The shed roof looks like my plastic fence you asked a picture for except the fence is quite a bit darker and thicker - probably 50mm thick.
ps - spray your roof with roof moss killer - did mine and scraped all moss off and it's been moss free for years - just spray a weak moss killer solution over it once a year - looks so much better.
ps - spray your roof with roof moss killer - did mine and scraped all moss off and it's been moss free for years - just spray a weak moss killer solution over it once a year - looks so much better.