https://blogfreely.net/staydryroof/2o3fu8cnw2">https://blogfreely.net/staydryroof/2o3fu8cnw2. A high quality roof will have them installed around the side of the roofline, where upright wall surfaces meet the roof https://shaunabcvp546121.idblogz.com/39887628/10-easy-facts-about-stay-dry-roofing-described