A detailed roof installation includes valley metal, kickout flashing, and counterflashing to guide water safely away.

https://docs.google.com/document/d/1yIS9uf8e4SqhJ79jxPg1SPin468vWAOaMQLjyTVDCpo/edit?usp=sharing

A detailed roof installation includes valley metal, kickout flashing, and counterflashing to guide water safely away.