https://www.gaiaonline.com/profiles/staydryroof/50635355/">https://www.gaiaonline.com/profiles/staydryroof/50635355/. A top quality roofing system will certainly have them installed around the side of the roofline, https://jonaskczl561969.tribunablog.com/how-stay-dry-roofing-can-save-you-time-stress-and-money-53909428