My friend wants to use his metal garden shed as a coop. He said he was going to line the walls with plywood and reinforce the roof (snow load). It is up off the ground on a heavy wooden platform. He asked me what I knew about using metal garden sheds for coops. I know nothing We get the same weather as Washington State. He said he would remove the snow from the roof and vent it well with sliding vents. Anybody have a opinion, good, bad, suggestions either way?