The Answer is Blowing in the Wind

Ok, I'm not holding out for my Nobel Prize, but I have got this roof gardening thing down to a simple, easy to use formula. Here it is, but remember, you saw it here first:

roof garden + high winds = hard, scary work

Throw in the fact that even though the artificial grass we were laying weighs nearly one and a half tons, and was being lifted by the wind as if it was a pancake being flipped on a teflon pan, and the fact that there is no real service elevator to get the couple of tons of materials up onto the roof of the 10 storey building...well lets just say my calf muscles would now give Usain Bolt a run for his money.