This is the first time on a chatroom so, and on the internet so work with me. I'm a builder not a computor geek. I want to install 3/4" wood floor over a dry concrete slab. It's an existing sunroom thats part of the home, currently carpeted and dry. i'm not too worried about transitions to the other rooms. I need some ideas on what type of underlayment to use. I was going to put down Ice and water shield first.