We knew we had 3 floors, the blue linoleum, followed by a 1/4" wood chip filler layer, then the "stone" linoleum, followed by another 1/4" filler, then the lovely green Armstrong flooring. We were surprised to find below that a mix of douglas fir vertical cut and solid oak hardwood flooring for another layer. This all had to be removed as well. In the interest of time and money I decided this would be a good weekend demo project. It was cathartic and great exercise.