Plywood vs MDF vs Particleboard: What Your Cabinets Are Made Of

Plywood is glued layers of wood, MDF is pressed fiber, and particleboard is pressed chips, whose medium-density grade runs 640 to 800 kg/m³ under ANSI A208.1. Our main lines use a ½" plywood box, and painted lines may use HDF frames with an MDF center panel. We tell you which part is which.

Quote the same kitchen twice and the plywood box lands 10 to 15 percent above the MDF one, going by our own projects. We still recommend plywood, because the boxes we've seen fail swelled at the sink base and let hinge screws spin loose.

It's fine for a painted center panel and wrong for a box. Particleboard belongs nowhere near a sink.

Our main lines pair a ½" plywood box with ¾" adjustable shelves, and MDF shows up in painted center panels and the slab line's doors.

For kitchen cabinets we offer shaker, slim shaker, slab, raised panel and inset door styles, and the build changes by line. The doors and drawers are what you see. The box is what you buy.

A price tag that says wood can hide a box that costs 10 to 15 percent less to build, and in our kitchens that cheaper box is the MDF one.

That word usually describes the cabinet doors. The box can be plywood, MDF, or particleboard, and the tag won't tell you. Look under the sink after two years. We've been called back to boxes where the sink base swelled and the paint lifted at the bottom edge first. Particleboard has the same weakness unless it's a moisture-resistant grade, and even MR10 and MR50 cap thickness swell at 5.5 percent, not zero.

People ask why we don't build an all-wood box. Boards move with humidity. A box made of boards twists out of square. Glued layers pull against each other and hold it flat, and the glue stops water from getting in, so we pair a plywood box with wood door frames, where natural wood grain and real joints earn their keep.

Our founder puts it this way: "If you want a kitchen that lasts for years, do not buy cabinets with MDF boxes." He means the box only. MDF is pressed wood fiber that looks fine new, but water under the sink or at a damaged edge makes it swell, and it can't be restored. It also crumbles around screws on re-tightening, so repairs get hard. Saving a few hundred dollars on boxes makes little sense when thousands go into the kitchen.

Here's what you pay for. A customer showed us a Home Depot quote of $33,000 to $34,000 for kitchen cabinets only. We quoted $7,800 for the same kitchen, already painted. The kitchen, two bathrooms and floors came to $30,000 total with us. Big stores pick the price; people pay it out of habit.

Six checks in our showroom tell plywood from MDF and particleboard, starting with the raw edge of a box.

1. Look at the raw edge of the box. Plywood shows thin stacked layers, a uniform fuzzy edge means MDF, and visible chips mean particleboard.
2. Pull two drawers and swing a door, since hinges and drawer glides fail first in the cheap cabinets we replace, used every day. We use ⅝" dovetail boxes, undermount full-extension glides, and concealed soft-close hinges.
3. Knock on the side panel and press the edge. On MDF sides we've watched hinge screws spin in the hole after a second tightening.
4. Check the inside, where our interiors are a natural UV-coated surface or veneer, and ask what the warranty covers for the box.
5. Ask for the TSCA Title VI label on the composite panels, required in the US since March 22, 2019. Then ask if the line passed KCMA A161.1, which runs 14 tests including a 600-lb load test that 40 to 50 percent of cabinets fail on the first try, and remember a pass covers a product line, not a material.
6. Look at the cabinet door edge. Whatever door style you pick, a five-piece door shows a frame around a center panel, and a wrapped MDF door shows one slab with a seam.

Open the door and look at the box. That's where the money is.

A plywood box is standard on our main lines, with wall cabinets from $43 and base cabinets from $87 (cabinets only; assembly, installation and delivery extra), and a full 10x10 kitchen of cabinets runs from $1,842 to $4,882 on our ready-to-assemble line. In our projects a plywood box usually runs 10 to 15 percent more than the same kitchen with an MDF box. Customers ask us for the cheaper one, and we recommend plywood anyway, because over 20 years and 1,000+ projects the plywood boxes we installed are still square and dry.

The painted versus stained price index across wood finishes is. The warranty is set per line, and we put it in your quote in writing: Cabinetry, door hinges and drawer glides carry a one-year limited warranty against defects in materials and workmanship for the original purchaser; claims go in writing with photos and proof of purchase, and we repair or replace at our discretion. Run your own numbers on the pricing page or in the kitchen remodel cost guide, then bring the quote to the showroom and we'll walk the box line by line.

Send these five details and we build your free 3D design, which opens on your phone, changes by one message, and stays valid for 10 days.

• ZIP
• Photos of your kitchen
• Ceiling height
• Wall lengths
• Phone

Within 100 miles of Alpharetta, Prime Cabinet Store measures the kitchen itself. Outside that zone you measure, and we recommend a professional check before you order.