Doing a Pre- 4 point for a friend an this is his roof. It is over dimensional planking / lumber and I could see at least one nail for the roof deck but what is the covering. It was kind of crumbly in one place on an edge where I could see like stucco. He had thought it was a concrete deck but I do not. It sounded almost hollow"ish" Kind of stucco like not concrete like and had a SOMAY roof type paint covering it. it was very solid with no signs of leaks but I just want to know what it is.
Thanks in advice for any answers.