Having been very sceptical of the onduline roofing system of my new coops, I'm now completely convinced that it's brilliant. It's stood the test of much higher winds than we had in the 'hurricane' a few weeks ago - all dry inside, completely solid even without a layer of wood.
Oh, and we tried to take down the goose shed to move it yesterday and that is so solid, we can't pull it apart so it has to stay where it is. That's not going anywhere in a storm either. Our only problem is the main hen house which has a heavy wood/felt roof but for some reason it's not attached to the rest of the house so it has lifted in the past and is now covered in bricks and rocks to weigh it down. I'll be putting onduline onto that this year sometime since it's also leaking where the geese have chewed the felt they can reach.
Now the house roof is a completely different question - roofer needed soon to replace tiles.