Bruce
Herd Master
Has it been tested? It very likely IS lead but I think I'd test it before deciding what to do. I pulled out layers and layers of wood plank, shims, and at least 5 layers of sheet flooring (which said in BOLD caps "NOT LINOLEUM" suggesting it was better than that stuff) in what is now the laundry room. From the looks of things there was probably a wood cookstove in there way back when. Underneath it all was a painted hardwood floor still in good shape (unlike the stuff above) which I pulled out assuming it was lead paint. The carpenters later told me that given the age of the house the paint might not have been lead based. Too late.Not sure I agree but with the lead paint on all the upstairs floors it may be the best/easiest option.
I think it was common for "better off than poor but not rich" people to put in a plywood floor with plank wood around the outside as an accent. Likely the plywood was covered with a rug.Too bad there isn't old hardwood floors beneath. The plywood in the middle sounds like the original floors rotted out.