https://penzu.com/p/667134efe927f639">https://penzu.com/p/667134efe927f639. A quality roof covering will certainly have them mounted all around the edge of the roofline, where vertical walls meet the roofing system https://safauvlp091868.blogsidea.com/46236863/stay-dry-roofing-can-be-fun-for-anyone