Are Plywood Cabinets Better Than MDF?
The honest answer is that plywood is better for boxes and MDF is often better for painted doors. Treating this as a single winner-take-all question leads people to the wrong cabinet.
Where plywood wins
Plywood is lighter, stronger in shear, holds screws far better, and tolerates moisture. A plywood box that gets wet can dry out; an MDF box that gets wet swells and never recovers. For sides, shelves, backs, and anything structural, plywood is the right call.
Where MDF wins
MDF has no grain and no wood movement, so a painted MDF door stays flat and shows no grain telegraphing or joint lines at the stile-and-rail seams. For a crisp painted shaker or slab door, MDF center panels or full MDF doors give a better long-term paint finish than solid wood.
- Painted doors: MDF resists seasonal cracking at the joints
- Stained doors: solid wood or veneered plywood only — MDF cannot take stain
- Weight: MDF doors are noticeably heavier and need good hinges
The practical combination
Most high-quality painted kitchens we build use plywood boxes, solid wood or MDF door frames, and MDF center panels. You get structural durability where it matters and a flawless paint surface where you see it.
The short answer
Use plywood for boxes and shelves; use MDF where you want a perfectly flat painted door. Never use MDF under a sink.