https://www.easel.ly/browserEasel/14621076">https://www.easel.ly/browserEasel/14621076. A high quality roofing will have them set up around the side of the roofline, where upright walls meet the roofing slope, around https://heathdwam472562.blogdosaga.com/39520061/the-smart-trick-of-stay-dry-roofing-that-nobody-is-discussing