What is Plywood?

Plywood is an engineered wood panel made by gluing thin layers of wood veneer together with the grain of each layer running perpendicular to the next. This cross-grain construction is what gives plywood its remarkable strength and dimensional stability – the layers cancel out each other’s tendency to expand, contract, or warp.

In cabinetry, plywood is the gold standard for the cabinet box – the sides, top, bottom, and back of the case. A 3/4″ plywood box is stronger, more dimensionally stable, and holds screws better than the same box made from solid wood or particleboard. It is also significantly more resistant to humidity, which matters in kitchens and bathrooms.

Key features of plywood

• Cross-grain layers: Veneers stacked with alternating grain directions.
• Dimensionally stable: Resists warping, expansion, and contraction.
• Strong screw hold: Layers grip fasteners far better than particleboard.
• Moisture-resistant: Handles humidity better than solid wood or particleboard.
• Cabinet-grade vs construction-grade: Cabinet-grade plywood uses higher-quality veneers and tighter manufacturing.

BuyWholesaleCabinets builds its framed cabinet lines with 1/2″ A-grade plywood boxes and its frameless line with 3/4″ plywood boxes, with a UV-coated natural wood finish on the visible interior surface. No particleboard is used in the construction.

FAQ

What is the difference between plywood and MDF?

Plywood is made of thin layers of real wood veneer glued together. MDF is made of wood fibers pressed into a uniform panel. Plywood is stronger and holds screws better; MDF is smoother and better for painted surfaces. Quality cabinets use plywood for the box and MDF for painted door center panels.

Is plywood better than solid wood for cabinet boxes?

For boxes, yes. Plywood is more dimensionally stable than solid wood for large flat surfaces, which is exactly what a cabinet box is. Solid wood boxes can crack, warp, or split as the wood moves with seasonal humidity. Plywood does not. Solid wood is better for door frames and face frames, where its strength and repairability matter more.

How thick should cabinet plywood be?

Common cabinet-grade standards are 1/2″ to 3/4″ for the sides, top, and bottom, and 3/4″ for shelves. Lower-grade cabinets sometimes use 3/8″ sides or thin hardboard backs – these are the corners that get cut to lower costs but compromise durability.

Is all plywood the same quality?

No. Plywood is graded by the number of layers (more is better), the quality of the veneers (cabinet-grade uses higher-quality face veneers), and the type of adhesive (waterproof adhesives are more durable). Cabinet-grade plywood is significantly higher quality than construction-grade plywood used in framing.