Radiant Barrier Insulation

cdx plywood. You can find some with one side sanded. Be picky, you’ll find it. Stay away from osb and bare board. I would not use Masonite either.

I am not a carpenter by any means so I ask, what is wrong with OSB? I know its not for moisture but inside walls of a shop? I used it on the inside walls of mine on the recommendation of a longtime contractor I know. Its spaced off the floor 3/4 of an inch so its not sitting on the concrete. I love the stuff, as said its super strong and I can hang anything anywhere. I have had no issues with it for three years but again, I am not a carpenter so is there something I am missing?