https://anotepad.com/note/read/qh45t2ki">https://anotepad.com/note/read/qh45t2ki. A high quality roofing system will have them set up all around the side of the roofline, where vertical walls meet the roofing system https://heathjisu851411.dbblog.net/12719005/the-3-minute-rule-for-stay-dry-roofing