Inspected a house today- this was detail at valley- cut valley until the last 2 -3 rows where it became a woven valley- Is this a defect, just poor work or both- it was a new house.
What type of roof was it? I ask because I’ve seen this twice before, but both honestly made sense to me in regard to the ‘why’ as they both had different pitches throughout the runs.
One was basically a valley on a gambrel with a very long sprocket. The other was a valley created by a porch covering that had a considerably lower slope than the roof it tied into on the other side.
I don’t know that I’d actually call anything out on it. The line looks good, and it doesn’t look steep enough to risk drainage rut or ice damming as an effect. If I were guessing, I would think multiple installers on the runs and one of them relatively new to the work.
Definitely want to relay it to the client so they are aware, but unless you saw something specific I don’t think it is something I’d include as a flagged item.
Nothing wrong with it as long as it was weaved correctly and the rest of the valley was done right.
Roofers are taught to weave the first one or two courses when doing a closed center-cut valley. There are several technical reasons for this. The biggest one is if you cut the first course you would have exposed valley flashing and it would look strange.