The picture shows a worker installing flooring, kneeling on the floor with a piece of flooring in his hand. The floor is light brown in color with a smooth and wood grain textured surface. The floor in the worker's hand has a gap between it and the wall for filling and fixing.

EVA Foam in Underlayment for Flooring: A Comprehensive Guide


Flooring is an essential aspect of any building, be it residential or commercial. While the top layer of flooring gets all the attention, it’s the underlayment that plays a crucial role in ensuring comfort, durability, and sound insulation. One of the most popular materials for underlayment is EVA (Ethylene Vinyl Acetate) foam. This article delves deep into the benefits and applications of EVA foam as an underlayment for various flooring types.

What is EVA Foam?

EVA foam is a blend of Ethylene and Vinyl Acetate, resulting in a soft yet durable material. It’s known for its shock-absorbing properties and is widely used in various industries, from sports equipment to packaging. Its closed-cell structure ensures that it’s water-resistant, making it an excellent choice for flooring underlayment.

Why Choose EVA Foam for Flooring Underlayment?

  1. Sound Insulation: EVA foam effectively reduces the sound of footsteps, providing a quieter living or working environment. This is especially beneficial in multi-story buildings where noise can easily travel between floors.
  2. Comfort: The cushioning effect of EVA foam adds a layer of comfort underfoot, making it easier to stand or walk for extended periods.
  3. Durability: EVA foam is resistant to wear and tear, ensuring that the underlayment lasts as long as the flooring on top.
  4. Moisture Resistance: Its closed-cell structure ensures that EVA foam is resistant to moisture, preventing mold growth and protecting the flooring above.
  5. Thermal Insulation: EVA foam provides an insulating layer, helping to maintain a consistent temperature within a room and potentially reducing energy costs.

Applications of EVA Foam in Different Flooring Types

  • Laminate Flooring: EVA foam provides a smooth surface, ensuring that the laminate pieces fit together perfectly. Its moisture-resistant properties also protect the laminate from any dampness from the subfloor.
  • Engineered Wood: The cushioning effect of EVA foam reduces the stress on engineered wood floors, extending their lifespan.
  • Tile Flooring: EVA foam can act as a decoupling layer, allowing the tiles to flex without cracking.
  • Vinyl Flooring: Using EVA foam underlayment can enhance the comfort and sound insulation properties of vinyl floors.

Installation Tips

  • Always ensure the subfloor is clean and free from debris before laying the EVA foam underlayment.
  • Use a utility knife to cut the foam to fit the room’s dimensions.
  • For optimal sound insulation, tape the seams of the foam sheets together.
  • Follow the flooring manufacturer’s recommendations regarding the thickness and type of underlayment.


Q: Can I use EVA foam underlayment for carpeted floors?
A: Yes, EVA foam can be used under carpets, especially in areas where moisture resistance and sound insulation are priorities.

Q: How thick should the EVA foam underlayment be?
A: The thickness varies based on the type of flooring and the specific requirements of the project. Typically, thicknesses range from 2mm to 5mm.

Q: Can EVA foam underlayment be used over radiant heating systems?
A: Yes, EVA foam is suitable for use over radiant heating systems. However, always check the manufacturer’s guidelines before installation.

Q: How does EVA foam compare to other underlayment materials?
A: EVA foam offers superior sound insulation, moisture resistance, and durability compared to many other underlayment materials. It’s also lightweight and easy to install.


EVA foam underlayment is a game-changer in the world of flooring. Its myriad benefits, from sound insulation to moisture resistance, make it an ideal choice for various flooring types. Whether you’re renovating your home or working on a commercial project, consider EVA foam for a comfortable, durable, and quiet floor.

Application of EVA foam in building products

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