Plywood vs OSB: Which Performs Better for Walls and Roofs? Key Differences Explained

Plywood vs OSB: Which Performs Better for Walls and Roofs? Key Differences Explained Choosing between plywood and OSB for wall and roof sheathing is a frequent decision for budget-conscious DIY builders and self-builders. This article compares plywood vs osb which performs better walls roofs and walks through durability, moisture resistance, cost, fastening, and real-world use cases so you can make a confident selection for your project. Readers will get a clear TL;DR, a comparison table of key metrics, evidence-based durability notes, and scenario-based recommendations for walls, roofs, and airtight or high-moisture builds. TL;DR: - Plywood usually holds nails better and swells less at edges after wetting — choose plywood for steep roofs, exposed sheathing, or where fastener withdrawal matters. - OSB is typically 10–25% cheaper per 4x8 sheet and offers consistent shear strength for shear walls and roofs; modern treated OSB with edge sealing performs much better than older batches. - F...