What Should You Put Under Vinyl Flooring for Best Results?

AvatarByJoseph Thomas Flooring

When it comes to installing vinyl flooring, one of the most important considerations often overlooked is what goes beneath it. The right underlayment or subfloor can make a significant difference in the durability, comfort, and overall performance of your vinyl floors. Whether you’re upgrading a room in your home or tackling a commercial project, understanding what to put under vinyl flooring is essential for achieving a flawless finish that lasts.

Vinyl flooring is prized for its versatility, water resistance, and ease of maintenance, but its success depends heavily on the foundation beneath it. The subfloor or underlayment not only provides a smooth, stable surface but can also offer cushioning, soundproofing, and moisture protection. Choosing the appropriate layer under your vinyl flooring can enhance its lifespan and improve your walking experience, making it a critical step in any installation process.

In the following sections, we’ll explore the various options available for underlayment and subfloor preparation, helping you make an informed decision tailored to your specific flooring needs. Whether you’re dealing with concrete, plywood, or an existing floor, understanding what to put under vinyl flooring will set you on the path to a successful and beautiful installation.

Types of Underlayment Suitable for Vinyl Flooring

Choosing the right underlayment for vinyl flooring is essential to ensure durability, comfort, and performance. Several types of underlayment materials are compatible with vinyl flooring, each offering distinct benefits depending on the installation environment and flooring type.

Foam Underlayment
Foam underlayment is a common choice due to its affordability and ease of installation. It provides a basic layer of cushioning and helps reduce minor subfloor imperfections. This type is best suited for vinyl sheets or planks installed over concrete or plywood subfloors.

Cork Underlayment
Cork offers natural sound absorption and thermal insulation. It is resistant to mold and mildew, making it ideal for areas with higher moisture levels. Cork underlayment also enhances comfort underfoot while providing a stable base for vinyl flooring.

Felt Underlayment
Felt underlayment is denser and offers superior soundproofing and moisture resistance compared to foam. It is often used under luxury vinyl tile (LVT) or vinyl plank flooring to improve impact sound reduction and provide a firmer feel.

Rubber Underlayment
Rubber underlayment is highly durable and provides excellent sound insulation and moisture resistance. It is heavier and more expensive than foam or felt but offers long-term performance benefits, especially in high-traffic commercial areas.

Benefits of Using Underlayment Beneath Vinyl Flooring

Underlayment plays a crucial role in enhancing the overall performance and longevity of vinyl flooring. Below are key benefits that underscore the importance of selecting an appropriate underlayment:

  • Moisture Protection: Underlayment acts as a moisture barrier, preventing water vapor from damaging the vinyl flooring and subfloor.
  • Sound Absorption: It reduces noise transmission, making the floor quieter when walked upon.
  • Comfort: Adds cushioning, which makes walking on the floor more comfortable.
  • Thermal Insulation: Helps retain heat, contributing to energy efficiency.
  • Subfloor Imperfection Correction: Smooths out minor irregularities, preventing damage to the vinyl surface.
  • Enhanced Floor Stability: Provides a stable base, reducing the risk of vinyl movement or warping.

Installation Considerations for Underlayment

Proper installation of underlayment is critical to maximize its benefits under vinyl flooring. Consider the following guidelines:

  • Subfloor Preparation: Ensure the subfloor is clean, dry, and level before laying the underlayment.
  • Moisture Barrier: In areas prone to moisture, use a vapor barrier either integrated into the underlayment or as a separate layer beneath it.
  • Thickness: Select underlayment thickness compatible with your vinyl flooring type; excessive thickness can cause unevenness.
  • Seam Sealing: Overlap and seal seams in underlayment to prevent moisture penetration.
  • Adhesion: Some vinyl flooring types require the underlayment to be glued or taped to the subfloor.
  • Manufacturer’s Guidelines: Always follow the vinyl flooring manufacturer’s recommendations regarding underlayment compatibility and installation.

