Hi everyone. I have removed our old bathroom tiled floor down to the plywood sub floor. I am left with lots of patchy adhesive on the ply. I am going to lay new laminate. I need to make up a level difference of 10mm so was going to re board over with ply. Removing the old adhesive is slow going so was wondering how level I need to make the existing sub floor. Can I leave old patches if adhesive on there and just lay new ply over? Thank you.