Underlayment

Definition

Underlayment is a layer of material such as hardboard, particleboard, plywood, or mastic placed over a subfloor to cover irregularities, absorb movement, and provide a smooth surface for the finish flooring material.

Purpose

The primary function of underlayment is to create a stable, uniform surface for the installation of finish flooring materials. It helps to distribute loads, reduce noise, and enhance the durability and appearance of the finished floor.

Examples of Use

• Hardwood Flooring: Installing underlayment beneath hardwood floors to ensure a smooth and even surface.
• Tile Flooring: Using cement board underlayment to provide a sturdy base for tile installations.
• Vinyl Flooring: Applying foam underlayment beneath vinyl planks to absorb sound and increase comfort.

Related Terms

• Subfloor: The structural layer beneath the underlayment, providing support.
• Soundproofing: Techniques and materials used to reduce noise transmission.
• Moisture Barrier: A layer that prevents moisture from penetrating the subfloor or flooring materials.

Notes

Selecting the appropriate type of underlayment for the specific flooring material is crucial for achieving optimal performance. It is also important to follow manufacturer guidelines for installation to ensure long-lasting results.