How Do You Properly Install Laminate Flooring on Concrete?

AvatarByAlison Socha Flooring Materials

Installing laminate flooring on concrete is a popular way to transform a space, combining the durability of concrete with the stylish, warm appearance of laminate. Whether you’re renovating a basement, updating a garage, or simply want a fresh look for your home, laminate flooring offers an affordable and attractive solution. However, laying laminate over concrete requires careful preparation and the right techniques to ensure a smooth, long-lasting finish.

Concrete presents unique challenges compared to wood subfloors, such as moisture concerns and the need for a proper underlayment. Understanding these factors is crucial before beginning your project, as they directly impact the performance and lifespan of your new floor. With the right approach, you can achieve a professional-looking installation that enhances your space and stands up to everyday wear.

This article will guide you through the essential considerations and general process of installing laminate flooring on concrete. By the end, you’ll be equipped with the knowledge to confidently tackle this home improvement project and enjoy the benefits of beautiful, resilient flooring.

Preparing the Concrete Subfloor

Before installing laminate flooring on concrete, it is essential to ensure the subfloor is properly prepared. The concrete surface must be clean, dry, and level to prevent issues such as moisture damage or uneven flooring. Begin by thoroughly cleaning the concrete with a broom or vacuum to remove dust, dirt, and debris. Any existing adhesives, paint, or sealants should be removed using appropriate chemical removers or mechanical methods, as these can interfere with the laminate’s adhesion and stability.

Moisture testing is a critical step because concrete can retain moisture, which may damage laminate flooring over time. Use a moisture meter designed for concrete or perform a plastic sheet test—tape a 2-foot square piece of plastic to the floor and leave it for 24-48 hours. If condensation forms underneath or the concrete darkens, additional moisture mitigation is necessary.

Check for cracks, holes, or uneven areas. Minor imperfections can be smoothed with a concrete patch or leveling compound, but significant damage may require professional repair. The floor should be level within 3/16 inch over 10 feet to ensure proper laminate installation and to prevent locking system failures or gaps between planks.

Installing a Moisture Barrier and Underlayment

Once the concrete subfloor is clean and level, the next step is to install a moisture barrier to protect the laminate flooring from potential dampness. Polyethylene sheets are commonly used for this purpose. Lay the plastic sheeting over the entire concrete surface, overlapping seams by at least 8 inches, and tape the seams securely to create a continuous barrier.

On top of the moisture barrier, an underlayment is installed to provide cushioning, sound absorption, and additional moisture protection. There are different types of underlayments available, including foam, cork, and felt. Choose an underlayment compatible with your laminate flooring and suitable for concrete subfloors. Some underlayments include a built-in vapor barrier, which can simplify the installation process.

  • Roll out the underlayment in the same direction as the laminate planks will be installed.
  • Ensure seams do not overlap; butt edges tightly together.
  • Trim excess material at walls, leaving room for expansion gaps.

Acclimating Laminate Flooring and Expansion Gaps

Laminate flooring should be acclimated to the room’s temperature and humidity conditions before installation. This process typically requires laying the unopened boxes flat in the installation area for 48 to 72 hours. Acclimation minimizes the risk of expansion or contraction after installation, which can cause gaps or buckling.

It is important to leave expansion gaps between the flooring and the walls or fixed objects. Laminate flooring expands and contracts with changes in temperature and moisture, so allowing space for movement prevents damage. Expansion gaps generally range from 1/4 inch to 1/2 inch, depending on the manufacturer’s recommendations and room size.

Tools and Materials Needed

Proper tools and materials streamline the installation process and ensure a professional finish. Below is a list of essential items:

Tools Materials
Measuring tape Laminate flooring planks
Utility knife Moisture barrier (polyethylene sheet)
Tapping block Underlayment
Pull bar Spacers for expansion gaps
Rubber mallet Adhesive or glue (if required)
Level Concrete patch/leveler (if needed)

Having these tools and materials on hand before beginning will help maintain workflow efficiency and reduce errors.

Installing the Laminate Flooring Planks

Begin installing the laminate planks along the longest wall or in a direction that best suits the room’s layout. Place spacers along the perimeter to maintain the required expansion gap. The tongue-and-groove locking system of laminate flooring allows planks to snap together without nails or glue, although some installations may require adhesive depending on the product.

