https://hearthis.at/stay-dry-roofing/set/stay-dry-roofing/">https://hearthis.at/stay-dry-roofing/set/stay-dry-roofing/. A high quality roofing system will have them installed around the edge of the roofline, where https://jemimalaed070761.blogars.com/38118537/the-2-minute-rule-for-stay-dry-roofing