Just finished building a platform for a new metal storage shed. Sitting on piers set in concrete. I leveled and plumbed the posts, set the joists and leveled them, then laid down the plywood.
Due to predicted rain I covered the entire thing with a big blue tarp.
Woke to find that not only had it rained but the platform was so level it would not drain the water off. I had a skim of water covering the complete platform. Had to sweep it off to do today's work.
Hopefully it is also square so the metal shed will go together properly.
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