Species: Hickory Construction: Engineered Construction Solid Hardwood FlooringSolid flooring is milled from a single slab of wood, including all character marks and defects grown into the tree. Solid wood is dependent on the natural grain structure to remain flat and straight. It is typically 3/4" thick and must be nailed to a wood sub-floor for proper installation.Solid Composite Hardwood FlooringSolid composite is a blending of both solid and engineered technologies to create a more stable product in wider widths. Utilizing strips of solid 3/4" wood 1-2 inches in width, these strips are glued together into a single wide plank. The separation of grain direction into these narrow strips reduces the strength of any one strip, allowing the entire plank to be resistant to cupping, crowning or bowing. This product can be made from the leftover material when standard width boards are cut to size. Most of this left over material is usually ground up into sawdust. This post-industrial recycling of this material is a better use of the natural resources.Veneer Core Engineered Hardwood FlooringEngineered hardwood flooring is created by gluing 3 to 9 thin layers or plys of wood together using a premium appearance hardwood for the top layer. Each layer is stacked in a cross-grain configuration and bonded together under heat and pressure.