What material is commonly used for subflooring to provide support?

Subflooring is a crucial component of a flooring system, as it provides a stable foundation for the finished floor covering. Both plywood and OSB (Oriented Strand Board) are commonly used materials for subflooring due to their structural integrity and ability to support vertical loads effectively.

Plywood is made from thin layers of wood veneer that are glued together in alternating grain directions, which enhances its strength and reduces the likelihood of warping or splitting. It is favored for its durability and moisture resistance, making it ideal for subfloor applications.

OSB, on the other hand, is manufactured from strands of wood that are bonded together with adhesives and pressed into sheets. It is designed to provide a good strength-to-weight ratio and is often more cost-effective than plywood while still offering comparable performance in terms of load support and stability.

By combining both plywood and OSB as acceptable materials for subflooring, this answer reflects the versatility and options available to contractors and builders when selecting materials that meet structural requirements and budget considerations. Hence, the reference to both options as being widely used underscores their relevance in construction practices.