Hello everyone, I recently bought a fixer upper house and have gutted the bathroom to the studs. I have a friend who is helping me build up a new one. He is a very intelligent guy and knows a ton about home renovations but he is insisting to put 1/2" plywood panels around the tub enclosure (I will be using a 3 piece acrylic tub enclosure glued to the plywood) and then 1" plywood screwed to the current subfloor to put the tiling over. I have done some research on this however and have found that plywood in bathrooms could be a problem. Is this something that is commonly done? Should I be worried about going this route and insist on using cement board instead? Thanks for any help on this.