Leveling a concrete floor involves the process of creating a smooth and even surface by removing highs and filling in lows. This is typically done to prepare the floor for the installation of new flooring materials. Whether you’re renovating your home or preparing a commercial space, a level floor is essential for a polished and professional finish.
The need to level a concrete floor may arise due to various factors such as uneven settling, cracks, or damage to the existing concrete. It is especially crucial to level the floor before installing flooring materials like tiles, hardwood, or laminate, as these materials require a flat and stable surface to ensure proper installation and prevent damage in the long run.
To level a concrete floor effectively, you will require specific tools and equipment. These include a concrete grinder to remove high spots, a self-leveling compound to fill in low areas, a trowel for spreading and smoothing the compound, a leveling screed for larger areas, a spirit level for accurate measurements, and a measuring tape to ensure precise leveling.
Different techniques can be employed depending on the severity and nature of the unevenness. This can involve grinding high spots using a concrete grinder, applying a self-leveling compound to even out low areas, or applying a leveling screed for larger surface areas.
While leveling a concrete floor, it is essential to take precautions and follow specific tips to ensure a successful outcome. These include checking for moisture issues to prevent future damage, removing any loose or damaged concrete, thoroughly cleaning and preparing the surface, and carefully following the instructions provided by the leveling product manufacturer.
By understanding the process of leveling a concrete floor and using the appropriate tools and techniques, you can achieve a smooth and level surface, providing a solid foundation for your new flooring and ensuring a professional and visually appealing result.
Leveling a concrete floor maximizes functionality: A level surface is essential for the proper installation of flooring materials and ensures a smooth and stable foundation.
Tools and equipment for leveling a concrete floor: Concrete grinder, self-leveling compound, trowel, leveling screed, spirit level, and measuring tape are necessary tools for the process.
Techniques for leveling a concrete floor: Grinding high spots, using a self-leveling compound, and applying a leveling screed are common techniques used to achieve a level surface.
What Does it Mean to Level a Concrete Floor?
Leveling a concrete floor involves making the surface smooth and even. It is the process of removing any uneven areas or imperfections in the concrete to create a flat and level surface.
To level a concrete floor, you need to follow several steps:
1. Assess the floor: Start by examining the concrete floor to identify any areas that need to be leveled. Look for cracks, dips, or uneven spots that may require attention.
2. Prepare the floor: Before leveling, clean the floor by removing any debris or loose materials. Repair any cracks or damage to ensure a stable surface for leveling.
3. Use a self-levelling compound: Apply a self-levelling compound to the floor. This compound is a liquid mixture that is poured onto the floor and spreads out to fill in any low spots or uneven areas. It self-levels and dries into a smooth surface.
4. Level the compound: After pouring the self-levelling compound, use a trowel or a levelling tool to spread and smooth the compound evenly across the floor. Ensure it fills in all the low areas and creates a level surface.
5. Allow the compound to dry: The drying time for the self-levelling compound may vary depending on the product used. Follow the manufacturer’s instructions for the recommended drying time.
Once the compound is dry, the concrete floor should be level and ready for further treatments or finishes, such as epoxy coatings or tile installations.
Leveling a concrete floor means making it flat and even by removing any uneven areas or imperfections. Following the steps mentioned above will help you achieve a smooth and level surface for your flooring needs.
Why Would You Need to Level a Concrete Floor?
Leveling a concrete floor is necessary for several reasons.
An uneven concrete floor can pose safety risks, especially in areas with high foot traffic. Tripping hazards can lead to accidents and injuries. Therefore, it is crucial to ensure that the surface is flat and level to prevent any potential accidents.
A level concrete floor provides a stable foundation for any subsequent flooring or construction work. If the floor is not level, it can cause problems when installing tiles, wood flooring, or other materials. Uneven surfaces can result in gaps, cracks, or a generally poor aesthetic appearance.
Leveling a concrete floor improves the functionality of the space. An uneven floor can lead to furniture wobbling or doors not closing properly. By leveling the floor, you can create a level and stable surface for all activities in the space.
Leveling a concrete floor can enhance the value of a property. Potential buyers or renters are likely to be deterred by a lumpy or uneven floor. A level floor adds to the visual appeal of the space and can increase the overall value of the property.
In summary, there are several reasons why you would need to level a concrete floor: to ensure safety, provide a stable foundation, improve functionality, and enhance the value of a property.
