On our most recent weekly trip to HomeDepot we checked out the availability of a light weight gutter ,joint and downspout. We did not find anything. We could use the corrugated/tubelike downspout as it appears to be light but really need the weight bearing part (gutter and joint(s) ) to be lighter. Our coop will have metal roofing and a 3 piece aluminum ventilation system which is light weight and will be on the roof. Our coop is small. Any ideas are welcome. Let the creativity juices flow............... not the rain!