Three different recipes
All three are engineered panels made by gluing wood into flat sheets. They differ in what the wood is turned into first, and that shapes everything else.
- Plywood: thin veneers stacked in layers, with the grain of each layer turned perpendicular to its neighbor and bonded with adhesive. Panels usually have an odd number of layers.
- MDF (medium-density fiberboard): fine wood fibers combined with resin and pressed into a dense, uniform board.
- Particleboard: wood chips, flakes or sawdust bound with adhesive and pressed into a panel. Quality and density vary widely.
Sheet sizes vary, but 4 by 8 feet is common in the US, and thickness labels are often slightly different from actual thickness. Measure before you design joints around a stated thickness.
Plywood
Plywood is the strongest and most stable of the three for its weight. The cross-laminated layers limit movement and make it resistant to splitting along the edges. It holds screws well, including near edges, and it supports structural uses such as subfloors, sheathing and cabinet boxes. Surfaces can be hardwood veneer for furniture or a plain face for hidden work.
Weak points include visible layers on edges, which usually need edge banding or filler if appearance matters. Lower grades can have voids or patches, and the thin face veneer chips easily when cut. Quality and price range from basic construction grades to premium cabinet grades. Some panels are made with exterior-rated adhesive for damp conditions, but plywood is still wood and should be sealed if exposed to moisture.
MDF
MDF has a smooth, uniform surface with no grain, which makes it a favorite for painted work, templates and jigs. It machines well, takes clean router profiles and is typically cheaper than plywood. However, it is heavy, it sags under load across long spans, and it swells and breaks down if it soaks up water, especially at the edges. Screws hold less well in the edges, so pilot holes are important, and repeated assembly can strip the hole. Many builders use dowels, biscuits or specialty fasteners instead.
MDF is dense and produces very fine dust when cut or sanded, and it dulls blades relatively quickly. Wear a respirator suited to fine dust, use dust collection and work with good ventilation. Some MDF and other panels use adhesives that can release small amounts of formaldehyde, so check labels for low-emission products and ventilate while cutting and finishing.
Particleboard
Particleboard is generally the least expensive option, and it is common as core material for laminate countertops and flat-pack furniture. It has little strength across long spans, holds screws poorly in its edges, and swells significantly if it gets wet. Better grades are denser and more uniform, and are often covered with melamine or laminate for protection.
It works for light-duty shelving, shop utility storage and underlayment where it will stay dry and well supported. Heavy loads, repeated disassembly and damp areas are common ways it fails.
Cutting behavior
- Plywood: tends to splinter on the exit face. Use a sharp, fine-tooth blade, and cut with the good face down for a handheld circular saw or jigsaw, or face up on a table saw. Cutting plywood cleanly is helped by scoring and tape.
- MDF: cuts cleanly without splintering but leaves fine dust and dulls blades. Carbide-tipped blades are common for this reason.
- Particleboard and melamine: chip easily at the edges, especially the coating. A fine blade and well-supported cut help.
All three are heavy in full sheets, so plan how to lift and support them. Many people break sheet goods down with a circular saw and guide before using other tools.
Quick comparison
- Strength and screw holding: plywood is generally best, then MDF, then particleboard.
- Surface for painting: MDF is smoothest, though its edges soak up paint.
- Moisture tolerance: plywood is generally better, but none of the three suits constant dampness without protection.
- Weight: MDF and particleboard are usually heavier than plywood of the same size.
- Cost: particleboard is usually lowest and cabinet-grade plywood often highest, though local prices vary.
Choosing
Plywood is a common choice for structure, cabinet boxes and anywhere strength matters. MDF fits painted parts, jigs and templates. Particleboard suits light, dry, budget applications, often with a laminate surface. If you are unsure, check the panel’s stated grade and intended use, and match the thickness to the span it will carry.