https://blogfreely.net/staydryroof/2o3fu8cnw2">https://blogfreely.net/staydryroof/2o3fu8cnw2. A high quality roof will have them set up throughout the edge of the roofline, where upright walls meet the roofing slope, https://violacuto701165.ziblogs.com/39828039/what-does-stay-dry-roofing-mean