We have recently purchased a house that was built in around 1780. It has pine floorboards upstairs but at some point a solid concrete floor has been laid downstairs. As I plan on having carpet upstairs I was wondering how feasible it would be to lift the floorboards from upstairs and re-use them downstairs. I have laid a wooden floor on to concrete before but that was with new wood that was tongue and grooved all round so I just glued it and laid as a floating floor. My floorboards from upstairs are square edged so I am not sure how I wouuld go about fixing them downstairs. Any thoughts appreciated.