Oriented strand board (OSB), a versatile building material made from wood strands, is commonly used on interior walls. Its strength and stability make it ideal for sheathing, providing structural support and a base for other wall coverings. OSB on interior walls meets building code requirements, ensuring safety and durability, as outlined by the International Building Code and International Residential Code. Its ease of installation and adaptability to various wall structures make OSB a preferred choice in modern construction practices.