https://www.kickstarter.com/profile/staydryroof/about">https://www.kickstarter.com/profile/staydryroof/about. A top quality roofing will have them set up all around the side of the roofline, where upright wall surfaces https://heathukge251304.humor-blog.com/38111215/indicators-on-stay-dry-roofing-you-need-to-know