I am building my second elevated platform for a Maverick (Polyethylene) blind. As with the first one, my platform is large enough to have some space to stand while entering and exiting the blind door, and this platform is 8' x 9'. I have assumed that, since parts of the platform are open to the elements, using deck boards is the way to go for the platform floor. But, I'm starting to wonder if plywood or OSB would work ok. The issue with using decking boards is that as the treated boards shrink, there will be gaps between the boards, which then allow insects and bugs to get in, requiring something to be put on the floor inside of the blind itself. How would the plywood or OSB hold up that is outside of the blind? Has anyone come up with something good to put on top of deck boards inside the blind, other than treated plywood or OSB, which will significantly add to the cost?