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

https://docs.google.com/document/d/1j1TGWNCA5WGnzbC9RzM2IpUWny-zygzUy4x82K22SSI/edit?usp=sharing

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