Not so much "on" as "under." So it turns out that a tin roof gets really hot. It is always best to keep your bees in partial shade and partial sun but that is not always possible. So our hives that are in the sun have been getting too hot for the bees. In the heat of the day we see a ton of bees out on the landing pad because the inside is way too toasty. So to fix this we made up some bamboo roof covers to shade the hives. It was simple, quick, and free! We went to the bamboo walk, harvested some bamboo, cut it down to size, and nailed the bamboo to pieces of scrap wood. Easy peasy!