Hi I have this floor https://www.dropbox.com/s/puppt3eh9odubbe/2017-01-20%2016.35.32.jpg?dl=0
...as it's over uneven concrete. Its a basemwnt/storage space that I'm trying to revamp. I'm open to adding plywood to do right job? What type of plywood can I use? 1/2 or 3/4 and any specific type? Im...