Posted by 
There isn’t exactly a single answer for every project. Many LVT products now include an attached pad, designed to provide comfort and sound absorption. In those cases, adding another layer isn’t just unnecessary—it can sometimes interfere with the locking system or make the floor feel unstable.
However, when LVT comes without that built-in padding, underlayment can be valuable. It cushions each step, reduces echo in the room, and can serve as a moisture barrier if installed over concrete. The need for underlayment ultimately depends on the product and the environment where it’s being installed.
Key Takeaways
- Not all LVT requires underlayment; it depends on the product and subfloor.
- Built-in pads often replace the need for separate underlayment.
- Underlayment can improve comfort, sound, and moisture protection.
- Manufacturer guidelines should always guide your decision.
- The right choice protects both your floor’s performance and your warranty.
Factors That Influence the Need for Underlayment
One of the biggest considerations is the type of subfloor. If you’re working over concrete, an underlayment with a moisture barrier is often recommended to prevent water vapor from damaging your new flooring. For wood subfloors, the focus is usually on smoothing out imperfections and reducing creaks.
Another important factor is whether your LVT already includes a pre-attached pad. If it does, you’re generally covered. Adding another layer could compromise the installation. If it doesn’t, then underlayment may be worth the investment.
Finally, think about the room’s purpose. Bedrooms and living rooms benefit most from the added comfort and quiet feel of underlayment, while spaces like basements often require it to control moisture.
Manufacturer Guidelines and Warranties
Every luxury vinyl tile brand provides installation instructions, and those guidelines are crucial.Â
Some will specify that no additional underlayment should be used, while others may recommend or even require it. Ignoring these directions can risk your warranty, leaving you without coverage if problems like warping or separation occur later on.
Checking the manufacturer’s requirements before installation is always the best way to protect your investment.
You can read about the top 5 LVT brands here.
Types of Underlayment That Work with LVT
Cork underlayment is a natural option that especially excels in sound absorption and comfort, though less suited for moisture-prone areas.
Rubber and cork-rubber combo underlayments are denser and more durable, providing superior sound control and impact resistance. The combination of rubber and cork delivers the best of both worlds—rubber’s moisture resistance and cork’s cushioning comfort—making it suitable for both residential and light commercial spaces.
Foam underlayment is a lightweight choice that provides a modest cushion and basic noise reduction. It’s easy to install and commonly used in residential applications where cost and simplicity are key considerations.
In areas with potential moisture exposure, look for underlayments with an integrated vapor barrier to protect your flooring investment. And when in doubt, choose an underlayment specifically designed for LVT or LVP flooring to ensure proper support for the locking system and long-term performance.
When Underlayment Is Essential
Underlayment is essential when you’re installing LVT over concrete without a built-in pad, especially in moisture-prone areas. It also makes sense when your subfloor has slight unevenness that needs smoothing, or in high-traffic spaces where sound reduction is a priority.
On the other hand, if your LVT already comes with a pre-attached pad, extra underlayment isn’t just optional—it may cause more harm than good (e.g., causing issues with stability). Similarly, if your subfloor is clean, smooth, and dry, you can sometimes install directly without any issues.
LVT Performance With and Without Underlayment
The difference is most noticeable underfoot and in how the room sounds.
With underlayment, each step feels softer and more cushioned, creating a more pleasant walking experience. The room may also feel quieter, since the underlayment absorbs impact noise and reduces echo. In colder climates, you’ll also notice a bit more insulation underfoot, which can make a room feel warmer.
Without underlayment, the floor still performs well—particularly when the product already has a pre-attached pad. The installation process is faster and more budget-friendly. You’ll still have a durable, attractive floor—just without those extra benefits.
The Value of Adding Underlayment
While underlayment does add a bit of cost to the project, the value it provides often outweighs the price. A modest investment per square foot can deliver years of added comfort, quieter spaces, and added protection against moisture or uneven subfloors.
Think of it as more than just an accessory, as an extra layer of insurance for your floor. For many homeowners, it’s worth considering underlayment as an insurance policy. You may not always need it, but when you do, it pays off.
Above all, follow the manufacturer’s guidelines for your specific brand to protect your warranty and get the best results. Pair that with proper subfloor preparation, and you’ll have a floor that looks great, feels comfortable, and stands the test of time.
When you’re ready to get started, shop Koffler’s premium selection of underlayment to find the perfect fit for your project.
FAQs
Can I use carpet padding under LVT?
No—carpet padding is too thick and soft, and it will interfere with the locking system of your floor.
Do I need underlayment on a plywood subfloor?
Not always. If the subfloor is smooth and your LVT includes a pad, you can usually install directly.
Does underlayment reduce noise?
Yes. Underlayment materials like cork and foam are designed to absorb sound and minimize echo.
Can LVT be installed directly on concrete?
No, a moisture-resistant underlayment is strongly recommended unless your LVT includes a vapor barrier.