Which material is commonly used for exterior wall sheathing?

Plywood is a commonly used material for exterior wall sheathing due to its structural properties and versatility. It provides strength and durability, which are essential for withstanding environmental conditions such as wind, moisture, and temperature fluctuations. Plywood panels are lightweight and easy to work with, making them a preferred choice for builders. Additionally, plywood can be treated for enhanced moisture resistance and can serve as a base for various types of exterior finishes, such as siding.

Other materials listed, such as drywall and Sheetrock, are generally used for interior applications. They are not designed to withstand outdoor conditions and humidity, which would lead to degradation when exposed to the elements. Concrete, while strong and durable, is typically not used as wall sheathing due to its weight and installation complexity. Thus, plywood stands out as the most practical and effective option for exterior wall sheathing.