How to Fix Uneven Garage Floor

Your garage floor is not level. You don’t know what to do about it. You’ve tried concrete leveling compound, and that didn’t work. You don’t know how to fix uneven garage floor. Don’t worry; you’re not alone! In this blog post, we will show you the best way to fix an uneven garage floor without spending a lot of money. Read on to learn more!

How to Fix Uneven Garage Floor

Summary: To fix an uneven garage floor, start by cleaning the surface thoroughly to remove any debris. Use a concrete patching compound or self-leveling concrete to fill in any low areas or gaps in the floor. Apply the compound evenly and use a trowel to smooth it out. Allow it to dry completely before sanding down any high spots with a concrete grinder.

Why It’s Important to Fix Uneven Garage Floor?

There are many benefits to fixing an uneven garage floor. First and foremost, an uneven surface can be a major safety hazard, as it can lead to the formation of trip hazards or even more serious accidents. Additionally, an uneven surface can make it difficult to store large items in the garage, such as cars or heavy exercise equipment.

Finally, an uneven garage floor can also cause damage to vehicles over time as a result of lower ground clearance due to bumps and valleys. Thus, homeowners can improve their safety and convenience by taking steps to fix an uneven garage floor and help protect their valuable investments like their vehicles.

And ultimately, when it comes down to it, who wouldn’t want a safer, more functional garage?​

How to Fix Uneven Garage Floor Step by Step Guide

Step 1: Safety Precautions

Before you begin fixing an uneven garage floor, it’s important to take safety precautions. Ensure you have appropriate personal protective equipment, such as safety goggles, gloves, and a dust mask, to protect yourself from dust and debris. Additionally, clear the garage of any vehicles, tools, or equipment to create a safe and unobstructed work area.

Step 2: Assess the Floor

Thoroughly inspect the garage floor to identify the areas that are uneven or have significant cracks. Look for any sunken or raised portions of the concrete slab. Pay attention to the severity and extent of the unevenness to determine the best course of action for repair.

Step 3: Prepare the Surface

Before you can address the unevenness, prepare the surface of the garage floor. Start by cleaning the floor thoroughly to remove any dirt, debris, or loose particles. Use a broom or a vacuum to sweep the floor, and if necessary, wash it with mild detergent and water. Allow the floor to dry completely before proceeding to the next step.

Step 4: Leveling Compound

For minor unevenness or shallow depressions, a self-leveling compound can be used to achieve a smooth and level surface. Prepare the self-leveling compound according to the manufacturer’s instructions. Typically, you mix the compound with water and stir until it forms a smooth and pourable consistency.

Step 5: Apply the Self-Leveling Compound

Pour the self-leveling compound onto the uneven areas of the garage floor. Start at one end and work your way towards the other, using a trowel or squeegee to spread the compound evenly. Use a long-handled push broom to further spread the compound and ensure it reaches all the low spots. Work quickly, as the compound sets rapidly. Follow the manufacturer’s guidelines regarding drying time and thickness of application.

Step 6: Leveling and Smoothing

Once the self-leveling compound is applied, use a long-handled trowel or a concrete float to level and smooth the surface. Work in a back-and-forth motion to distribute the compound evenly and eliminate any air bubbles or excess material. Pay extra attention to the edges and corners to ensure a seamless transition with the rest of the floor.

Step 7: Allow the Compound to Cure

After leveling and smoothing the surface, allow the self-leveling compound to cure completely. This typically takes 24 to 48 hours, but refer to the manufacturer’s instructions for specific drying times. Avoid walking or placing any weight on the repaired areas during the curing process.

Step 8: Address Major Unevenness or Cracks

If the unevenness or cracks on the garage floor are more severe, a different approach may be required. For large cracks or significant depressions, consider using a concrete patching compound. Follow the manufacturer’s instructions to mix the patching compound and apply it to the damaged areas. Use a trowel or putty knife to smooth and level the compound, ensuring it fills the cracks or depressions completely.

Step 9: Finishing Touches

Once the patching compound has dried and cured according to the manufacturer’s instructions, you can further refine the repaired areas. Use fine-grit sandpaper or a concrete rubbing stone to smooth out any rough edges or imperfections. This will help blend the repaired areas with the surrounding floor surface.

Step 10: Sealing the Floor (Optional)

To enhance the durability and appearance of the garage floor, consider applying a concrete sealer. A concrete sealer helps to protect the surface from stains, moisture, and further damage. Select a sealer suitable for garage floors and follow the manufacturer’s instructions for application. Apply the sealer evenly on the entire garage floor using a roller or sprayer. Allow the sealer to dry completely before using the garage.

Step 11: Regular Maintenance

To maintain the integrity of the repaired garage floor and prevent future unevenness, it’s important to implement regular maintenance practices. Clean the floor regularly to remove dirt, debris, and any potential substances that could damage the surface. Use a broom or vacuum to remove loose particles, and consider washing the floor with mild detergent and water periodically.

Inspect the garage floor periodically to identify any signs of new cracks or unevenness. Address these issues promptly to prevent them from worsening and causing further damage. Additionally, consider applying a concrete floor coating or epoxy paint to provide an extra layer of protection and improve the aesthetics of the floor.

Step 12: Preventative Measures

To minimize the risk of future unevenness in the garage floor, take preventative measures. Ensure proper drainage around the garage to prevent water accumulation, as water can contribute to the deterioration of the concrete. Keep gutters and downspouts clear to direct water away from the garage.

