I pulled up some of my vinyl sheet flooring to check if there was hardwood underneath, and it actually just pulled right up to reveal plywood. I thought I would just pull the entire floor up and see if I could get away with not putting down the underlayment.
Big mistake! As you probably guessed, the floor quickly start sticking to the plywood as I worked further and the wood actually starting cracking and falling apart. So now I'm stuck with a section of floor that is half subfloor and half the bottom layer of the vinyl. This section stops at the edge to the rest of the floor -- so there is 1/8" difference between the intact vinyl floor and the part I've destroyed.
QUESTION: Do I need to remove at least the top layer of the rest of the vinyl to match the thickness of the bad section more closely? Or, can I use leveler to smooth out the 1/8" edge and install the underlayment over that section (with the edge at the middle of the board)?