Veneer Plywood or Solid Wood for Cabinet Boxes

A cabinet door that rocks on the counter like a shallow dish has cupped, and the cupping started in the board, not in the hinge. Every return visit logged at cabinet maker austin studio antwork for a warped door points back to the same choice at the start of the job, solid wood or veneer plywood for that part. Austin swings from damp to dry every year, and the material has to be picked with that in mind.

What veneer plywood does

Plywood is thin layers glued with the grain of each layer turned ninety degrees from the one beside it. The layers hold each other flat, so a sheet moves very little across its width when the air changes. A birch plywood box with a maple veneer face stays square through a dry, air-conditioned summer and a humid spring. For a carcass, a plywood box is the sound choice, and a shelf in the same material resists sagging when it is edged correctly.

What solid wood does

A solid hardwood board is one piece cut from the tree, and it breathes. It looks right, it can be shaped on the router, and it takes stain with real depth. It also moves across its width with the seasons, which suits a narrow stile and rail but not a wide panel glued rigid. A raised panel door uses solid wood because the panel floats in its groove and is free to move.

The solid wood edge on plywood

Raw plywood shows its layers on the edge, so a face frame or a strip of solid wood hides them. A strip of oak or maple is glued to the plywood edge, planed flush and sanded, and the finish then sees one continuous surface. On a frameless cabinet the edge is covered with a thin band applied with heat and trimmed flush. A slab door built from veneer plywood with a solid wood edge looks like a single plank and holds flat.

MDF and the other sheet goods

MDF is stable and paints smoothly, so it is used under painted doors and on the flat panel of a Shaker design. It takes screws poorly at an edge and swells if water gets to it. Melamine and thermofoil are surface treatments over a core, usually in utility rooms and closets rather than a main kitchen.

Choosing by part

A maker does not choose one material for a whole job. The carcass is plywood, the face frame and door frames are solid hardwood, the panels float, and the drawer box is plywood or solid wood with dovetail corners. Homes in Travis Heights and Tarrytown, where mature trees keep the air a little damper under the canopy, get the same treatment, because the rule is the same everywhere in Austin, TX: let each part move the way its material wants to.