Avoid placing heavy or sharp objects directly on the garage floor, as they can cause damage and lead to unevenness. Use furniture pads or mats to protect the floor from heavy equipment, vehicles, or tools.

Step 13: Seek Professional Help (If Needed)

If the unevenness or damage to the garage floor is extensive or beyond your level of expertise, it is advisable to seek professional help. A qualified contractor or concrete specialist can assess the condition of the floor and provide professional repair services. They have the knowledge, experience, and equipment to address complex issues and ensure a long-lasting solution.

In conclusion, repairing an uneven garage floor is achievable with the right approach and materials. By following these steps, you can address minor unevenness with self-leveling compound and more severe damage with a concrete patching compound. Regular maintenance and preventative measures can help maintain the integrity of the floor and prevent future issues. However, for significant damage or if you’re unsure about the repair process, it’s recommended to consult a professional for guidance and assistance.

When Do You Need To Fix The Uneven Garage Floor

1. Garage Floor Tilting Towards The House

If your garage floor is tilting towards the house, there could be a structural issue with your foundation or the ground underneath. To address this, you may need to enlist the help of a professional contractor to assess and repair any issues with the foundation.

2. Gaping Garage Door

A gaping garage door is a more obvious issue than an uneven garage floor, but it can be easy to fix. Whether your garage door has been damaged due to harsh weather or your spring system is not working correctly, there are several steps you can take to address the problem and restore your garage door to its proper functionality.

3. When Critical Services Are Affected

If your business relies on the garage for storage or parking, you need to make sure that the floor is level. Uneven surfaces can cause accidents and damage vehicles. If you have a home workshop in your garage, an uneven floor can also make it difficult to use power tools and work on projects.

What Causes Garage Floors To Crack?

1. Shrinkage

If your garage floor is composed of concrete, it may start to crack and buckle over time due to shrinkage. This occurs when the concrete begins to lose moisture as it cures, causing the top layer of the pavement to contract and pull away from the underlying layers.

 Your Garage Floor Is Composed of Concrete

2. Poor Installation

One of the most common causes of cracked garage floors is poor installation. In particular, if your concrete contractor fails to compact the soil beneath the slab properly, this can lead to uneven settling over time and cracks.

3. Foundation Problems

Another potential cause of cracked garage floors is underlying issues with the foundation or structure of your home. If your foundation is uneven or has cracks in it, this could cause your garage floor to become uneven. To fix this issue, you may need to contact a professional foundation repair company that can assess the situation and make any necessary repairs.

4. Tree Roots

If there are trees near your garage, their roots can grow under the floor and cause it to crack. To prevent this, you should be sure to properly maintain your trees and keep the area around them clear of overgrown weeds and other vegetation.

5. Poor Drainage

Over time, your garage floor can develop cracks due to poor drainage. Overhead water that is not properly drained can penetrate the subfloor and concrete slab, causing unevenness in the garage surface.

6. Settlement of Slab

If your garage is built on top of a slab foundation, it is important to know that slabs are prone to settling over time. As the ground beneath them shifts or settles, this can cause cracks in the surface of your garage floor.

How Do I Know if My Garage Floor Is Level?

When it comes to your garage floor, ensuring that it is level is essential for your safety and the safety of your vehicles. A level floor will help prevent dangerous and unsightly puddles of water from forming, reducing the risk of slipping and breakage due to periodic flooding.

Additionally, a level surface makes it easier to park and easily move your car around in the garage. So how do you know if your garage floor is level? Several methods can be used, such as using a bubble level or employing specialized tools designed specifically.

No matter which technique you choose, taking the time to ensure that your garage floor is level is always worth the effort in the long run. Keep reading for more information about how to fix uneven garage floor.

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Frequently Asked Question

Which Type of Adhesive Should I Use to Fix My Uneven Garage Floor?

Many types of adhesives can be used to fix an uneven garage floor. A latex-based adhesive such as PL Premium may work if the floor is only slightly uneven. If the floor is more severely uneven, a mortar-based adhesive such as Mapei Kerabond may be required.

 Use for Leveling a Garage Floor

What Tools Should I Use for Leveling a Garage Floor?

A few tools can be used for leveling a garage floor. A shovel, rake, or hoe can move gravel, dirt, or sand to fill in low spots. A trowel can be used to smooth out the surface.

How Can I Protect My Car from Scratches on The Uneven Garage Floor?

One way to protect your car from scratches on the uneven garage floor is to place a carpet or rug down on the ground. This will create a softer surface for your car to rest on and help avoid any damage that the unevenness of the floor may cause.


Garage floor repair is a fairly simple process that anyone can do with the right tools and some basic know-how. By following the steps in this guide, you should be able to fix your uneven garage floor in no time. Have any questions about the process? Leave us a comment below, and we’ll help you out. Thanks for reading our post about how to fix uneven garage floor.

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Rick Kelly

I am Rick. I grew up helping my dad with his handyman service. I learned a lot from him about how to fix things, and also about how to work hard and take care of business. These days, I'm still into fixing things- only now, I'm doing it for a living. I'm always looking for new ways to help people grow and develop. That's why I have created this blog to share all my experience and knowledge so that I can help people who are interested in DIY repair.

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