A ply board wall is a fast way to create a clean, strong lining for fit-outs, storage areas, and site buildings. In this guide, you will learn how to specify a ply board wall by plywood grade, thickness, and finish so panels stay flat and joints stay neat. We also compare plywood wall panels for interior use and wall sheathing use, plus key tips on moisture control, fixing, and edge sealing. Use the checklist to confirm face quality, core build, emissions target, and packing standard before you order in volume.