Floorboard

A length of sawn or planed timber laid across joists to form the structural floor surface of a room. Traditional solid timber floorboards (typically 19–28 mm thick) can be sanded and refinished many times; engineered floorboards have a hardwood veneer bonded to a plywood core. Damaged, rotten, or missing boards should be replaced with matching timber and fixed at every joist to prevent movement and squeaking.