https://writeablog.net/staydryroof/b6h6pgv4yc">https://writeablog.net/staydryroof/b6h6pgv4yc. A quality roofing will have them mounted all around the side of the roofline, where upright wall surfaces meet the roof https://gerardofqa842220.blogvivi.com/40148608/the-smart-trick-of-stay-dry-roofing-that-nobody-is-discussing