Medium-Density Fiberboard, known simply as MDF, is common for both furniture and home construction these days. The inexpensive engineered wood material—a composite of sawdust and resins, fused together in a high-heat, high-pressure process—comes in 4’ × 8’ sheets and smaller project-sized boards ranging from 1/4” to 1” thick, much like boards of plywood. But unlike plywood, which is manufactured from many thin sheets of wood veneer, MDF is free of the knots, rings, and grain of real wood. The result? A composition that is very easy to cut, and therefore often used for such upscale applications as custom trim work and cabinetry. Plus, its hard, smooth surface takes veneer and paint very well.