I zip tied the ones I used on my tractor; no problems yet, but the sun's uv can't get through the tarp to ruin them. I'm wondering, though, if cage clips, like you'd use for building wire cages or live traps, would be strong enough or large enough.I'll take pictures as I go. It's tough to really explain as only half of the tall wall side will be attached to the coop, I'll be building basically a stud wall to extend the length beyond the coop to catch the winter sun. Then I'll grow things on it like you for summer shade. I hope to get started pretty quickly here so pics could be soon!