What is the minimum required thickness for exterior wall sheathing?

The minimum required thickness for exterior wall sheathing is 1/2 inch. This thickness is essential for ensuring adequate structural support and rigidity in residential buildings. Sheathing provides a base for exterior finishes and plays a crucial role in the overall stability of the wall system.

Using 1/2 inch sheathing helps to resist wind loads and impacts, contributing to the building's durability. It also serves as a substrate for insulation and other finishing materials, allowing for better energy efficiency and comfort in the dwelling.

In contrast, thinner materials such as 1/4 inch or 3/8 inch may not provide sufficient strength or structural integrity required for load-bearing walls, especially in regions subject to various environmental stresses. While thicker options like 5/8 inch could potentially offer enhanced strength, they are not the minimum requirement specified in most building codes, making 1/2 inch the standard choice for exterior wall sheathing in residential construction.