Is It Necessary to Level a Concrete Floor Before Installing Flooring?
It is necessary to level a concrete floor before installing flooring for several reasons.
An uneven floor can lead to problems with the installation and performance of the flooring material. If the floor is not level, it can cause the flooring to sit unevenly, resulting in an unstable surface and potential damage to the flooring material over time.
Leveling the floor helps to provide a smooth and even surface for walking and other activities. This is particularly important for areas with heavy foot traffic or where furniture and equipment will be placed. A level floor ensures a safe and comfortable environment for occupants.
Leveling the floor can prevent moisture issues. A level floor helps to create a barrier against water or moisture from seeping into the flooring material. Moisture can cause damage to certain types of flooring, such as hardwood or laminate, leading to warping, mold growth, and other issues.
To level a concrete floor before installing flooring, tools and equipment such as a concrete grinder, self-levelling compound, trowel, levelling screed, spirit level, and measuring tape are needed. Techniques like grinding high spots, using a self-levelling compound, and applying a levelling screed can be employed to achieve a smooth and level surface.
It is necessary to level a concrete floor before installing flooring to ensure proper installation, create a safe and comfortable environment, and prevent moisture issues. By following the appropriate techniques and using the necessary tools, a smooth and level surface can be achieved for the successful installation of flooring materials.
Tools and Equipment Needed for Leveling a Concrete Floor
To prepare for levelling your concrete floor, this section will discuss the necessary tools and equipment for achieving a smooth and flawless surface. The versatile concrete grinder and the handy self-levelling compound are essential tools that play a crucial role in transforming your floor. Additionally, having the trusty trowel, levelling screed, spirit level, and measuring tape in your arsenal will ensure that you are well-equipped to tackle this project with confidence. Let’s now explore the key players that will bring your concrete floor to perfection.
1. Concrete Grinder
When it comes to levelling a concrete floor, a concrete grinder is a key tool that is commonly used. Here are some important points to consider about concrete grinders:
A concrete grinder is a powerful tool used to smooth and level the surface of a concrete floor. It is equipped with rotating diamond discs that grind away uneven areas and high spots on the floor.
Concrete grinders come in different sizes, ranging from small hand-held machines to larger walk-behind models. The size of the grinder you choose depends on the scale of the project and the surface area that needs to be levelled.
Using a concrete grinder requires proper safety precautions. It is essential to wear protective clothing, including goggles, gloves, and a dust mask, to avoid any potential hazards associated with the grinding process.
Before using a concrete grinder, it is important to prepare the area by removing any furniture, debris, or loose concrete. This ensures that the grinder can effectively work on the surface without any obstructions.
When operating the concrete grinder, it is crucial to maintain a steady and even pressure. This helps to achieve a consistent and smooth finish across the entire surface of the floor.
After using the concrete grinder, it is recommended to thoroughly clean the area to remove any dust or debris that may have been generated during the grinding process.
A concrete grinder is an essential tool for levelling concrete floors. By using this powerful machine and following the proper techniques, you can achieve a smooth and even surface for various applications such as installing flooring. Make sure to prioritise safety and take the necessary precautions when using a concrete grinder.
2. Self-leveling Compound
A self-levelling compound is a type of flooring material used to level out uneven concrete surfaces before installing new flooring. It is a versatile product with several benefits and can be easily applied. Here are some important aspects to consider when working with a self-levelling compound:
Mixing: Self-levelling compounds come in powder form and need to be mixed with water according to the manufacturer’s instructions. The mixing ratio is usually specified on the packaging.
Preparation: Before applying the compound, the concrete surface should be thoroughly cleaned and free of any dust, debris, or grease. It is important to repair any cracks or holes in the concrete before applying the compound.
Application: The compound is poured onto the floor and spread out using a trowel or a gauge rake. It will automatically level itself and fill in any low spots or uneven areas. To ensure a smooth and even surface, it is recommended to follow the manufacturer’s guidelines regarding the thickness and application technique.
Drying and Curing: After application, the compound needs time to dry and cure. The drying time can vary depending on factors such as humidity and temperature. It is essential to allow sufficient drying time before proceeding with the installation of the new flooring.
Sanding and Finishing: Once the compound is fully cured, the surface can be sanded if necessary to remove any imperfections or rough areas. After sanding, the floor is ready for the installation of the desired flooring material.
