its funny
as a non roofer, ive been watching a few you tube videos on the subject and it didnt take long untill i got sidetracked watching "worst roof inspections" videos
but since i got your attention, i want to do a "closed valley"
View attachment 1715739689
(ignore the arrows)
from all the videos ive watched, this seems to be the "easiest" way to do it as a novice
BUT none of the videos ive seen used 3 tab shingles
is this a coincidence or can i not do this with a 3 tab?
oh, and im not worried about the code on a shed