I want to address how different angles can show when something can look very minor, to something pretty significant.
My first pic from the ground shows what looks like maybe some lifting tiles. Not really a big deal.
My second pic from up close shows that their could be some potential sagging? So I decided to move my ladder to get a better side angle. Note this is an 11 month warranty so I can't walk on the roof due to voiding the warranty.
My third pic really tells the story! There definitely is sagging in this roof. It looks to be about the length of a full sheet of roof decking. Remind you...this is only 10 months old! Luckily the owner decided to get an inspection because of cracking floor tiles and we caught this too. Now it's in writing and documented before his 1yr warranty expires. This roof issue would be thousands of dollars to fix down the road. If Something doesn't seem or look right go with your gut and get an inspection!