I was attempting to replace my linoleum floor, I discovered a black tar adhesive under the old Linoleum, When I tried to pull the old Linoleum up, The floor started to splinter!, There seems to be a top thin layer of wood over the sub-flooring?, This is coming up with the Linoleum, Should I just leave the old Linoleum like it is and put the new linoleum over it?, Or should I go thru hell and high water and replace the entire floor???