Come play Tennis on this roof with me. Ya don’t find this from on the ground or standing on a ladder. Ya have to get your KC Bottom on the roof. Today was like a walk in the Park:p:D
Hey Jeff Moore I found one today with a cricket almost forgot what they looked like;-)
Heat and cold with the bend of the ridge cap and its starts minor cracking where it bends then here comes those dam black birds with the long tails and they sit up there and peck at the gravel just for fun and what you see is the results I see this a lot
Here in KC, with 10 below winters and 105 degree summers, comp valleys hold up only about 10 years here, a third of the life of the rest of the roof. I always note them on reports when seen, and suggest annual monitoring/repairs if needed. Metal valleys here are best due to adverse weather. Your area may vary.