Concrete Slab Leveling

By Amanda Lutz | January 18, 2024

Mason leveling and screeding concrete floor base with square trowel in front of the house.

If the foundation of your house settles into the ground unevenly, the concrete slab underneath it may become uneven and lead to sinking, cracking, or shifting. If the slab isn’t repaired, it could cause structural damage to your home and leave you with costly foundation repairs and unsafe living conditions. Concrete slab leveling is an efficient way to repair the foundation before it becomes a larger problem or requires a new slab replacement. This article details what causes uneven concrete slabs, the signs that your foundation may be off-level, and the solutions to fix the issue.

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Causes of an Uneven Concrete Slab

It can be unsettling when you learn your concrete foundation is cracking or sinking. Here are a few causes of concrete slab unevenness:

Signs of an Uneven Concrete Slab

Your concrete slab foundation won’t experience severe damage right away. If you notice any of the following signs, you may have a larger foundation problem.

Leveling Methods

Here are a few repair methods to correct an off-balance slab:

Prevention Strategies

If you want to prevent your concrete slab from shifting and avoid costly foundation repairs, consider implementing the following strategies:

Professional Assistance

You can take the do-it-yourself (DIY) approach to concrete repair, but you may need professional assistance in certain cases. Concrete lifting requires special tools and experience, which a reputable contractor can provide, and landscaping companies can grade your soil if you need help changing the slope of your yard to direct water away from underneath the slab.

Our Recommendation

Finding an uneven concrete slab is concerning, whether it’s your garage floor, basement slab, pool deck, or concrete driveway. Not only can it be a tripping hazard, but it can lead to structural damage and costly repairs. We recommend you hire a professional to fix a sinking or cracked concrete slab if you don’t have much DIY experience and need more than a self-leveling compound. Severe sinking may also require professional assistance, especially if you need a new concrete replacement or have to perform slab jacking.

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Concrete Slab Leveling FAQ

Is concrete leveling worth it?

Concrete leveling is worth it, especially if your concrete slab is still intact. It’s more cost-effective to level it than to replace a sunken concrete slab.

Why is it important to level a concrete slab?

It’s important to level a concrete slab because it helps to maintain a foundation’s structural integrity. A concrete slab can crack or sink if it remains uneven.

What is the easiest way to level a concrete slab?

The easiest way to level a concrete slab is by using a liquid floor underlayment, which is a cement-based mixture. Pour the liquid cement mixture over your existing concrete floor and allow it to spread, even out, and dry on its own.

What is the most cost-effective way to level a concrete slab?

On average, the national concrete leveling cost is around $1,500—the total price will depend on the square footage of your home and the leveling method you use.* The most cost-effective way to level a concrete slab is by applying a self-leveling compound over the existing concrete. You can also use liquid floor underlayment to fix minor irregularities in the slab. You can purchase both items online or at a local home improvement store.
*Cost data via HomeAdvisor.