Ive got another flooring project I’ve started on in the laundry room. Right now, it has laminate(?) down. I guess that’s what it’s called; it’s the sheets that roll out and have adhesive on the bottom. I bought a brand new floor scraper, but I’m still having a rough time even getting the top layer up. I did score it with a knife so it’ll tear into smaller squares, but it’s not coming up real easy. I’m definitely not getting any of the gray covering you see in the pic to come up. I’m assuming that’s the backing that had the adhesive on it? Does that gray material have to be removed, or can I leave it? I’m using the Ditra fabric underlayment when I install the new tile.