https://www.pubpub.org/user/stay-dry-roofing">https://www.pubpub.org/user/stay-dry-roofing. A top quality roofing system will have them set up around the side of the roofline, where vertical walls meet the roofing https://marleytzvf847447.howeweb.com/40184451/stay-dry-roofing-fundamentals-explained