They fine when they've got something in them but don't underestimate the power of the wind. On my allotment site during the last wind recorded 1 & 1/2 miles away as 100mph a lot of people had their sheds blow over or away. Quite a few were brand new sheds and one flew 3 plots almost intact. My shed is weighed down with bags of sand and soil which wouldn't stop the roof going.....
We get strong winds as we have a very exposed site which is why I anchored my compost bins. Apparently we had a lovely hedgerow for shelter along the side were the prevailing wind comes from but the council removed for no particular reason about 4 years ago!
