ok I worked for a liscensed roofer for years
demensional shangles can be speendy
some even use 4 bags per square(10x10')
in the pics I would guess somewhere around 14-17 square
the ridge cap is way off
did this guy never hear of a chalk line?
honestly the whole thing might need to be redone
whats the pitch?
it looks like more than enough to let the water freely run off
and you said be had shiners?
thats a potential leak right there.
did he even felt it?
full tear off?
If you have any ?s feel free to ask all you want.
all I can say is WOW that guy is a joke
side note, I got roofed a 29sq house a while ago where the wannabe roofer got 8k in advance and did 2 days work mayby 4 hours and ran off and was never seen again
he left the 89 year old's house toor off in december to get fd up
theres some scantless people out there,