American Maple, prime grade, 128mm x 19mm.
Our clients were renovating their holiday home to move in permanently. The substrate is particleboard.
A particleboard substrate had a large hump in the middle of the room. We remedied this by lifting the particleboard sheets, buzzing down the joists and relaying the particleboard. This was to create a flat substrate for the new wooden floor.
Moisture-cured polyurethane, satin.