Using a self-levelling compound is an effective way to create a level and smooth surface for your new flooring. It is crucial to carefully follow the instructions provided by the manufacturer to ensure the best results.
When leveling a concrete floor, a trowel is an essential tool used to spread and smooth the leveling compound. It helps to achieve a level surface by evenly distributing the compound across the floor.
The trowel is used to spread and smooth the leveling compound on the concrete floor. Its flat, rectangular blade allows for precise application and even distribution of the compound.
Using the trowel, one can carefully handle the leveling compound, ensuring that it is applied evenly across the floor. The trowel allows for control and precision in creating a smooth and level surface.
It is important to note that using a trowel requires skill and technique. One must work efficiently to spread the compound before it starts to dry. It is also crucial to maintain a consistent pressure and angle while using the trowel to ensure an even and polished finish.
By incorporating the trowel in the leveling process, one can effectively create a flat and even surface, which is essential for various flooring installations or as a base for other construction projects. The trowel is an indispensable tool for achieving a smooth and level concrete floor.
4. Leveling Screed
The leveling screed is an essential component in the process of leveling a concrete floor. It is responsible for creating a smooth and even surface, which is necessary for the proper installation of flooring materials. Here are some key points to know about the leveling screed:
The leveling screed is a cementitious product that is used to fill in any low spots or depressions on the concrete floor.
Typically, it is composed of a mixture of cement, sand, and water.
A trowel or a similar tool is used to apply the screed evenly across the floor.
It is crucial to ensure that the leveling screed is mixed to the correct consistency, as this will impact its ability to level the floor effectively.
The thickness of the leveling screed can vary depending on the condition of the floor and the desired level of smoothness. Generally, it is applied with a thickness of approximately 10-40mm.
After applying the leveling screed, it must be allowed to dry and cure before proceeding with the installation of any flooring materials.
It is important to carefully follow the instructions provided by the manufacturer when using a leveling screed, as different products may have specific requirements or drying times.
Once the leveling screed is completely dry, it is necessary to inspect the floor for any remaining unevenness or imperfections. These can be rectified by applying additional layers of the leveling screed if needed.
The leveling screed is an essential step in achieving a smooth and level concrete floor, ensuring the success of any flooring installation.
5. Spirit Level
When levelling a concrete floor, a spirit level is an essential tool that helps ensure accuracy and precision. Here are some important points to consider about the use of a spirit level:
A spirit level, also known as a bubble level or a carpenter’s level, is a tool used to determine if a surface is horizontally level or vertically plumb.
The spirit level consists of a long, rectangular body with a transparent vial in the middle filled with liquid and an air bubble. The air bubble moves to the centre of the vial when the surface is level.
To use a spirit level, place it on the concrete floor and adjust the floor’s elevation until the air bubble is centred within the vial.
The accuracy of the spirit level is crucial for getting a level surface. Ensure that the spirit level is in good condition and free from any damage that may affect its accuracy.
It’s important to check the level at multiple points across the surface to ensure consistency. By checking different areas, you can identify any high or low spots that may need further levelling.
When using a spirit level, take into account the specific requirements for the project. Different flooring materials may have different tolerances and levelness requirements.
Always follow the manufacturer’s instructions for using the spirit level and any additional tools or techniques required to achieve a level concrete floor.
By utilising a spirit level, you can ensure that your concrete floor is level and ready for further construction, avoiding any issues that may arise from an uneven surface.
6. Measuring Tape
In the process of levelling a concrete floor, one essential tool is a measuring tape. This tool is crucial for accurately measuring the dimensions of the floor and checking for any inconsistencies.
To achieve a smooth and level surface, follow these steps using a measuring tape:
Measure the length and width of the concrete floor to determine its size. This will help you calculate the amount of levelling compound or levelling screed required.
Use the measuring tape to check for any uneven areas or deviations from the desired level. Measure the height difference between the highest and lowest points to determine the extent of levelling required.
Take measurements across different areas of the floor to identify any low or high spots. This will guide you in determining the areas that need grinding or application of levelling compound.
When applying a levelling screed, use the measuring tape to ensure the thickness is consistent across the surface. Measure the depth of the levelling screed at multiple points to confirm it meets the desired level.
