Can oriented strand board be used as exterior siding?

Oriented strand board (OSB) is typically not recommended for use as exterior siding due to its susceptibility to moisture. While OSB is a versatile engineered wood product commonly used in structural applications, such as sheathing for walls, roofs, and floors, it does not possess the durability and water-resistant characteristics required for exterior siding.

When OSB is exposed to weather elements without adequate protection, it can absorb water, leading to swelling, warping, and degradation over time. Therefore, while it might serve in certain temporary applications or sheltered areas, utilizing OSB as a primary siding material is not advisable for long-term exterior use. The correct choice reflects the understanding that appropriate materials are critical for exterior applications to ensure durability and longevity.