National Hardwood Flooring & Moulding announces its new line of engineered hardwood flooring. Heritage is a 5/8" thick unfinished or prefinished plain sliced 6-ply veneer flooring, with a 3/16" top wear layer, and is available in 3-, 4- or 5-inch widths by 8-foot lengths. Heritage is a premium engineered material that can either be glue or nailed down.