Lay the first row with the tongue side facing the wall, ensuring it is straight and properly aligned. Use a tapping block and mallet to lock planks tightly together without damaging edges. Stagger the seams of adjacent rows by at least 12 inches to enhance stability and appearance.

Continue installing rows, fitting end joints carefully and using a pull bar to close gaps at the far wall. Cut planks to size using a saw or utility knife for fitting around corners or obstacles.

  • Maintain consistent expansion gaps around the perimeter.
  • Check alignment regularly to prevent drifting rows.
  • Use offcuts from previous rows to start new rows when possible.

Preparing the Concrete Subfloor for Laminate Installation

Proper preparation of the concrete subfloor is essential to ensure a durable and visually appealing laminate flooring installation. The following steps outline the key considerations and tasks required before laying laminate on concrete.

Cleaning the Concrete Surface

Begin by thoroughly cleaning the concrete surface to remove all dust, dirt, grease, and debris. This can be done by sweeping and then scrubbing the floor with a mild detergent solution. Allow the floor to dry completely before proceeding.

Checking for Moisture

Concrete slabs are prone to moisture, which can damage laminate flooring. Conduct a moisture test using a reliable moisture meter or the plastic sheet test:

  • Plastic Sheet Test: Tape a 2-foot by 2-foot plastic sheet to the concrete floor, sealing all edges. Leave it in place for 24 to 48 hours.
  • If condensation forms under the plastic or the concrete darkens, moisture is present and must be addressed before installation.

Moisture Mitigation Methods

  • Apply a concrete sealant or moisture barrier recommended for flooring applications.
  • Use a vapor barrier underlayment designed to prevent moisture transmission.
  • Ensure adequate room ventilation and humidity control.

Leveling the Subfloor

Laminate flooring requires a flat surface with minimal variation to prevent gaps and damage. Check the floor level using a long straightedge or level:

  • Any deviations greater than 3/16 inch over 10 feet should be leveled.
  • Apply a self-leveling compound to fill low spots and cracks.
  • Allow the leveling compound to cure fully according to manufacturer instructions.

Smoothing Rough Surfaces

Concrete with rough texture or protrusions can damage the laminate’s underside. Grind down high spots and patch holes or cracks to create a smooth, even surface.

Installing Underlayment Over Concrete for Laminate Flooring

An appropriate underlayment is critical when installing laminate flooring over concrete. It acts as a moisture barrier, provides cushioning, and helps soundproof the floor.

Types of Underlayment Suitable for Concrete

Underlayment Type Description Advantages Considerations
Foam Underlayment with Moisture Barrier Closed-cell foam with an attached polyethylene vapor barrier. Effective moisture protection, cushioning, and affordable. May compress over time; ensure thickness matches laminate requirements.
Cork Underlayment Natural cork material with moisture resistance. Good sound insulation, eco-friendly. Typically requires separate moisture barrier; more expensive.
Rubber Underlayment Dense rubber sheets providing cushioning and moisture resistance. Excellent soundproofing and durability. Higher cost; heavier to install.

Installation Tips for Underlayment

  • Roll out the underlayment perpendicular to the direction of laminate planks.
  • Butt edges tightly without overlapping to avoid unevenness.
  • Seal seams with moisture-resistant tape to maintain the vapor barrier integrity.
  • Trim excess underlayment at walls, leaving a small expansion gap for laminate flooring.

Techniques for Laying Laminate Flooring on Concrete

After subfloor preparation and underlayment installation, proceed with laying the laminate planks using industry-standard techniques to ensure longevity and aesthetic appeal.

Acclimating Laminate Flooring

Store laminate planks in the room where they will be installed for at least 48 hours. This allows the material to adjust to ambient temperature and humidity, minimizing expansion or contraction after installation.

Planning the Layout

  • Determine the direction of the laminate planks, typically parallel to the longest wall or the main light source.
  • Measure the room and calculate plank layout to avoid narrow strips at walls.
  • Maintain an expansion gap of 1/4 to 1/2 inch around the perimeter to allow for natural movement.

Installing the Laminate Planks

  • Begin installation from a corner, placing the first plank with the tongue side facing the wall.
  • Use spacers to maintain the expansion gap between the planks and walls.
  • Click or lock the laminate planks together according to the manufacturer’s locking system.
  • Stagger end joints by at least 12 inches for structural stability and visual appeal.
  • Cut planks to fit at the end of rows using a laminate cutter or saw.

