https://www.gaiaonline.com/profiles/staydryroof/50635355/">https://www.gaiaonline.com/profiles/staydryroof/50635355/. A top quality roofing will have them mounted all around the edge of the roofline, where upright wall https://lexiepaul141091.boyblogguide.com/38295951/the-main-principles-of-stay-dry-roofing