I have not come across this type of exterior finish before…
Sellers told my client it is stucco…
Found a small broken off piece on the porch roof. It is heavy for it’s size, and feels and looks just like mortar…
It appears to be coming off/separating in large areas. Cracks on all exterior walls. Due to extensive reno, no evidence on interior walls. Interior walls are plumb. There is some cracking in the foundation, not as severe, in general area of the larger wall cracks.
That vertical crack in the first picture quite likely results from water getting iinto the wall due to the lack of kick-out flashing at the roof-wall junction above - lack of a kick-out is a Bad Sign as regards the general quality of the work.