https://johnnylist.org/Stay-Dry-Roofing_323476.html">https://johnnylist.org/Stay-Dry-Roofing_323476.html. A quality roofing system will certainly have them mounted around the side of the roofline, where upright wall https://lewiseahs867750.suomiblog.com/a-biased-view-of-stay-dry-roofing-55236971