Throughout the levelling process, periodically use the measuring tape to double-check the accuracy and progress of your work. This will help you avoid any potential errors or inconsistencies.
By utilising a measuring tape, you can effectively measure, assess, and ensure a properly levelled concrete floor. Always remember to follow the instructions and recommendations provided by the product manufacturers for best results.
Techniques for Leveling a Concrete Floor
Discover effective techniques for levelling a concrete floor. We’ll explore three key methods that will guarantee a smooth and even surface for your flooring project. These methods include grinding high spots, using self-levelling compounds, and applying levelling screed. By mastering these techniques, you will be able to achieve impeccable results. Bid farewell to uneven surfaces and welcome a flawless finish with our expert techniques!
1. Grinding the High Spots
When it comes to levelling a concrete floor, grinding the high spots is an important step. Here is a step-by-step guide on how to effectively grind the high spots:
Start by thoroughly cleaning the floor surface to remove any debris or loose particles.
Identify the high spots on the floor by visually inspecting the surface or using a straight edge or level.
Wear protective gear such as safety goggles, gloves, and a dust mask to protect yourself from the dust created during the grinding process.
Using a concrete grinder, begin grinding the high spots on the floor. Move the grinder in a back-and-forth motion to ensure even grinding. Apply even pressure to the grinder to achieve a smooth surface.
Pay extra attention to the high spots, focusing on grinding them down until they are level with the rest of the floor.
Periodically check the surface with a straight edge or level to ensure that the high spots are being properly ground down.
Continue grinding until the entire surface is smooth and even.
Once the grinding process is complete, clean the floor again to remove any dust or debris.
Inspect the floor to ensure that all high spots have been properly ground down. If any high spots remain, repeat the grinding process.
By following these steps and grinding the high spots on the concrete floor, you can achieve a smooth and even surface, making it ready for further leveling or flooring installation.
2. Using a Self-leveling Compound
To level a concrete floor, the use of a self-levelling compound is an efficient and effective method. The following steps should be followed when using a self-levelling compound:
Surface preparation: Thoroughly clean the concrete floor, removing any dirt, dust, or debris. Repair any cracks or damage on the surface using an appropriate filler.
Priming the floor: Apply a primer to the concrete floor to enhance adhesion and ensure a smooth finish. Adhere to the manufacturer’s instructions for the specific primer being used.
Mixing the self-levelling compound: Prepare the self-levelling compound as per the manufacturer’s instructions. Use a clean bucket and mix it with water until a smooth, pourable consistency is achieved.
Pouring the compound: Begin at one corner of the room and pour the self-levelling compound onto the floor. Use a trowel or rake to evenly spread the compound across the surface, working towards the opposite end of the room. Avoid pouring excessive compound to prevent pooling.
Spreading and smoothing: Once the compound is poured, utilise a smoothing tool, such as a smoothing trowel or squeegee, to spread and level the compound evenly. Work quickly before the compound starts to set.
Allowing curing: Follow the manufacturer’s instructions for the curing time of the self-levelling compound. Typically, it takes several hours, but it is advisable to wait at least 24 hours before walking on the floor or installing any flooring material.
Suggestions for using a self-levelling compound:
Ensure proper ventilation in the room during the application and curing process.
Use a self-levelling compound that is suitable for your project’s specific conditions and requirements.
Carefully follow the manufacturer’s instructions for preparing and applying the compound.
It is crucial to wear protective gear, including gloves and goggles, while working with self-levelling compounds.
Regularly check the progress of the levelling process to ensure a smooth and even surface.
By following these steps and suggestions, you can successfully level a concrete floor using a self-levelling compound, achieving a smooth and level surface for your desired flooring application.
3. Applying a Leveling Screed
When it comes to achieving a smooth and level surface, applying a leveling screed is an important step in the process of leveling a concrete floor. Here is a step-by-step guide on how to apply a leveling screed:
Start by preparing the concrete floor, ensuring that any debris or loose particles are removed. Thoroughly clean the surface using a broom or vacuum cleaner.
Mix the leveling screed according to the instructions provided by the manufacturer. Typically, the screed is a mixture of cement, sand, and water.
Pour the leveling screed onto the concrete floor, beginning at one end of the room and working your way towards the other end.
Evenly spread the leveling screed using a trowel or a straight-edged tool. Be sure to fill in any low spots or uneven areas.