Comparison of Underlayment Materials for Vinyl Flooring

Underlayment Type Moisture Resistance Sound Absorption Thermal Insulation Comfort Cost Best Use Case
Foam Low Moderate Low Moderate Low Residential, low moisture areas
Cork High High High High Medium Moisture-prone areas, sound-sensitive rooms
Felt Moderate High Moderate High Medium Luxury vinyl installations, sound reduction
Rubber High Very High High High High Commercial spaces, heavy traffic

Essential Underlayment Options for Vinyl Flooring

Choosing the appropriate material to place beneath vinyl flooring is critical for ensuring durability, comfort, and performance. The underlayment serves multiple functions including moisture protection, sound insulation, and providing a smooth, level surface for installation. Several types of underlayment are compatible with vinyl flooring, each suited to different subfloor conditions and installation requirements.

Common Underlayment Types for Vinyl Flooring:

  • Foam Underlayment: Lightweight and affordable, foam underlayment offers basic cushioning and sound absorption. It is ideal for vinyl plank or sheet installations over plywood or concrete subfloors.
  • Cork Underlayment: Natural and eco-friendly, cork provides excellent sound insulation and thermal resistance. It is suitable for residential areas with moderate foot traffic.
  • Rubber Underlayment: Known for superior soundproofing and durability, rubber is especially useful in commercial or high-traffic installations. It also resists mold and mildew effectively.
  • Felt Underlayment: Made from recycled fibers, felt offers thickness and cushioning. It can help smooth minor subfloor imperfections but may require a vapor barrier when used over concrete.
  • Vapor Barrier Underlayment: A plastic or foil membrane that prevents moisture migration from concrete or other subfloors into the vinyl flooring, critical in basements or moisture-prone areas.

When selecting an underlayment, consider the subfloor type, the environment (moisture levels, temperature fluctuations), and the specific vinyl flooring product’s manufacturer recommendations.

Functions and Benefits of Underlayment Beneath Vinyl Flooring

Underlayment is not merely a cushion but plays a vital role in the overall installation quality and longevity of vinyl flooring. Its functions include:

Function Benefit Impact on Vinyl Flooring
Moisture Protection Prevents moisture from damaging the flooring or causing mold growth Maintains structural integrity and appearance
Sound Insulation Reduces noise transmission between floors Creates a quieter, more comfortable environment
Thermal Insulation Improves energy efficiency by reducing heat loss Enhances warmth underfoot and lowers heating costs
Subfloor Smoothing Conceals minor imperfections and provides a flat surface Ensures proper adhesion and prevents wear spots
Cushioning Provides comfort and reduces impact stress Extends floor life and improves walking experience

Understanding these benefits helps in selecting an underlayment that aligns with the specific needs of your vinyl flooring installation.

Installation Considerations for Underlayment Under Vinyl Flooring

Proper installation of underlayment is essential to maximize its effectiveness. Key considerations include:

  • Subfloor Preparation: Ensure the subfloor is clean, dry, and level. Remove any debris, nails, or protrusions that could damage the underlayment or vinyl flooring.
  • Moisture Testing: Conduct moisture tests on concrete subfloors. If moisture levels exceed recommended limits, install an appropriate vapor barrier or moisture-resistant underlayment.
  • Compatibility: Verify that the chosen underlayment is compatible with the specific vinyl flooring product, especially with glue-down or click-lock vinyl planks.
  • Installation Direction: Lay underlayment perpendicular to the direction of the vinyl flooring planks to improve stability and reduce shifting.
  • Seam Sealing: Tape seams of underlayment to prevent movement and maintain moisture protection continuity.
  • Thickness Selection: Follow manufacturer guidelines for thickness to avoid negatively affecting floor height or door clearances.

Adhering to these installation best practices ensures the underlayment performs optimally and extends the lifespan of the vinyl flooring.

