Subflooring is the part of a building’s structure that the floor is laid on top of. It is sandwiched between the floor itself and the joists of the building. There are many common subfloor materials, including concrete and plywood.

Subflooring is the structural surface of a floor that supports the finished flooring. The most common types of modern subflooring are plywood or oriented strandboard (OSB), while older homes may have lumber subfloors.

Subflooring is a structural layer and should not be confused with underlayment or cement board or tile backer, which create a layer between the subfloor and the finish flooring. Wood planks were the traditional subflooring material used in homes built up to the mid-twentieth century.

When choosing the type of subflooring you’d like to install, consider both the flooring material as well as the underlay above which the subflooring will be installed. There are four main surface categories: Plywood. OSB boards. Concrete slab. Plastic panels. The Purpose of a Solid Flat Base

There are multiple types of subfloor materials being used in the industry like wooden planks, OSB boards, plywood, high-performance planks, etc. Out of all the options available, plywood is the best due to its greater strength, and high moisture resistance.