https://www.openlearning.com/u/staydryroofing-t93m0l/about/">https://www.openlearning.com/u/staydryroofing-t93m0l/about/. A quality roofing system will certainly have them installed all over the edge of the roofline, https://abelefzv390547.designertoblog.com/70718263/the-smart-trick-of-stay-dry-roofing-that-nobody-is-talking-about