https://www.awwwards.com/staydryroof/">https://www.awwwards.com/staydryroof/. A quality roofing system will certainly have them installed all around the side of the roofline, where upright walls meet the roofing slope, https://alvinndqw601243.blogpixi.com/39847392/stay-dry-roofing-can-be-fun-for-anyone