Agree with Islandroofing that it is a dead valley.
I wouldn’t put Ice and water shield and shingles
on that low slope.
The one side looks less than a 1/12
This material was Required!!!
And city inspected. Twice i assure you!
And they are more stringent
Than anywhere in the united states…
Also, no one makes the proper modified bitumen to match that shingle color.
Since i knew i needed to do this dead valley
I would guide the customer toward the shingle color that i knew i can match with the limited available modified bitumen colors.
If there is a mountain of water hitting that walls corner than i would run my modified bitumen up the side wall so the water doesnt soak into a old deteriorating, cracking stucco.