https://www.pearltrees.com/staydryroof1/item775054662">https://www.pearltrees.com/staydryroof1/item775054662. A top quality roofing system will have them installed around the edge of the roofline, where upright wall https://inesjqyh309121.csublogs.com/47132702/some-known-questions-about-stay-dry-roofing