https://www.storeboard.com/staydryroofing6">https://www.storeboard.com/staydryroofing6. A quality roofing will have them mounted around the edge of the roofline, where upright wall surfaces satisfy the roof covering https://adreaclrm774891.blogpixi.com/39847505/the-smart-trick-of-stay-dry-roofing-that-nobody-is-talking-about