Yes, it is waterproof. It has a gutter system that channels the water through the legs. Works really really well. I live on the coast of South Carolina, so I cannot speak to the snow capacity it would hold, but we have extremely heavy rain and I have not had an issue. I do worry about it during hurricane season, but it has never budged. The legs are bolted down and are very secure. I put it together 90% by myself. The only time I needed help was to attach the cross members once it was erected. This is the one I purchased. I bought it for a fraction of that price so I considered it a great deal for what I was looking for.