https://triberr.com/staydryroof">https://triberr.com/staydryroof. A top quality roof will have them set up all around the edge of the roofline, where upright walls fulfill the roofing slope, around pipes that hold up https://theojafn462889.amoblog.com/stay-dry-roofing-can-be-fun-for-anyone-61349089