A couple of roofers walk around on a poorly-roofed roof and point out all (all? -- many) of the roofing problems
The highlights (lowlights?):
- Hitchhikers
- Overlapped shingles instead of butted
- Under-driven nails
- Over-driven, angeled nails
- Wavy course lines
- Wildly inconsistent exposures
- Ugly beauty strips
- Butted drip-edge
- Humpy flashing
The list goes on.