Engineered hardwood flooring stands as a more than viable alternative to solid hardwood flooring particularly when you're looking to install below grade (in a basement for example), or on concrete. Engineered hardwood floors are made up of a top layer of a real hardwood species and a core, typically consisting of multiple plywood layers laminated together to form a durable plank, or in some cases HDF (high density fiberboard).
The stacking of the layers is designed to counteract the natural tendency of hardwoods to expand, contract, warp, or cup when exposed to different environmental factors. This makes engineered hardwood flooring an excellent alternative in geographical areas that have excessive moisture, or in building spaces otherwise unsuited for solid hardwood. Also, many engineered floors offer a floating floor option, allowing installation on a concrete sub floor, as long as the sub floor is clean, dry, and level.