OSB Vs. Plywood: What Is The Difference?
If you’re deciding between OSB and plywood, it comes down to performance, cost, and application. Here’s a no-fluff comparison to help you make the right choice for your project.
| Feature | OSB | Plywood |
|---|---|---|
| Cost | 20–30% cheaper | More expensive |
| Sheet Size Options | Larger sheets available (up to 24 ft) | Typically 4x8 ft |
| Weight | Heavier | Lighter |
| Shear Strength | Higher | Lower |
| Stiffness | Less across panel | Greater stiffness across grain |
| Water Resistance | Swells and may stay swollen | Swells less, dries back when wet |
| Fastener Holding | Weaker hold | Stronger screw/nail retention |
| Appearance | Rough, patchy | Smooth, furniture-grade finish |
| Best For | Subfloors, wall/roof sheathing | Cabinets, furniture, humid areas |
| Environmental Impact | Uses fast-growing trees, less waste | More solid wood, more resource-intensive |
| Formaldehyde Emission | Often higher unless specified low-emission | Typically lower |
Quick Takeaway: OSB is ideal for budget-friendly structural work in dry conditions. Plywood is better when durability, water resistance, and surface appearance matter.
Go with OSB if you’re covering large areas, working on structural sheathing, and need to keep costs down. It performs well in dry environments and is ideal for rough, hidden construction.
Choose plywood if your project involves visible surfaces, curved elements, or moisture-prone areas. Its better finish, fastener strength, and water resistance make it worth the higher price in many cases.
Also consider your local climate and installation timeline. OSB may degrade quickly if exposed to rain before roofing or siding is installed. Plywood is more forgiving during delays, making it a safer choice for projects without full weather protection.
Both materials meet building code standards when properly installed.