete is inexpensive, adding two more inches is a very cost-effective way to strengthen its ability to withstand flexing. Second, using an internal structure such as wire mesh, rebar or post tension cables, supports concrete as it flexes limiting movement, and, if a crack develops, limits any vertical differential between the two sides of the crack.

If you are dealing with sunken and settled concrete call the concrete raising professionals today.


Superior technology, Superior polymers, Superior results

The cost of concrete replacement



Concrete is one of the most durable materials in existence. Concrete was used as a building material as long as two thousand years ago and has incredible compressive strength. The only real drawback with concrete is its tensile strength, in other words it doesn’t like uneven support which results in cracks and settling.

The vast majority of concrete we are asked to raise was simply poured on unprepared soil with little or no compaction, no gravel base, no rebar or wire mesh and sometimes only three inches thick. Why?

Simply put, cost. It costs to compact, it costs to used crushed rock as a base and compact it, it costs to purchase and install rebar or wire mesh. Doing concrete as cheaply as possible verses doing it properly can reduce the price nearly in half.

The product, concrete, is inexpensive, about $120 a yard. For a ten by ten patio you only need about a yard and a half of concrete. Crushed rock and re-bar can add another $100 so total materials for a ten by ten patio are roughly $300-$400 The cost on concrete work is primarily labor. For the cheap, dump it on dirt installation? $5 a foot. A quality installation with compaction, gravel, rebar/mesh? As much as $10 a foot which puts that ten by ten patio in the range of $800 for a low-budget job to $1400 for a quality job that will resist settling and look good for decades.

If you are in the market for new concrete hire a concrete contractor that is committed to providing a quality product through and through not just a pretty finish.

For settled concrete call the concrete raising professionals, 1-855-752-2522.



Superior technology, Superior polymers, Superior results.

Should I replace or raise my settled concrete?


The number one thing 1-855-752-2522 does to determine if your concrete is a candidate for raising, is to do a detailed evaluation of  the condition of your slab.  How badly is it cracked?  Is the top peeling off?  What is the condition of adjoining slabs?  These and other factors go into providing a quality estimate.

There is a point where replacement is a better option and we are up front with our clients if this is the case.  Better to retain a friend than have a dissatisfied client. If there are numerous cracks, if the top is deteriorating (spalling) and has effected the structural integrity of the slab it is likely time for replacement.

Now, the advantages of Slabjacking; raising settled concrete allows you to retain a consistent look, you won’t have new, light colored slabs, clashing with older darker slabs.  Concrete raising is quick, typically an hour or two to complete a job verses several days with replacement.  Concrete raising is much less costly, typically 1/3 to 1/2 the cost of replacement or less, finally concrete raising is much less disruptive to your landscaping than replacement, the operation is simple; drill, inject, patch. No heavy equipment, no mud or mixers, just a hose extended from our state of the art trailer through which we inject a patented, hydrophobic, (waterproof) geo-polymer that fills voids, compresses loose soils and gently expands raising your settled concrete back to original grade.

At 1-855-752-2522 our goal is to make it as easy as possible to do business with us. We provide no cost, no pressure estimates, professionally prepared with pictures and explanations so you will know exactly what to expect when we arrive on site. From Spokane  and northern Idaho to the Cascades, from Yakima to the Tri-Cities, call today for a no cost, no obligation quote to have your settled concrete raised back to original grade.


Superior technology, Superior polymers, Superior results.