OSB, or oriented strand board, is a type of engineered wood. Manufacturers make it by pressing together layers of long, thin wood strands with glue, lining them up in specific directions to boost strength.
People use OSB a lot in construction and furniture because it’s strong, tough, and doesn’t break the bank. There are actually quite a few different types, depending on what you need. Here’s a breakdown:
OSB/1 is for general stuff and furniture, but only if you’re working in dry places.
OSB/2 handles heavier loads—still for dry conditions.
OSB/3 is stronger, meant for load-bearing jobs in humid spots.
OSB/4 is the heavy hitter, built for big loads and damp conditions.
Other options include standard OSB, sanded or laminated finishes, and film-faced panels. Edges come in different styles too—square or tongue-and-groove, depending on the job. You’ll find OSB made for construction, furniture, and even packaging. Some boards are fire-retardant, moisture-resistant, or designed to give off less formaldehyde. There’s OSB for structural insulated panels, decorative uses, heavy-duty needs, and even recycled OSB for eco-friendlier projects.
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