My wife and I were given a nice sheet metal shed by our neighbor. With it came a wooden platform to set it on. This platform has seen many a season and the wood has absorbed an enormous amount of water (super heavy). It's even a little slick with some moss/mold growing on it. The wife thinks it's all unhealthy killer mold & we should replace it. I'm of the mind that it's fine. It could possibly end up being a playhouse for the kids but more likely it will be used for storage. I'm looking for some informed opinions that will either sway me or give me "I told you so" ammo. Thanks.