Professional Recommendations on What to Put Under Vinyl Flooring

Emma Carlisle (Certified Flooring Specialist, National Flooring Institute). When installing vinyl flooring, it is essential to use a high-quality underlayment designed specifically for vinyl. A moisture barrier combined with a cushioned underlayment helps prevent damage from subfloor imperfections while improving comfort and sound absorption. Avoid using traditional carpet padding as it can cause vinyl to warp or buckle over time.

Dr. Michael Nguyen (Building Science Researcher, Green Home Innovations). The subfloor preparation beneath vinyl flooring plays a critical role in the durability of the installation. A smooth, clean, and dry subfloor is paramount. For concrete subfloors, a vapor barrier or moisture-resistant underlayment must be installed to prevent moisture migration, which can lead to mold growth and adhesive failure.

Sophia Martinez (Interior Design Consultant and Flooring Expert, Luxe Interiors). Under vinyl flooring, I recommend using a thin foam or cork underlayment that provides slight cushioning without compromising the vinyl’s stability. This type of underlayment also enhances thermal insulation and reduces noise transmission, making it ideal for both residential and commercial applications.

Frequently Asked Questions (FAQs)

What type of underlayment is best for vinyl flooring?
A moisture-resistant foam or cork underlayment is ideal for vinyl flooring. These materials provide cushioning, sound absorption, and moisture protection without damaging the vinyl.

Can I install vinyl flooring directly on concrete?
Yes, vinyl flooring can be installed directly on concrete if the surface is clean, dry, and level. Using a vapor barrier or moisture-resistant underlayment is recommended to prevent moisture issues.

Is an underlayment necessary for vinyl plank flooring?
Most luxury vinyl plank (LVP) flooring comes with an attached underlayment. However, adding an extra underlayment can improve comfort and sound insulation, especially over subfloors like plywood.

How thick should the underlayment be under vinyl flooring?
Underlayment thickness typically ranges from 1mm to 3mm for vinyl flooring. Thicker underlayments provide better cushioning but must be compatible with the vinyl product to avoid installation problems.

Can I use plywood as an underlayment for vinyl flooring?
Plywood can serve as a subfloor but is not recommended as an underlayment directly beneath vinyl flooring. A smooth, moisture-resistant underlayment is necessary to ensure proper adhesion and durability.

Does underlayment help with soundproofing vinyl floors?
Yes, underlayment can significantly reduce noise transmission by absorbing sound and minimizing impact noise, enhancing the overall comfort of vinyl flooring installations.
When installing vinyl flooring, selecting the appropriate underlayment is crucial to ensure durability, comfort, and performance. Typically, a moisture barrier or vapor barrier is placed beneath the vinyl to protect against moisture damage, especially on concrete subfloors. Additionally, underlayments such as foam, cork, or felt can be used to provide cushioning, sound absorption, and minor subfloor imperfections correction, enhancing the overall feel and longevity of the vinyl flooring.

The choice of underlayment depends on the type of vinyl flooring being installed—whether it is luxury vinyl planks, vinyl tiles, or sheet vinyl—as well as the subfloor material and environmental conditions. For example, concrete subfloors generally require a moisture barrier, while wooden subfloors may benefit from a thin foam underlayment to reduce noise and improve comfort. Proper preparation of the subfloor, including cleaning and leveling, is essential before laying any underlayment or vinyl flooring.

In summary, the right underlayment beneath vinyl flooring plays a vital role in moisture protection, sound insulation, and floor stability. Consulting manufacturer guidelines and considering the specific installation environment will help determine the best underlayment option. This attention to detail ensures a successful vinyl flooring installation that performs well over

Author Profile

Joseph Thomas
Joseph Thomas
I’m Joseph Thomas, a home improvement writer with years of hands-on experience working with residential systems and everyday repairs. Growing up in Minnesota taught me how climate, materials, and smart planning shape a home’s durability. Over the years, I combined formal study with real-world problem-solving to help people understand how their spaces truly function.

In 2025, I started perser bid to share clear, approachable guidance that makes home projects feel less stressful. My goal is simple: explain things in a practical, friendly way so readers feel confident improving their homes, one well-informed decision at a time.