Typical interior walls are framed with 2x4s. This makes walls about 4½ inches thick (3½ inches of wood covered on both sides by ½-inch-thick drywall).
How Thick Is an Interior Wall?
Interior walls are a critical part of any home or building’s construction, providing a barrier between rooms and providing structural support. When it comes to interior walls, thickness is an important consideration. How thick an interior wall should be depends on several factors, including the type of structure and the intended use of the wall.
In a typical residential home, the thickness of an interior wall will range from 4 – 6 inches. This is thick enough to provide structural integrity and to prevent sound from passing through the wall. For a more soundproof interior wall, a thicker wall is required. In a commercial building, the walls may need to be thicker due to heavier loads and higher traffic. In these cases, a wall thickness of 8 – 12 inches may be used.
In some cases, an interior wall may need to accommodate wiring or plumbing. If this is the case, the wall must be thick enough to allow for the necessary services. This typically requires a wall thickness of at least 8 inches. For walls that are to be covered in drywall, the thickness should be increased by an additional 1/2 inch to ensure a flush finish.
Some types of structures require a minimum wall thickness. For example, load bearing walls must be