When you’re getting ready to install new flooring, it’s easy to get caught up in the colors, textures, and finishes. But one detail often gets overlooked , underlayment. If you’re choosing vinyl flooring, you might be wondering: Do I really need underlayment for vinyl flooring? Let’s break it down so you can make the best choice for your space.
What Is Underlayment?
Underlayment is a thin layer of material installed between the subfloor and your finished flooring. Think of it as a foundation for your vinyl planks or tiles. It’s not always visible, but it can have a big impact on how your floor performs.
Depending on your flooring type and subfloor condition, underlayment can serve several purposes:
- Smoothing minor subfloor imperfections
- Adding sound insulation
- Providing moisture protection
- Improving comfort underfoot
- Enhancing thermal insulation
But here’s the thing , not every vinyl floor requires underlayment.
Types of Vinyl Flooring and How Underlayment Fits In
Vinyl flooring has evolved. It’s no longer just sheet vinyl in rolls. Today, you have multiple options, and each one interacts differently with underlayment.
1. Luxury Vinyl Plank (LVP) and Luxury Vinyl Tile (LVT)
These are the most popular types today. They come in floating or glue-down varieties.
- Floating LVP/LVT often has a click-lock system. Some of these planks come with a pre-attached pad. In this case, additional underlayment usually isn’t necessary. In fact, using more can cause the floor to feel unstable.
- Glue-down LVP/LVT doesn’t have padding. You might want to use underlayment for sound absorption or to smooth minor imperfections. But check the manufacturer’s guidelines , some adhesives don’t work well with underlayment.
2. Sheet Vinyl
Sheet vinyl flooring usually doesn’t require underlayment. It’s installed directly over a smooth subfloor. However, if your subfloor isn’t perfect, a thin underlayment can help level it out. Plywood or a specific vinyl underlayment may be used.
3. Vinyl with Attached Underlayment
Some high-end vinyl flooring products come with a foam or cork pad already attached. If you choose this type, you’re good to go , no extra layer needed. In fact, adding another underlayment could void your warranty.
So, Do You Need Underlayment for Vinyl Flooring?
The answer depends on a few factors. Here’s what to consider before deciding:
1. What Does the Manufacturer Recommend?
This should always be your first check. Flooring manufacturers know their products best. Ignoring their advice can affect performance , and your warranty.
2. What’s Your Subfloor Like?
- If your subfloor is concrete, moisture is a concern. A moisture barrier underlayment might be necessary.
- If your subfloor is wood, it may already have some cushioning and doesn’t trap moisture like concrete. In this case, underlayment is optional and depends on comfort and sound needs.
- If the surface is uneven, underlayment can help smooth it out, but only to a point. Serious dips or humps should be fixed before installation.
3. Are You Looking for Sound Reduction?
In multi-level homes or apartments, sound can travel between floors. Sound-absorbing underlayment like cork or foam can help reduce noise.
4. Is Comfort Important?
Vinyl on concrete floors can feel cold and hard underfoot. A soft underlayment can add warmth and comfort, especially in bedrooms and living areas.
Best Types of Underlayment for Vinyl Flooring
If you’ve decided to use underlayment, it’s important to choose the right type. Not all materials work well under vinyl.
Foam Underlayment
- Lightweight and affordable
- Works well with floating vinyl floors
- Offers minimal sound absorption and cushioning
- Avoid using if vinyl already has attached padding
Cork Underlayment
- Great for sound insulation
- Eco-friendly and durable
- Often used under floating floors
- Not recommended in moist areas like bathrooms or basements
Felt Underlayment
- Dense and strong
- Ideal for extra comfort and soundproofing
- Can work under both floating and glue-down vinyl (if allowed by the manufacturer)
Moisture Barrier Underlayment
- Made with plastic or vapor-retardant layers
- Needed when installing over concrete
- Helps prevent mold and mildew under the floor
What Happens If You Skip Underlayment?
Skipping underlayment might save money upfront, but it could cost you later. Without proper support:
- The floor might feel hard or loud
- Minor bumps in the subfloor can show through
- You may get more wear and tear over time
- In some cases, it can cause the planks to shift or snap
That said, not every installation needs underlayment. If your vinyl has a pad and your subfloor is smooth, you’re fine.
Tips Before Installing Vinyl Flooring
- Inspect your subfloor thoroughly. Fix any damage or uneven spots.
- Check if your vinyl planks or tiles have an attached underlayment.
- Read the manufacturer’s guide carefully. This isn’t just a suggestion , it’s a must.
- Test for moisture if you’re installing over concrete.
- If needed, use a moisture barrier to protect your investment.
Want help choosing the right type of flooring? Check out this guide on how to choose the best vinyl flooring from BYB Good Idea for even more insight.
Wrapping It Up
The need for underlayment for vinyl flooring depends on your subfloor, the type of vinyl, and your personal needs. While not every situation calls for it, underlayment can make a big difference in comfort, noise control, and floor lifespan.
Before installation, take time to evaluate your space. A few extra steps now can save you from headaches down the line.
If you’re still unsure, this complete vinyl flooring installation guide can walk you through everything ,from tools to layout tips.
Bottom line? Underlayment isn’t always needed, but when it is, it makes your floor better, quieter, and longer-lasting.