https://www.openlearning.com/u/staydryroofing-t93m0l/about/">https://www.openlearning.com/u/staydryroofing-t93m0l/about/. A quality roof will certainly have them mounted around the edge of the roofline, where vertical https://rishiagxe608234.blazingblog.com/39567436/getting-the-stay-dry-roofing-to-work