Can Underlay Be Used Under Vinyl Flooring?
When it comes to installing vinyl flooring, one of the most common questions homeowners and DIY enthusiasts ask is whether they can use underlayment. The short answer is yes, underlay can indeed be used under vinyl flooring, but it's essential to understand the types of underlay and their specific uses to ensure the best results.
Why Use Underlay with Vinyl Flooring?
Underlay serves several purposes when used with vinyl flooring. Firstly, it provides a smooth, even surface for the vinyl to adhere to, preventing lumps and bumps from showing through. Secondly, it helps to absorb sound, reducing impact noise and creating a more comfortable living environment. Lastly, underlay can also act as a barrier against moisture, protecting your vinyl flooring from potential damage.
Types of Underlay for Vinyl Flooring
There are several types of underlay available, each with its own set of benefits. The most common types used with vinyl flooring are:

- Foam Underlay: This is the most affordable and commonly used underlay for vinyl flooring. It's easy to install and provides a smooth, even surface. However, it may not offer the same level of moisture protection as other types.
- Felt Underlay: Felt underlay is more expensive than foam but offers better moisture protection and sound insulation. It's a good choice for areas prone to high humidity or moisture.
- Cork Underlay: Cork underlay is a natural, eco-friendly option that provides excellent sound insulation and comfort underfoot. It's also resistant to mold and mildew.
When to Use Underlay with Vinyl Flooring
Underlay is not always necessary when installing vinyl flooring, but it's recommended in most cases. It's particularly useful in the following situations:
- When installing vinyl flooring over an uneven surface to create a smooth, even base.
- In areas where sound insulation is important, such as apartments or homes with hard floors.
- In areas prone to high humidity or moisture, to protect the vinyl flooring from damage.
When Not to Use Underlay with Vinyl Flooring
While underlay has many benefits, there are also situations where it's not recommended. These include:
- When installing vinyl flooring over existing vinyl or laminate flooring. In these cases, it's better to remove the old flooring first.
- When installing luxury vinyl plank (LVP) flooring with a rigid core. These products often come with their own underlayment attached.
Installing Underlay with Vinyl Flooring
If you've decided to use underlay with your vinyl flooring, the installation process is relatively straightforward. Here are the steps involved:

- Prepare the subfloor by ensuring it's clean, dry, and flat. Fill any gaps or holes with a suitable filler.
- Measure and cut the underlay to fit the room, leaving a small overlap at the edges.
- Lay the underlay out in the room, starting in a corner and working your way across the room.
- Secure the underlay to the subfloor using double-sided tape or adhesive.
- Lay the vinyl flooring on top of the underlay, following the manufacturer's instructions for installation.
Conclusion
Underlay can indeed be used under vinyl flooring, and it can provide several benefits in terms of comfort, sound insulation, and moisture protection. However, it's important to choose the right type of underlay for your specific needs and to follow the manufacturer's instructions for installation. By doing so, you can ensure a successful vinyl flooring installation that will last for years to come.