https://myxwiki.org/xwiki/bin/view/XWiki/staydryroof">https://myxwiki.org/xwiki/bin/view/XWiki/staydryroof. A high quality roofing will have them installed around the edge of the roofline, where upright wall surfaces https://monicaipbo053907.digiblogbox.com/63888323/the-20-second-trick-for-stay-dry-roofing