Bullets can and will leave holes in a roof.
Bullet holes

Bullets can and will leave holes in a roof.
This chimney top is rusted through!
This fireplace chase appeared to be twisted a bit, so I walked the roof and gave it a slight push and it almost fell off the house!
Poor installation of a furnace vent pipe. This will leak and cause damage to the interior of the home.
Improper roof repairs… Welcome mats used to repair missing shingles!
Improper seal at skylight was causing rot under shingles.
Low quality roof installation at the edge allows for much rot behind the gutters.
Warped shingles were caused by heat build up in the attic below.
Slate roof with improper tar repairs.
The front of this roof showed no problems but as we can see in this photo the rear roof has serious concerns.