Subfloor

Definition

A subfloor is the first layer of plywood or planks laid over the floor joists or concrete substrate.

Purpose

The purpose of a subfloor is to provide a stable, level base for the finished flooring, ensuring structural integrity and a smooth surface for installation.

Examples of Use

• Residential homes use subfloors as the base for carpeting, hardwood, or tile flooring.
• Commercial buildings employ subfloors to support various types of floor coverings, such as vinyl or laminate.
• Renovation projects often involve replacing or repairing subfloors to improve stability and prepare for new flooring.

Related Terms

• Joist: A horizontal structural member that supports the subfloor.
• Underlayment: A layer of material placed over the subfloor to smooth out imperfections and provide a better surface for the finished floor.
• Finish Floor: The top layer of flooring material that is visible and walked on.

Notes

Subfloors are essential for providing the necessary support and stability for finished flooring, ensuring a long-lasting and durable floor system.