What is the most common thickness of hardboard siding?

The most common thickness of hardboard siding is 7/16 inch. This thickness is widely used in residential construction due to its balance between durability and weight. It provides sufficient structural support and resistance to weather conditions while also being easy to handle and install. Hardboard siding is typically used for its smooth surface finish and versatility in various applications, including painting or staining to enhance its aesthetic appeal and protect against the elements.

While other thicknesses are available, 7/16 inch has become a standard in the industry, making it a common choice for builders and homeowners alike for siding projects. This choice aligns with typical building codes and practices that prioritize both cost-effectiveness and performance in external wall applications.