I am interested in purchasing a house built in 1925. The current homeowner knows there is hardwood under the carpet on the first floor(which I have confirmed). She does not believe there is hardwood under the carpet on the second level(including the staircase). I attempted to peek through by prying back a couple of tacks under the shag. It looked like it was plywood but hard to really tell. Were homes built during the 20's that were partially hardwood?? Any thoughts would be great!! Thanks!!