Check the surface for levelness using a level or a straight edge. Adjust the screed as necessary to achieve a smooth and level surface.
Applying a leveling screed is essential for eliminating any imperfections in the concrete floor and creating a strong and even surface for your flooring. By following these steps, you can ensure a smooth and seamless installation.
Precautions and Tips for Leveling a Concrete Floor
Before you dive into the tools and techniques for leveling a concrete floor, it is essential to understand the precautions and tips that will help you achieve a smooth surface. In this section, we will provide you with valuable advice and expert insights to ensure your concrete floor leveling project is successful. From checking for moisture problems to following product instructions, each sub-section will outline important steps. With our guidance, you can say goodbye to bumps and uneven surfaces and achieve the best results.
1. Check for Moisture Issues
A crucial step in levelling a concrete floor is to check for moisture issues. Excess moisture can compromise the integrity of the levelling process and lead to future problems. Here are the steps to follow when checking for moisture issues:
Inspect the concrete surface: Thoroughly examine the floor for any signs of moisture, such as visible water stains or discolouration. Pay attention to areas near windows, doors or plumbing fixtures, as these are common sources of moisture intrusion.
Conduct a moisture test: Use a moisture meter to measure the moisture content of the concrete. Follow the manufacturer’s instructions for accurate readings. A moisture content of less than 4% is generally considered acceptable for most flooring installations.
Perform a plastic sheet test: Cut a plastic sheet and tape it securely to the concrete floor in an area with potential moisture issues. Leave it undisturbed for 24-48 hours. After that, check if there is any condensation or moisture accumulation underneath the plastic. If moisture is present, further investigation or moisture remediation may be necessary.
Consider a professional opinion: If you are unsure about the moisture levels or if the test results indicate a moisture problem, it is recommended to consult a professional for a more detailed assessment and guidance on how to address the issue.
When it comes to moisture issues, prevention is always better than cure. Here are some suggestions to help you avoid moisture-related problems:
Ensure proper drainage around the building foundation to prevent water from seeping into the concrete.
Use vapour barriers, such as epoxy coatings or moisture-retarding underlayments, to minimise moisture transfer from the subfloor.
Control humidity levels in the space by using dehumidifiers or HVAC systems.
Address any plumbing leaks or water damage promptly to prevent moisture from seeping into the concrete floor.
By checking for moisture issues and taking necessary precautions, you can ensure a smooth and successful concrete floor levelling process.
2. Remove any Loose or Damaged Concrete
To properly level a concrete floor, it is important to remove any loose or damaged concrete. Here are the steps you should follow:
Inspect the floor: Carefully examine the concrete surface for any areas that are cracked, chipped, or crumbling.
Mark the damaged areas: Use a marker or chalk to clearly mark the areas that need to be repaired or removed.
Prepare the tools: Gather the necessary tools, including a hammer, chisel, and safety goggles.
Remove loose concrete: Start by gently tapping the damaged areas with a hammer to check for any loose pieces. Use the chisel to carefully remove any loose or damaged concrete.
Clean the area: Once the loose concrete has been removed, clean the area thoroughly to remove any dust or debris.
Evaluate the floor: After the damaged concrete has been removed and the area has been cleaned, assess the overall condition of the floor. If there are any additional areas that need to be repaired, repeat the process.
Dispose of the debris: Properly dispose of the removed concrete chunks, ensuring they are safely discarded.
Proceed with leveling: Once all loose or damaged concrete has been removed, you can move forward with the leveling process using the appropriate tools and techniques.
Fact: Removing any loose or damaged concrete is crucial to ensure a smooth and even surface for your leveled floor. This step helps prevent future issues and ensures a long-lasting and durable result.
3. Clean and Prepare the Surface Properly
When preparing to level a concrete floor, it is important to clean and prepare the surface properly. This will ensure that the levelling process is effective and the end result is a smooth and even floor. Follow these steps:
Start by removing any loose debris or dust from the surface of the concrete floor. Use a broom or vacuum cleaner to thoroughly clean the area.
If there are any stains or spots on the floor, treat them with a suitable cleaning solution. Use a scrub brush or mop to remove the stains and any dirt or grime.
In some cases, it may be necessary to use a pressure washer to clean the surface of the concrete. This can help remove stubborn stains or dirt that cannot be removed by regular cleaning methods.