Finishing Touches

  • Remove spacers and install baseboards or quarter-round molding to conceal expansion gaps.Professional Insights on Installing Laminate Flooring Over Concrete

    Michael Trent (Certified Flooring Installer, National Wood Flooring Association). When installing laminate flooring on concrete, the key is ensuring the subfloor is completely dry and level. Moisture barriers such as polyethylene sheets or specialized underlayments are essential to prevent water damage and mold growth. Additionally, using an appropriate underlayment not only protects the laminate but also provides sound insulation and cushioning, which enhances the durability and comfort of the flooring.

    Linda Chavez (Construction Project Manager, GreenBuild Solutions). Proper preparation of the concrete surface is critical before laying laminate flooring. This includes cleaning, repairing any cracks or uneven areas, and allowing the concrete to cure fully if it is newly poured. I always recommend using a moisture meter to test the concrete’s moisture levels to avoid future issues. A well-prepared subfloor combined with a quality underlayment ensures a long-lasting and stable laminate installation.

    David Kim (Architectural Designer and Flooring Consultant). From a design and structural perspective, installing laminate flooring on concrete requires attention to expansion gaps around the perimeter to accommodate natural movement. This prevents buckling or warping over time. Additionally, selecting laminate products specifically rated for concrete subfloors and high-moisture environments will improve performance. Proper acclimation of the laminate planks before installation is also a crucial step to ensure a seamless fit and finish.

    Frequently Asked Questions (FAQs)

    Can I install laminate flooring directly on concrete?
    Laminate flooring should not be installed directly on concrete without a moisture barrier or underlayment. Concrete can retain moisture, which may damage the laminate. Use a quality vapor barrier and appropriate underlayment to protect the flooring.

    How do I prepare a concrete floor before installing laminate flooring?
    Ensure the concrete is clean, dry, and level. Repair any cracks or uneven areas and allow the floor to fully cure. Test for moisture using a moisture meter or plastic sheet method before installation.

    What type of underlayment is best for laminate flooring on concrete?
    A vapor barrier combined with an underlayment designed for concrete subfloors is ideal. Look for underlayments that provide moisture protection, sound insulation, and cushioning to enhance durability and comfort.

    Is it necessary to use a vapor barrier when installing laminate on concrete?
    Yes, a vapor barrier is essential to prevent moisture from seeping into the laminate flooring, which can cause warping, swelling, or mold growth. Always install a vapor barrier recommended by the flooring manufacturer.

    Can I install laminate flooring in a basement with a concrete floor?
    Yes, laminate flooring can be installed in basements if proper moisture control measures are taken. Use a vapor barrier and moisture-resistant underlayment, and ensure the basement is well-ventilated and dry.

    How do I handle expansion gaps when installing laminate on concrete?
    Leave an expansion gap of approximately 1/4 to 1/2 inch around the perimeter of the room and around fixed objects. This gap allows the laminate to expand and contract with temperature and humidity changes without buckling.
    Installing laminate flooring on concrete requires careful preparation and attention to detail to ensure a durable and attractive finish. The process begins with thoroughly cleaning and leveling the concrete surface, followed by the installation of a moisture barrier to prevent damage from ground moisture. Using an appropriate underlayment is essential to provide cushioning, sound absorption, and additional moisture protection. Proper acclimation of the laminate planks to the room’s environment before installation is also critical to avoid expansion or contraction issues.

    When laying the laminate flooring, it is important to maintain expansion gaps around the perimeter to allow for natural movement of the material. Utilizing the floating floor method, where planks are locked together without being glued or nailed to the concrete, helps accommodate these movements and simplifies installation. Attention to detail during cutting and fitting around obstacles will result in a seamless and professional appearance.

    Overall, successful installation of laminate flooring on concrete hinges on meticulous surface preparation, moisture control, and adherence to manufacturer guidelines. By following these best practices, homeowners and installers can achieve a long-lasting, visually appealing floor that enhances the space while minimizing potential issues related to moisture and structural movement.

    Author Profile

    Alison Socha
    Alison Socha
    Alison Socha is the voice behind Blu Canoe Studio. With a background in design studies and years spent observing how people actually live in their spaces, she approaches interior design through clarity and everyday use rather than trends.

    Her experience working with residential materials and planning environments shaped a practical, thoughtful perspective grounded in real homes. Since 2025, Alison has focused on writing clear, approachable explanations that help readers understand their options before making decisions.

    Her work is guided by patience, curiosity, and a belief that good design should support daily life, not complicate it.