http://www.askmap.net/location/7673219/united-states/stay-dry-roofing">http://www.askmap.net/location/7673219/united-states/stay-dry-roofing. A top quality roofing will have them set up around the edge of the roofline, https://pennyqwvb741131.howeweb.com/40184388/a-biased-view-of-stay-dry-roofing