I have been collecting pallets, and now have over 80 of them. Some are stacked full of wood. I am going to build some wood sheds this year and was wondering how you keep ground moisture at bay. I see many have raised floors, but I am building on the more affordable side of things. Is it worth it to raise the floor up a foot or so? Plastic under the wood would keep moisture down, but would also hold any water that did get in.