Engineered timber flooring is made from a real timber top layer, called the wear layer, bonded to multiple layers of stable backing material, usually plywood or HDF. This layered construction gives you the authentic look and feel of solid timber, with far greater resistance to the humidity and temperature changes that cause solid timber to expand, contract and warp. For most Australian homes, including those built on concrete slabs, engineered timber is the more practical and stable choice over solid timber.