So, out of curiosity, why does it need to be covered?
If you're looking to build it to handle a snow load, you're talking about a pretty substantial roof.......A tarp, laid flat, will hold hundreds, possibly a thousand pounds of snow. You need some pretty solid walls to hold up that kind of weight. If you want it pitched to shed snow, you'll need rafters, or some sort of tent-like structure, which will need to withstand whatever kind of winds you get in Iowa.
GeorgiaGail's roof, like mine, keeps the predators out, while letting the snow pass through.
If you're looking to build it to handle a snow load, you're talking about a pretty substantial roof.......A tarp, laid flat, will hold hundreds, possibly a thousand pounds of snow. You need some pretty solid walls to hold up that kind of weight. If you want it pitched to shed snow, you'll need rafters, or some sort of tent-like structure, which will need to withstand whatever kind of winds you get in Iowa.
GeorgiaGail's roof, like mine, keeps the predators out, while letting the snow pass through.