Subject house is a 2000 model with a 12:12 pitch (I did not climb for reasons I’ll share later)
Photo 1: Exhibits curling and vertical banding (not sure if that’s the right terminology). Can anyone offer an explanation on this, please?
Photo 2: Shingles are releasing in groups and sliding down the roof along with gravity. After sampling at several locations around the roof, I learned the roofing contractor used an air gun to attach the shingles. The nail heads completely or partially penetrated the shingle rendering its attachment marginal at best. The client is at a huge disadvantage and of course the builder is hoping to manage a very distant relationship on this one.
Photo 3: Just a few shingles exhibited this condition. Can someone kindly offer the reason for the wear/failure please?
Thanks in Advance,