https://myxwiki.org/xwiki/bin/view/XWiki/staydryroof">https://myxwiki.org/xwiki/bin/view/XWiki/staydryroof. A top quality roof will have them mounted all over the side of the roofline, where vertical walls meet the roof https://jessenwrs118652.iyublog.com/38379926/about-stay-dry-roofing