Which of the following may be used as subflooring?

Subflooring serves as the foundational layer that sits between the floor joists and the finished flooring surface. It is crucial for providing stability and support for the flooring above. Various materials can be used for subflooring based on factors like cost, availability, and the specific requirements of the building project.

Plywood is a commonly used material for subflooring due to its strength, durability, and ease of installation. It comes in large sheets, making it efficient for covering large areas, and its several layers of wood veneer provide excellent structural integrity.

Common boards, which are typically solid wood planks, can also be used for subflooring. These boards can offer good weight-bearing capabilities, especially in less demanding applications. However, they may not provide the uniformity and moisture resistance of engineered materials.

Ship-lap, known for its interlocking design, can also work as subflooring, especially in traditional or historical contexts. The overlapping edges create a stable and secure fit, which can be beneficial in some scenarios.

Using all of these materials—plywood, common boards, and ship-lap—as subflooring is a valid choice, depending on the specific needs of the construction project. Thus, the option stating that all of the provided materials