After cleaning, inspect the surface for any cracks or damage. If there are any, repair them using a suitable concrete repair compound. Follow the manufacturer’s instructions for the best results.
Once the repairs are complete, allow the surface to dry completely before proceeding with the levelling process. This is important to ensure that the levelling compound adheres properly to the concrete.
Before applying the levelling compound, it is recommended to prime the surface. This will enhance bonding and improve the overall effectiveness of the levelling process.
Follow the manufacturer’s instructions to mix and apply the levelling compound. Use a trowel or screed to spread the compound evenly across the surface.
After applying the levelling compound, use a spirit level to ensure that the surface is perfectly level. Make any necessary adjustments to achieve the desired levelness.
By following these steps, cleaning and preparing the surface properly, you can ensure that the floor levelling process is successful and the end result is a smooth and even concrete floor.
4. Follow the Product Instructions
To achieve a smooth surface, it is essential to follow the product instructions carefully when leveling a concrete floor. Here are the steps to follow:
Prepare the floor: Remove any loose or damaged concrete from the surface. Ensure that the floor is clean and free from debris.
Read the product instructions: Carefully review the instructions provided with the levelling product you are using. Understand the recommended application techniques and any specific requirements.
Mix the levelling compound: Follow the instructions for mixing the self-levelling compound. Use the correct ratio of water to compound to achieve the desired consistency.
Pour the compound: Begin pouring the levelling compound onto the floor, following the manufacturer’s guidelines. Work in small sections, gradually covering the entire area that needs levelling.
Spread and smooth: Use a trowel or a levelling screed to spread and smooth out the compound. Work quickly but carefully to ensure an even and level surface.
Check for bubbles or low spots: While the compound is still wet, use a spirit level to check for any bubbles or low spots. Address any uneven areas immediately by adding more compound or levelling it with a trowel.
Cure and dry: Allow the compound to cure and dry according to the product instructions. This will usually involve a waiting period of several hours or even days.
Inspect the surface: Once the floor is completely dry, inspect the surface for any imperfections. If necessary, sand down or add more levelling compound to achieve a perfectly smooth and level floor.
By following these steps and adhering to the product instructions, you can successfully level a concrete floor and create a smooth surface for your flooring installation.
Some Facts About Leveling a Concrete Floor: Tools and Techniques for a Smooth Surface:
✅ Self-leveling underlayment is the best choice for installing tile over an in-floor heating system.(Source: Our Team)
✅ Before adding the floor leveler, thoroughly clean the floor by sweeping and vacuuming.(Source: Our Team)
✅ Seal all holes and seams in the plywood with caulk to prevent the liquid leveler from escaping.(Source: Our Team)
✅ Install sill sealer at the walls to keep the liquid underlayment from escaping into other rooms or the basement.(Source: Our Team)
✅ Caulk the sill sealer to the floor to ensure a secure connection.(Source: Our Team)
Frequently Asked Questions
What is the purpose of a wooden border when leveling a concrete floor?
A wooden border is used to contain the concrete during the pouring process, ensuring that it is spread evenly and does not overflow onto adjacent areas.
Why is a subbase layer of sand and gravel necessary before laying a concrete floor?
The subbase layer provides a stable foundation for the concrete, allowing for proper load transfer and preventing uneven settling or structural harm in the future.
What are control joints and why are they important when leveling a concrete floor?
Control joints are periodic cuts made in the concrete to create weakened areas that allow for controlled cracking caused by temperature changes. These joints help prevent unsightly and potentially damaging cracks elsewhere in the floor.
How can I improve the appearance and durability of a concrete floor?
To improve the appearance and durability of a concrete floor, it is recommended to use a screeding tool to create a flat and smooth finish, float the surface to bring the cream to the surface, and cure and seal the concrete using appropriate techniques.
Can I use self-leveling underlayment over an in-floor heating system when installing tiles?
Yes, self-leveling underlayment is the best choice for installing tiles over an in-floor heating system. It provides a level surface while ensuring proper heat transfer and preventing damage to the heating cables.
What precautions should I take when pouring concrete in an older house?
When pouring concrete in an older house, it is important to ensure that the existing floor is clean and free of organic materials. Additionally, any gaps or cracks should be sealed up using an appropriate caulk type. Properly preparing the concrete floor will help prevent uneven pouring and the risk of a big mess.