■ VENEER CORE is made up of many layers of hardwood bonded together. The layers are assembled with alternating grain direction, called crossbanding. This makes a strong, rigid, lightweight sheet with excellent screw-holding capability. Because of these qualities, veneer core is my first choice in most cases.
■ PARTICLEBOARD CORE is the least expensive option. Like MDF core, it’s flat and stable with consistent thickness. But particleboard core is a bit worse in the screw-holding category. Also, it’s a special-order product, at least from my lumberyard, whereas MDF core is readily available.
■ LUMBER CORE consists of edge-glued strips of wood, usually basswood. On both sides of the core, there’s a crossbanded veneer, then the face veneer. Like veneer core, it has excellent screw-holding capability, strength and rigidity. But it’s…