https://hearthis.at/stay-dry-roofing/set/stay-dry-roofing/">https://hearthis.at/stay-dry-roofing/set/stay-dry-roofing/. A top quality roofing will have them mounted throughout the edge of the roofline, where upright https://amaangisf864008.techionblog.com/39748268/the-ultimate-guide-to-stay-dry-roofing