For my sake, please advise as to why we would comment on the R factor of insulation? I understand why we report on the presence or absence of insulation; as well as whether it may have been installed properly.

In my experience, blown insulation compresses over time, batts do not. As the blown insulation compresses, voids are created at the top, thereby eliminating the R factor in those areas. And, the loss of air pockets in the bottom portions of the wall, as the compression continues, greatly reduces the effective R in the bottom portions of the wall. If you are using an infrared camera, you should pick this up; but, without the camera, we would probably never actually observe this. The presence of blown insulation in the attic could lead us to surmise the rest; but, our inspections should not, I believe, be based on surmise.

So, in the presence of blown insulation that appeared to provide complete area coverage; and, which was relatively even in depth, would you say anymore?
Gary