Ply means layer. The thickness of the sheet is determined by the ply. More ply creates a thicker and stronger board. The minimum number of plies are 3-ply and can go up to 5 or more. Plywood with lesser number plies are thinner and weaker even if they’re of the same thickness.
- 3-ply: These sheets are 2 to 3 mm thick and is the most common type of plywood for home interiors.
- 5-ply: This plywood is the most versatile option that is 4 mm thick. This type of plywood works great for indoor and outdoor furniture and decorative boards.
- Multi-ply: This plywood has 7 or more layers. It’s strong and durable enough for permanent structures like roofing.
Plywood often comes with grades that can determine the quality and appearance of it.